Public Input No. 158-NFPA 58-2017 [ Global Input ...

Public Input No. 158-NFPA 58-2017 [ Global Input ]

Repalce "back check valve" with "check valve".

Statement of Problem and Substantiation for Public Input

The term "check valve" is used extensively in the Code, and "back check valve" is used only 3 times to mean the same piping system component. This change will make all references the same.

Submitter Information Verification

Submitter Full Name: Theodore Lemoff

Organization: TLemoff Engineering

Affilliation: None

Street Address:

City:

State:

Zip:

Submittal Date: Fri Jun 23 14:05:28 EDT 2017

National Fire Protection Association Report http://submittals.nfpa.org/TerraViewWeb/ContentFetcher?commentPara...

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NFPA 58 PUBLIC INPUTS A2019 of 275


Substitute "and" for "in combination with" throughout the Code (numbered paragraphs only).


The phrase "in combination with" is used in 14 locations in the Code. In each of these it refers to two valves installed in series at a container. Substituting "and" simplifies the text and prevents misinterpretation. The phrase, "in combination with" has been interpreted to mean that the 2 valves must be combined in a single valve body, which is not the intent.




Affilliation: None

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Submittal Date: Mon Jun 26 17:56:57 EDT 2017


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Delete "filled on site at the point of use" and substitute "filled at the point of use" in thecode, annexes, and in Figure I.1(a).


The term "filled on site at the point of use" is redundant and not needed. The simpler, "filled at the point of use" is clear. The term "filled on site" was used in the 2008 and previous editions and is industry jargon to mean filled where used. As any point of filling is a site the phrase was revised in the 2011 edition as a compromise. This compromise is no longer needed as the proposed term is clear to code users and enforcers.

Related Public Inputs for This Document

Related Input Relationship

Public Input No. 56-NFPA 58-2017 [Section No. I.1]



Organization: TLemoff Engineerng

Affilliation: None

Street Address:

City:

State:

Zip:

Submittal Date: Tue May 02 12:57:50 EDT 2017


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Public Input No. 88-NFPA 58-2017 [ Chapter 2 ]

Chapter 2 Referenced Publications

2.1 General.

The documents or portions thereof listed in this chapter are referenced within this code andshall be considered part of the requirements of this document.

2.2 NFPA Publications.

National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02169-7471.

NFPA 10, Standard for Portable Fire Extinguishers, 2013 edition.

NFPA 13, Standard for the Installation of Sprinkler Systems, 2016 edition.

NFPA 15, Standard for Water Spray Fixed Systems for Fire Protection, 2017 edition.

NFPA 25, Standard for the Inspection, Testing, and Maintenance of Water-Based FireProtection Systems, 2017 edition.

NFPA 30, Flammable and Combustible Liquids Code, 2015 edition.

NFPA 30A, Code for Motor Fuel Dispensing Facilities and Repair Garages, 2015 edition.

NFPA 51B, Standard for Fire Prevention During Welding, Cutting, and Other Hot Work, 2014edition.

NFPA 54, National Fuel Gas Code, 2015 edition.

NFPA 55, Compressed Gases and Cryogenic Fluids Code, 2016 edition.

NFPA 59, Utility LP-Gas Plant Code, 2015 edition.

NFPA 70®, National Electrical Code®, 2017 edition.

NFPA 99, Health Care Facilities Code, 2015 edition.

NFPA 101®, Life Safety Code®, 2015 edition.

NFPA 160, Standard for the Use of Flame Effects Before an Audience, 2016 edition.

NFPA 220, Standard on Types of Building Construction, 2015 edition.

NFPA 1192, Standard on Recreational Vehicles, 2015 edition.

2.3 Other Publications.

2.3.1 ANSI Publications.

American National Standards Institute, Inc., 25 West 43rd Street, 4th Floor, New York, NY10036.

ANSI/ASME B1.20.1, Pipe Threads, General Purpose, Inch, 2013.

2.3.2 API Publications.


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American Petroleum Institute, 1220 L Street, NW., #900, Washington, DC 20005-4070.

API-ASME Code for Unfired Pressure Vessels for Petroleum Liquids and Gases, Pre-July 1,1961.

API 607, Fire Test for Quarter-Turn Valves and Valves Equipped with Non-Metallic Seats,2010 201 6 .

API 620, Design and Construction of Large, Welded, Low-Pressure Storage Tanks, 2008 with2009, 2010, 2012 Addenda, and 2013 2014 Addendum .

2.3.3 2 ASCE Publications.

American Society of Civil Engineers, 1801 Alexander Bell Drive, Reston, VA 20191-4400.

ASCE 7, Minimum Design Loads for Buildings and Other Structures, 2010.

2.3.4 3 ASME Publications.

ASME International, Two Park Avenue, New York, NY 10016-5990.

ASME B1.20.1, Pipe Threads, General Purpose, Inch, 2013.

“Rules for the Construction of Unfired Pressure Vessels,” Section VIII, ASME Boiler andPressure Vessel Code, 2013 201 7 .

ASME B31.3, Process Piping, 2014 201 6 .

ASME B36.10M, Welded and Seamless Wrought Steel Pipe, 2015 201 6 .


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2.3.5 4 ASTM Publications.

ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA19428-2959.

ASTM A47/A47M, Standard Specification for Ferritic Malleable Iron Castings, 2014.

ASTM A48/A48M , Standard Specification for Gray Iron Castings, 2008 2016 .

ASTM A53/A53M, Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated,Welded and Seamless, 2012.

ASTM A106/A106M, Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service, 2013 2015 .

ASTM A395/A395M, Standard Specification for Ferritic Ductile Iron Pressure-RetainingCastings for Use at Elevated Temperatures, 2014.

ASTM A513/A513M , Standard Specification for Electric-Resistance-Welded Carbon and AlloySteel Mechanical Tubing, 2014 2015 .

ASTM A536, Standard Specification for Ductile Iron Castings, 2009 2014 .

ASTM B42, Standard Specification for Seamless Copper Pipe, Standard Sizes, 2010 2015a .

ASTM B43, Standard Specification for Seamless Red Brass Pipe, Standard Sizes, 2009 2015 .

ASTM B86, Standard Specification for Zinc and Zinc-Aluminum (ZA) Alloy Foundry and DieCastings, 2013.

ASTM B88, Standard Specification for Seamless Copper Water Tube, 2014 2016 .

ASTM B135, Standard Specification for Seamless Brass Tube, 2010.

ASTM B280, Standard Specification for Seamless Copper Tube for Air Conditioning andRefrigeration Field Service, 2013 2016 .

ASTM D2513, Polyethylene (PE) Gas Pressure Pipe, Tubing, and Fittings, 2014 2016 .

ASTM D2683, Standard Specification for Socket-Type Polyethylene Fittings for OutsideDiameter-Controlled Polyethylene Pipe and Tubing, 2010.

ASTM D3261, Standard Specification for Butt Heat Fusion Polyethylene (PE) Plastic Fittings forPolyethylene (PE) Plastic Pipe and Tubing, 2012 2016 .

ASTM E119, Standard Test Methods for Fire Tests of Building Construction and Materials,2012 201 6a .

ASTM F1055, Standard Specification for Electrofusion Type Polyethylene Fittings for OutsideDiameter Controlled Polyethylene and Crosslinked Polyethylene (PEX) Pipe and Tubing, 20132016 .

ASTM F1733, Standard Specification for Butt Heat Fusion Polyamide (PA) Plastic Fitting forPolyamide (PA) Plastic Pipe and Tubing, 2013.

ASTM F2945, Standard Specification for Polyamide 11 Gas Pressure Pipe, Tubing, andFittings, 2012 201 5 .


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2.3.6 5 CGA Publications.

Compressed Gas Association, 14501 George Carter Way, Suite 103, Chantilly, VA 20151-1788.

CGA C-6, Standard for Visual Inspection of Steel Compressed Gas Cylinders, 2013.

CGA C-6.3, Standards for Visual Inspection of Low Pressure Aluminum Alloy Compressed GasCylinders, 2013.

CGA C-7, Guide to Classification and Labeling of Compressed Gases, 2014.

CGA S-1.1, Pressure Relief Device Standards, Part 1— Cylinders for Compressed Gases,2011.

CGA S-1.3, Pressure Relief Device Standards,Part 3 — Stationary Storage Containers forCompressed Gases, 2008.

CGA V-1, Standard for Compressed Gas Cylinder Valve Outlet and Inlet Connections, 2013.

2.3.7 6 CSA Group Publications.

Canadian Standards Association, 178 Rexdale Blvd., Toronto, ON, M9W 1R3, Canada.

ANSI/CSA 6.26 (LC1), Interior Fuel Gas Piping Systems Using Corrugated Stainless SteelTubing, 2014.

ANSI/CSA 6.32 (LC4a), Press-Connect Connect Metallic Fittings for Use in Fuel GasDistribution Systems, 2012.

ANSI Z21.18/CSA 6.3, Gas Appliance Regulators, 2012.

ANSI Z21.80/CSA 6.22, Standard for Line Pressure Regulators, 2003 (reaffirmed 2008 with2012 addenda).

CSA B149.5, Installation Code for Propane Fuel Systems and Containers on Motor Vehicles,2015.

2.3.8 7 ISO Publications.

International Organization for Standardization. ISO Central Secretariat, BIBC II, Chemin deBlandonnet 8, CP 401, 1214 Vernier, Geneva, Switzerland.

ISO/NP 19825, Road vehicles — Liquefied Petroleum Gas (LPG) Refuelling Connector, 2014.

2.3.9 8 NBBI Publications.

National Board of Boiler and Pressure Vessel Inspectors, 1055 Crupper Avenue, Columbus, OH43229.

NBBI NB23, National Board Inspection Code, 2015 201 7 .


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2.3.10 9 UL Publications.

Underwriters Laboratories Inc., 333 Pfingsten Road, Northbrook, IL 60062-2096.

UL 21, Standard for LP-Gas Hose, 2014.

UL 125, Standard for Flow Control Valves for Anhydrous Ammonia and LP-Gas (Other thanSafety Relief), 2014.

UL 132, Standard for Safety Relief Valves for Anhydrous Ammonia and LP-Gas, 2015.

UL 144, Standard for LP-Gas Regulators, 2012, revised 2014 .

UL 147A, Standard for Nonrefillable (Disposable) Type Fuel Gas Cylinder Assemblies, 2005,revised 2013 .

UL 147B, Standard for Nonrefillable (Disposable) Type Metal Container Assemblies for Butane,2005, revised 2013.

UL 263, Standard for Fire Tests of Building Construction and Materials, 2011, revised 2015 .

UL 514B, Standard for Conduit, Tubing, and Cable Fittings, 2012.

UL 567, Standard for Emergency Breakaway Fittings, Swivel Connectors, and Pipe-ConnectionFittings for Petroleum Products and LP-Gas, 2014.

UL 569, Standard for Pigtails and Flexible Hose Connectors for LP-Gas, 2013.

UL 651, Standard for Schedule 40, 80, Type EB and A Rigid PVC Conduit and Fittings, 2011,revised 2016 .

UL 1337, Outline of Investigation for LP-Gas, Natural Gas, and Manufactured Gas Devices forEngine Fuel Systems, 2013.

UL 1660, Standard for Liquid-Tight Flexible Nonmetallic Conduit, 2014.

UL 1769, Standard for Cylinder Valves, 2015.

UL 2227, Standard for Overfilling Prevention Devices, 2007.

2.3.11 10 ULC Publications.

ULC, 171 Nepean Street, Suite 400, Ottawa, ON K2P 0B4.

CAN/ULC S642, Standard for Compounds and Tapes for Threaded Pipe Joints, 2007.

2.3.12 11 United Nations Economic Commission for Europe Publications.

UN Economic Commission for Europe Information Services, Palais des Nations, CH-1211Geneva 10, Switzerland.

ECE R67.01, Agreement Concerning the Adoption of Uniform Technical Prescriptions forWheeled Vehicles, Equipment and Parts Which Can Be Fitted and/or Be Used on WheeledVehicles and the Conditions for Reciprocal Recognition of Approvals Granted on the Basis ofthese Prescriptions, Revision 4, 1998.

2.3.13 12 U.S. Government Publications.

U.S. Government Publishing Office, 732 North Capitol Street, NW, Washington, DC20401-0001.

Title 49, Code of Federal Regulations, Parts 173.301(h)(3), 173.315(n), and 192.283(b).

Title 49, Code of Federal Regulations, Part 192, Appendix D.

Title 49, Code of Federal Regulations, Part 192.281(e), “Transportation.”

Title 49, Code of Federal Regulations, Parts 171−180, 393, 396, and 397.

Interstate Commerce Commission (ICC), Rules for Construction of Unfired Pressure Vessels.


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2.3.14 13 Other Publications.

Merriam-Webster’s Collegiate Dictionary, 11th edition, Merriam-Webster, Inc., Springfield, MA,2003.

2.4 References for Extracts in Mandatory Sections.



Referenced current edition of referenced national consensus standards.ANSI/ASME B1.20.1 is now copyrighted by ASME.


Submitter Full Name: Aaron Adamczyk

Organization: [ Not Specified ]

Street Address:

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Submittal Date: Mon May 29 16:51:52 EDT 2017


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Public Input No. 1-NFPA 58-2017 [ Section No. 2.2 ]

2.2 NFPA Publications.

National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02169-7471.

NFPA 10, Standard for Portable Fire Extinguishers, 2013 edition.

NFPA 13, Standard for the Installation of Sprinkler Systems, 2016 edition.

NFPA 15, Standard for Water Spray Fixed Systems for Fire Protection, 2017 edition.

NFPA 25, Standard for the Inspection, Testing, and Maintenance of Water-Based FireProtection Systems, 2017 edition.

NFPA 30, Flammable and Combustible Liquids Code, 2015 edition.

NFPA 30A, Code for Motor Fuel Dispensing Facilities and Repair Garages, 2015 edition.

NFPA 51B, Standard for Fire Prevention During Welding, Cutting, and Other Hot Work, 2014edition.


NFPA 55, Compressed Gases and Cryogenic Fluids Code, 2016 edition.

NFPA 59, Utility LP-Gas Plant Code, 2015 edition.

NFPA 68, Standard on Explosion Protection by Deflagration Venting

NFPA 70® , National Electrical Code®, 2017 edition.

NFPA 99, Health Care Facilities Code, 2015 edition.

NFPA 101® , Life Safety Code®, 2015 edition.

NFPA 160, Standard for the Use of Flame Effects Before an Audience, 2016 edition.

NFPA 220, Standard on Types of Building Construction, 2015 edition.

NFPA 1192, Standard on Recreational Vehicles, 2015 edition.


Explosion venting is required for buildings housing LP-Gas distribution facilities. See sections 10.2.1.2, 10.3.2.2, 10.3.2.4, and 10.3.2.5. It is proper to reference the NFPA document that describes such venting.


Submitter Full Name: Richard Fredenburg

Organization: State of North Carolina

Street Address:

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Submittal Date: Tue Feb 14 10:13:44 EST 2017


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Public Input No. 163-NFPA 58-2017 [ Section No. 2.3.5 ]


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2.3.5 ASTM Publications.

ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA19428-2959.


ASTM A48, Standard Specification for Gray Iron Castings, 2008.

ASTM A53/A53M, Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated,Welded and Seamless, 2012.

ASTM A106/A106M, Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service, 2013.


ASTM A513, Standard Specification for Electric-Resistance-Welded Carbon and Alloy SteelMechanical Tubing, 2014.

ASTM A536, Standard Specification for Ductile Iron Castings, 2009.

ASTM B42, Standard Specification for Seamless Copper Pipe, Standard Sizes, 2010.

ASTM B43, Standard Specification for Seamless Red Brass Pipe, Standard Sizes, 2009.

ASTM B86, Standard Specification for Zinc and Zinc-Aluminum (ZA) Alloy Foundry and DieCastings, 2013.

ASTM B88, Standard Specification for Seamless Copper Water Tube, 2014.

ASTM B135, Standard Specification for Seamless Brass Tube, 2010.

ASTM B280, Standard Specification for Seamless Copper Tube for Air Conditioning andRefrigeration Field Service, 2013.

ASTM D2513, Polyethylene (PE) Gas Pressure Pipe, Tubing, and Fittings, 2014.

ASTM D2683, Standard Specification for Socket-Type Polyethylene Fittings for OutsideDiameter-Controlled Polyethylene Pipe and Tubing, 2010.

ASTM D3261, Standard Specification for Butt Heat Fusion Polyethylene (PE) Plastic Fittings forPolyethylene (PE) Plastic Pipe and Tubing, 2012.

ASTM E84, Standard Test Method for Surface Burning Characteristics of Building Materials,2017.

ASTM E119, Standard Test Methods for Fire Tests of Building Construction and Materials,2012 2017 .

ASTM E136,Standard Test Method for Behavior of Materials in a Vertical Tube Furnace at 750Degrees C, 2016a.

ASTM E2652, Standard Test Method for Behavior of Materials in a Tube Furnace with a Cone-shaped Airflow Stabilizer, at 750 Degrees C, 2016.

ASTM F1055, Standard Specification for Electrofusion Type Polyethylene Fittings for OutsideDiameter Controlled Polyethylene and Crosslinked Polyethylene (PEX) Pipe and Tubing, 2013.

ASTM F1733, Standard Specification for Butt Heat Fusion Polyamide (PA) Plastic Fitting forPolyamide (PA) Plastic Pipe and Tubing, 2013.

ASTM F2945, Standard Specification for Polyamide 11 Gas Pressure Pipe, Tubing, and Fittings,2012.



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Date update for ASTM E119 - ASTM E84 has been proposed by another public input to be referenced in the body of the document.ASTM E136 and ASTM E2652 are being added because another public input proposes their use.I have not checked the dates of the other standards



Public Input No. 166-NFPA 58-2017 [Section No. 8.4.2]

Public Input No. 169-NFPA 58-2017 [New Section after 4.7]



Submitter Full Name: Marcelo Hirschler

Organization: GBH International

Street Address:

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Submittal Date: Sun Jun 25 17:00:38 EDT 2017


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2.3.10 UL Publications.

Underwriters Laboratories Inc., 333 Pfingsten Road, Northbrook, IL 60062-2096.

UL 21, Standard for LP-Gas Hose, 2014 2015 .

UL 125, Standard for Flow Control Valves for Anhydrous Ammonia and LP-Gas (Other thanSafety Relief), 2014 2015 .

UL 132, Standard for Safety Relief Valves for Anhydrous Ammonia and LP-Gas, 2015 2016 .

UL 144, Standard for LP-Gas Regulators, 2012, Revised 2014 .

UL 147A, Standard for Nonrefillable (Disposable) Type Fuel Gas Cylinder Assemblies, 2005,Revised 2014 .

UL 147B, Standard for Nonrefillable (Disposable) Type Metal Container Assemblies for Butane,2005, revised 2013 2016 .

UL 263, Standard for Fire Tests of Building Construction and Materials, 2011, Revised 2015 .

UL 514B, Standard for Conduit, Tubing, and Cable Fittings, 2012, Revised 2014 .

UL 567, Standard for Emergency Breakaway Fittings, Swivel Connectors, and Pipe-ConnectionFittings for Petroleum Products and LP-Gas, 2014.

UL 569, Standard for Pigtails and Flexible Hose Connectors for LP-Gas, 2013.

UL 651, Standard for Schedule 40, 80, Type EB and A Rigid PVC Conduit and Fittings, 2016 .

UL 1337, Outline of Investigation for LP-Gas, Natural Gas, and Manufactured Gas Devices forEngine Fuel Systems, 2013 2016 .

UL 1660, Standard for Liquid-Tight Flexible Nonmetallic Conduit, 2014.

UL 1769, Standard for Cylinder Valves, 2015 evsed 2016 .

UL 2227, Standard for Overfilling Prevention Devices, 2007.


Update Standards




Public Input No. 142-NFPA 58-2017 [Section No. N.1.2.14]


Submitter Full Name: Kelly Nicolello

Organization: UL LLC

Street Address:


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Submittal Date: Thu Jun 22 17:01:31 EDT 2017


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2.3.11 ULC Publications.

ULC Stanards , 171 Nepean Street, Suite 400, Ottawa, ON K2P 0B4.

CAN/ULC S642, Standard for Compounds and Tapes for Threaded Pipe Joints, 2007 2016 .


Update Standards








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Public Input No. 4-NFPA 58-2017 [ New Section after 3.2.2 ]

Add new definition of Assembly Occupancy

3.2.3* Assembly Occupancy. An occupancy (1) used for a gathering of 50 or more persons fordeliberation, worship, entertainment, eating, drinking, amusement, awaiting transportation, orsimilar uses; or (2) used as a special amusement building, regardless of occupant load.


The definition is extracted from NFPA 101, Life Safety Code. This term, undefined in NFPA 58, is used in section 6.23.2.3 and in Table 8.3.1(a) and needs to be defined for proper application of the requirements in those references. This is a pre-existing NFPA definition.



Public Input No. 5-NFPA 58-2017 [New Section after A.3.2.3]




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3.3.46 Manifold ASME Container.

An ASME container that consists of two or more interconnected containers that are fabricatedby the original manufacturer and that are connected by rigid, integral, nonremovable liquid andvapor passages, braced to form a single rigid unit, and certified under ASME Section VIII as asingle pressure vessel.


The term is not used in the Code. (It is used in Annex M.)




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Submittal Date: Fri May 19 11:26:31 EDT 2017


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The defined term is not used in the code, so must be deleted.




Public Input No. 85-NFPA 58-2017 [Section No. 12.2]




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3.3.67 Prestart Purge Mode.

A process whereby a mechanical or electromechanical device is used to permit fuel flowthrough the engine supply and return lines, generally on fuel injection systems, to ensure allvapor is removed from the lines prior to engine start.


The term "prestart purge mode" is used only in 12.12.6 (3) (c), and the term is self definiing. A definition is not needed. An explanation can be added to Annex A if committee members believe that the term is needed.




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The defined term is not used in the code, so must be deleted.








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3.3. 71 85.5 Purge Valve.

A mechanical or electromechanical device used to permit fuel flow through the engine supplyand return lines, generally on fuel injection systems, to ensure all vapor is removed from thelines prior to engine start.


Relocate the definition of Purge Valve to 3.3.85, Valve definitions. As a purge vavle is a valve, it's definition should be included with the other types of valve definitions.




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3.3.76 Service Head Adapter.

A transition fitting for use with polyethylene or polyamide pipe or tubing that is recommendedby the manufacturer for field assembly and installation at the aboveground termination end ofan anodeless riser.


The term defined is used in only one paragraph, 5.11.5.7(C). A separate PI has been submitted to revise 5.11.5.7 (C) to incorporate the definition, and the definition is no longer needed.



Public Input No. 64-NFPA 58-2017 [Section No. 5.11.5.7(C)]





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3.3.84 Unibody.

A vehicle with a frame and body that are constructed as a single assembly that does not have aseparate frame on which the body is mounted.


As "unibody" is used only in 12.5.8 (7), and a separate proposal has been submitted to revise 12.5.8(7) to incorporate the definition, a definition is no longer needed in Chapter 12. It is also noted that "unibody" is also defined in 12.2.9 and that a separate proposal has been submitted to delete 12.2.9.









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Public Input No. 167-NFPA 58-2017 [ New Section after 4.7 ]

4.8 Fire resistance rating. Whenever a fire resistance rating is required in this code it shall bedetermined in accordance with ASTM E119, Standard Test Methods for Fire Tests of BuildingConstruction and Materials.


Fire resistance ratings are required in several instances in the code but the information about the test method to be used is found only in 6.8.3.3 and that is not applicable necessarily to the entire code.




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4.9* Noncombustible Material [NFPA 101, 4.6.13]

4.9.1 A material that complies with any of the following shall be considered a noncombustiblematerial:

(1)* A material that, in the form in which it is used and under the conditions anticipated, will notignite, burn, support combustion, or release flammable vapors when subjected to fire or heat

(2) A material that is reported as passing ASTM E136, Standard Test Method for Behavior ofMaterials in a Vertical Tube Furnace at 750 Degrees

(3) A material that is reported as complying with the pass/fail criteria of ASTM E136 when testedin accordance with the test method and procedure in ASTM E2652, Standard Test Method forBehavior of Materials in a Tube Furnace with a Cone-shaped Airflow Stabilizer, at 750 Degrees C[NFPA 101, 4.6.13.1]

A.4.9 The provisions of 4.9 do not require inherently noncombustible materials to be tested inorder to be classified as noncombustible materials. [NFPA 101, A.4.6.13]

A.4.9.1(1) Examples of such materials include steel, concrete, masonry, and glass. [NFPA 101,A.4.6.13.1(1)]


This public input simply adds extracted material from NFPA 101 since NFPA 58 refers in several instances to noncombustible materials.




Public Input No. 168-NFPA 58-2017 [Section No. 6.8.3.3(D)]





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Inspection of Bulk and Industrial Plants

4.8 Inspection of Bulk and Industrial Plants . All Bulk Plants and Industrial Plants shall beinspected by a qualified, independent inspector every 5 years. The inspection shall verify that allcomponents required by the Code are present and operate. A written inspection report shall beretained by the plant or at a central location and shall be made available to the Authority HavingJurisdiction upon request during normal business hours.


A number of safety devices have been required in Bulk and Industrial plants by NFPA 58, such as internal valves, excess flow valves, remote actuation for valves, etc. While these devices have improved safety, it is recognized that safety devices can be temporarily deactivated or bypassed temporarily for operating necessity. While this does not necessarily compromise safety, it is important that a inspections be made to insure that all plants comply with the edition of the Code to which they were constructed, and that all mandated updates have been made.




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Submittal Date: Mon Apr 03 09:03:44 EDT 2017


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4.7 Portable Fire Extinguisher.

Where portable fire extinguishers are required, they shall comply with the following:

(1) NFPA 10

(2)

(3) Shall be permitted to have a minimum agent discharge flow rate less than of at least1 lb/sec (0.45 kg/sec)


The current language within the 2017 edition of the standard conflicts with existing NFPA-10 fire extinguisher requirements specifically identified for properly addressing special class "B" hazards and reduces the equipment performance requirements necessary to effectively extinguish various anticipated fire situations. This proposal resolves those compliance issues and helps clarify proper minimum extinguisher needs.

The following are additional supporting considerations for properly identifying and having the correct portable extinguisher models available:1. Propane storage and filling sites are seldom protected with fire suppression systems or monitored by fire detection and alarm systems.2. Propane cylinder storage sites are often located directly against publically occupied combustible building walls and structures.3. Many propane cylinder storage and filling sites are located in rural or remote locations having extended emergency response times, which further support the need for having the correct extinguisher available to address the various types of incipient fires that might occur near them.4. Public propane cylinder storage cages commonly have various forms of combustible materials stacked or placed directly against them, presenting potential "obstacle" fire extinguishment situations.5. Public propane storage cages are seldom protected from potential vehicle impact damage or criminal actions.6. Propane cylinder storage cages commonly contain cylinders improperly stored upside down, which seriously impair the designed orientation and operation of the safety reliefs.7. Public propane cylinder filling and storage cages are often locked and inaccessible during emergency situations.8. Propane cylinders and safety reliefs are only designed to withstand fire exposures for several minutes, which further reinforce the need for a quick initial response with the correct fire extinguisher.9. Portable fire extinguishers having higher agent flow rates enhance operator effectiveness and additionally compensate for any operator application technique deficiencies that might be presented in emergency fire situations.10. Portable fire extinguishers having higher agent flow rates are specifically intended to address the various special types of class "B" flammable liquid and gaseous fire hazard situations being addressed within the NFPA-58 standard. (Reference NFPA-10 paragraphs 5.5.1, 5.5.2 and 5.5.4 class "B" special fire hazard minimum extinguisher recommendations.)

* Have a minimum capacity of dry chemical with an A:B:C rating, as specified elsewhere inthis code


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Submitter Full Name: J R Nerat

Organization: UTCBadger Fire Protection

Affilliation: Badger/Kiide Fire Protection

Street Address:

City:

State:

Zip:

Submittal Date: Tue Jun 27 18:49:49 EDT 2017


30 of 272 7/12/17, 11:48 AM


Public Input No. 7-NFPA 58-2017 [ Section No. 5.9.3.3 ]

5.9.3.3

Cylinders required to have an overfilling prevention device (OPD) shall not be filled unless theyare equipped with this device and a fixed maximum liquid level gauge. The length of the fixedmaximum liquid level gauge dip tube shall be in accordance with 7.4.3.2(A) or Table 5.9.3.2 .


The first sentence is a filling requirement and not an equipment requirements. Filling requirements are within the scope of Chapter 7, and a separate proposal has been made to add the deleted text to Chapter 7. The second sentence is deleted as it appears in 5.9.3.2 and is not needed twice.



Public Input No. 8-NFPA 58-2017 [New Section after 7.2.2.10]



Organization: TLemoff Enginering

Street Address:

City:

State:

Zip:



31 of 272 7/12/17, 11:48 AM


Public Input No. 176-NFPA 58-2017 [ Section No. 5.9.4.1(B) ]


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(B)


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Cylinders of less than 2 lb 2.7 lb water capacity shall comply with Table 5.9.4.1(B).

Table 5.9.4.1(B) Container Connection and Appurtenance Requirements for Containers Usedin Other Than Bulk Plants and Industrial Plants

Part Appurtenance

1 2 3

≤420 lb 1.2 -420 lb propanecapacity (exceptDOT Spec. 39)

Stationary ASMEcontainers

≤4000 gal water

capacitya

DOT and ASMEengine fuel and

mobile containers

A Vapor shutoff valveb

R

(CGA 555 outletprohibited)

R

R

With internal excess-flow valve

B Liquid shutoff valveb

R

With CGA 555 outletand internal excess-

flow valve

R

With internal excessflow valve

R

With internal excess-flow valve

C Pressure relief valveR

(See 5.9.2.2.)

Rc

[See 5.9.4.1(A).]

R

With full internal orflush-type full internalpressure relief valve

DFixed maximumliquid level gauge

R (filled by volume)

R (filled by weight,

≤40 lb and >100 lb)

R

[See 5.9.4.1(C)(10)]

R

(ASME only)

[See 5.9.4.1(C)(6).]

EOverfilling preventiondevice

R

(4 lb through 40 lb)

(See 5.9.3.)

NR

R

(ASME only)

[See 5.9.4.1(C)(6).]

FActuated liquidwithdrawal excess-flow valve

NR

R

(≥125 gal)

[See 5.9.4.1(C)(3), (4),and (5).]

NR

G Float gauge NR

R

(>124 gal only)NR

HFiller valve [See5.9.4.1(C)(7).]

R

(≥100 lb cylindersthat are filled on siteat the point of use)

R

R

(ASME containersonly)


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For SI units, 1 lb = 0.454 kg; 1 gal = 0.0045 m3.

R: Required. NR: Not required.

aAll ASME container capacities are water capacity.

bWhere installed.

cAboveground ASME containers, internal spring-type pressure relief valves may be used, see5.9.4.1(A), 5.9.4.1(B), and 5.9.4.1(C).


As written, 5.9.4.1 (B) and Column 1 of the table apply to all LP-Gas containers up to 420 lb propane capacity, except for DOT Spec. 39 cylinders. The 2017 edition was revised to except DOT Spec. 39 cylinders “because they were never intended to be included in this table of valve requirements”. Other small cylinders remain in the table that were also never intended to be included, such as butane lighters, cylinders for refilling butane lighters and other open flame devices, and aerosol containers. All these are covered by DOT regulations and have never been considered to be covered by NFPA 58 Table 5.9.4.1 (B), and this revision makes that clear.








Affilliation: Flame King

Street Address:

City:

State:

Zip:



35 of 272 7/12/17, 11:48 AM


Public Input No. 177-NFPA 58-2017 [ Section No. 5.9.4.1(C) ]


36 of 272 7/12/17, 11:48 AM


(C)


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Containers 2 lb larger than 2.7 lb through 4000 gal water capacity shall be fitted with valvesand other appurtenances in accordance with 5.9.8.1, Table 5.9.4.1(B) and the following:

(1) Shutoff, filler, check, and excess-flow valves for ASME containers shall comply withUL 125, Standard for Flow Control Valves for Anhydrous Ammonia and LP-Gas (Other thanSafety Relief).

(2) Shutoff valves used on cylinders larger than 2.7 lb. shall comply with UL 1769, Standardfor Cylinder Valves.

(3) Containers greater than 125 gal through 4000 gal (0.5 m3 through 15.2 m3) water capacityshall be provided with an actuated liquid withdrawal excess-flow valve with a connectionnot smaller than 3⁄4 in. NPT (19 mm), and the container connection shall not be smaller than3⁄4 in. NPT (19 mm).

(4) An actuated liquid withdrawal excess-flow valve shall not be required on containerconnections equipped for liquid withdrawal with a positive shutoff valve that is located asclose to the container as practical in combination with an excess-flow valve installed in thecontainer connection.

(5) The actuated liquid withdrawal excess-flow valve shall not be connected for continuous useunless the valve is recommended by the manufacturer for such service.

(6) An overfilling prevention device shall not be required for engine fuel cylinders used onindustrial (and forklift) trucks powered by LP-Gas or for engine fuel cylinders used onvehicles (including floor maintenance machines) having LP-Gas–powered enginesmounted on them.

(7) A filler valve shall incorporate one of the following:

(8) Double backflow check valves of the spring-loaded type

(9) Manual shutoff valve with an internal backflow check valve of the spring-loaded type

(10) Combination single backflow check valve of the spring-loaded type and an overfillingprevention device designed for containers

(11) Manual shutoff valves in vapor service shall be equipped with one of the following:

(12) An orifice between the container contents and the shutoff valve outlet, not exceeding5 ⁄ 16 in. (8 mm) in diameter, and an approved regulator directly attached, or attachedwith a flexible connector, to the manual shutoff valve outlet

(13) An excess-flow valve

(14) Overfilling prevention devices shall be required on cylinders having 4 lb through 40 lb(1.8 kg through 18 kg) propane capacity for vapor service. (See 5.9.3.)

(15) Cylinders greater than 40 lb through 100 lb (18 kg through 45 kg) propane capacity filled byvolume shall have a fixed maximum liquid level gauge.

(16) Full internal pressure relief valves or flush-type full internal pressure relief valves shall beinstalled in multiple function valves that are used with single opening cylinders used inindustrial truck service and shall have the springs and guiding mechanism on the containerpressure side of the seats, so that the springs and guiding mechanism shall not beexposed to the atmosphere.

(17) Multiple function valves installed on single opening cylinders used in industrial truck serviceshall meet the following requirements:

(a) Cylinders complying with 5.9.2.14 shall have the full internal or flush-type full internal


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pressure relief valve exchanged with a replacement multiple function valve thatincorporates the full internal or flush-type full internal pressure relief valve as describedin 5.9.4.1(C)(11) and 5.9.4.1(C)(12).

(b) The multiple function valve with the full internal or flush-type full internal pressure reliefvalve shall be permitted to have the means to be replaced without removing themultiple function valve from the cylinder.

(c) The multiple function valve shall incorporate an excess-flow valve installed inside thecontainer for the liquid or vapor withdrawal service valve outlet.

(d) The multiple function valve shall incorporate a weak section on the service valve outletconnection.

(e) The multiple function valve shall incorporate an excess-flow valve installed inside thecontainer that shall not restrict the flow to the full internal or flush-type full internalpressure relief valve.

(f) The multiple function valve shall be listed.


(B) is revised to correlate with a change proposed to Table 5.9.4.1 (B) that the table not include DOT cylinders smaller than nominal 1 lb. propane. In the 2017 edition the table was revised to specifically exclude DOT 39 (non-refillable) cylinders. While there are significantly more DOT 39 non-refillable than other cylinders with 1 lb. (nominal) propane capacity, it ignores butane cigarette lighters, cigarette lighter refilling cylinders, and others. The 2.7 pound water capacity limit is already used in several locations in the Code (6.22.1.1 (6), 6.22.2.7, 6.22.3.1, 6.22.3.6, 6.22.5.1 (2), 6.22.5.2, 6.22.9.3, 6.22.11.2, 6.26.7.4, 8.2.1.2, 8.3.2.2, and 8.3.5).

(C) (2) is revised to recognize that UL 1769 was not intended to cover small cylinders (< 2 lb water capacity) which do not incorporate conventional cylinders valves that have a hand wheel and pressure relief valve.



Public Input No. 176-NFPA 58-2017 [Section No. 5.9.4.1(B)]

Public Input No. 176-NFPA 58-2017 [Section No. 5.9.4.1(B)]




Affilliation: Flame King

Street Address:

City:

State:

Zip:



39 of 272 7/12/17, 11:48 AM



5.9.4.3*

ASME containers over 4000 gal (15.2 m3) water capacity shall also be equipped with thefollowing appurtenances and shall comply with Table 5.9.4.2:

(1) A fixed maximum liquid level gauge

(2) A float gauge, rotary gauge, slip tube gauge, other volumetric devices, or a combination ofthese gauges

(3) A pressure gauge

(4) A temperature gauge for aboveground containers only


The existing code in 5.9.4.3 (2) lists three (3) options for determining the liquid level of containers over 4000 gallons. While these options have been utilized for years, there are other devices that can provide liquid level measurement and are more accurate. A strict interpretation of the code would preclude these devices from being used as the sole means of determining liquid level. Paragraph 5.9.5.2 is proposed to be changed in order to match wording of 5.9.4.3 (2).



Public Input No. 122-NFPA 58-2017 [Section No. 5.9.5.2]


Submitter Full Name: Bruce Swiecicki

Organization: National Propane Gas Associati

Affilliation: NPGA TS&S Committee

Street Address:

City:

State:

Zip:



40 of 272 7/12/17, 11:48 AM



5.9.5.2

The gauging devices shall be either fixed maximum liquid level gauges, volulmetric devices orvariable gauges of the slip tube, rotary, or float type (or combinations of such gauges).


The existing code in 5.9.4.3 (2) lists three (3) options for determining the liquid level of containers over 4000 gallons. While these options have been utilized for years, there are other devices that can provide liquid level measurement and are more accurate. A strict interpretation of the code would preclude these devices from being used as the sole means of determining liquid level. Paragraph 5.9.5.2 is proposed to be changed in order to match wording of 5.9.4.3 (2).



Public Input No. 121-NFPA 58-2017 [Section No. 5.9.4.3] Companion Proposal




Affilliation: NPGA TSS Committee

Street Address:

City:

State:

Zip:



41 of 272 7/12/17, 11:48 AM



5.11.1.2

Piping, tubing, fittings, and valves used to supply utilization equipment supply applianceswithin the scope of NFPA 54 shall comply with that code.


Appliance is substituted for "utilization equipment". NFPA 54 defines an appliance as a device that consumes fuel gas, which is what is being referred to here. As these tables are the same as in NFPA 54, the same term should be used.





Public Input No. 180-NFPA 58-2017 [Sections 6.22.3.2, 6.22.3.3, 6.22.3.4]






Affilliation: None

Street Address:

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42 of 272 7/12/17, 11:48 AM



5.11.1.2

Piping, tubing, fittings, and valves used to supply utilization equipment within andappliances within the scope of NFPA 54 shall comply with that code.


The term "utilization equipment has not been used in NFPA 54 for several editions. The terms "appliance" and "equipment" are used for devices that consumes fuel gas and devices other than appliances. When referring to NFPA 54, the appropriate term should bee used.




Affilliation: None

Street Address:

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43 of 272 7/12/17, 11:48 AM



5.11.1.2

Piping, tubing, fittings, and valves used to supply utilization equipment appliances within thescope of NFPA 54 shall comply with that code.


The term "utilization equipment" is no longer used I NFPA 54. It has been replaced by "appliance". As NFPA 54 is referenced it is appropriate to use the correct term.




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5.11.3.1

Pipe shall be wrought iron or steel (black or galvanized), brass, copper, polyamide,polyethylene or polyethylene austenitic stainless steel and shall comply with the following:

(1) Wrought iron: ASME B36.10M, Welded and Seamless Wrought Steel Pipe

(2) Steel pipe: ASTM A53/A53M, Standard Specification for Pipe, Steel, Black and Hot-Dipped,Zinc-Coated, Welded and Seamless

(3) Steel pipe: ASTM A106/A106M, Standard Specification for Seamless Carbon Steel Pipe forHigh-Temperature Service

(4) Brass pipe: ASTM B43, Standard Specification for Seamless Red Brass Pipe, StandardSizes

(5) Copper pipe: ASTM B42, Standard Specification for Seamless Copper Pipe, StandardSizes

(6) Polyamide pipe: ASTM F2945, Standard Specification for Polyamide 11 Gas PressurePipe, Tubing and Fittings, and shall be recommended by the manufacturer for use with LP-Gas

(7) Polyethylene pipe: ASTM D2513, Standard Specification for Polyethylene (PE) GasPressure Pipe, Tubing, and Fittings, and shall be recommended by the manufacturer foruse with LP-Gas

(8) Stainless Pipe: ASTM A312 Standard Specification for Seamless, Welded, and HeavilyCold Worked Austenitic Stainless Steel Pipes.


Marketers & owners of MC331 cargo tank motor vehicles are requesting the use of stainless steel piping, which provides enhanced corrosion resistance. Currently 9.4.3.2 refers you to 5.11.3.1, which has no standard for stainless steel piping. The proposed standard will fill this need.






Organization: National Propane Gas Association

Affilliation: National Propane Gas Association

Street Address:

City:

State:

Zip:


45 of 272 7/12/17, 11:48 AM


Submittal Date: Wed Jun 14 17:09:43 EDT 2017


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5.11.3.1

Pipe shall be wrought iron or steel (stainless, black or galvanized), brass, copper, polyamide, orpolyethylene and shall comply with the following:

(1) Wrought iron: ASME B36.10M, Welded and Seamless Wrought Steel Pipe

(2) Steel pipe: ASTM A53/A53M, Standard Specification for Pipe, Steel, Black and Hot-Dipped,Zinc-Coated, Welded and Seamless

(3) Steel pipe: ASTM A106/A106M, Standard Specification for Seamless Carbon Steel Pipe forHigh-Temperature Service

(4) Brass pipe: ASTM B43, Standard Specification for Seamless Red Brass Pipe, StandardSizes

(5) Copper pipe: ASTM B42, Standard Specification for Seamless Copper Pipe, StandardSizes

(6) Polyamide pipe: ASTM F2945, Standard Specification for Polyamide 11 Gas PressurePipe, Tubing and Fittings, and shall be recommended by the manufacturer for use with LP-Gas

(7) Polyethylene pipe: ASTM D2513, Standard Specification for Polyethylene (PE) GasPressure Pipe, Tubing, and Fittings, and shall be recommended by the manufacturer foruse with LP-Gas

(8) Stainless Steel pipe: ASTM A312/A312M, Standard Specification for Seamless, Welded,and Heavily Cold Worked Austenitic Stainless Steel Pipe

Additional Proposed Changes

File Name Description Approved

Code_Change_Request.pdf


Stainless steel piping has become more affordable and popular to use in bulk plant installations. NFPA 58 currently does not recognize stainless steel specifically as an approved material that can be used in piping. NFPA 58 1.5.1 has been utilized in different jurisdictions to approve the use of stainless steel, but some jurisdictions would be more comfortable with stainless steel if it was specifically mentioned in future editions of NFPA 58. Stainless steel has many advantages over black steel. Some of these include a higher max PSI, tensile strength, temperature resistance, corrosion resistance, life expectancy, lower maintenance costs, and aesthetics.


Submitter Full Name: Kevin Eardley

Organization: Propane Equipment & Supply

Street Address:

City:


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State:

Zip:

Submittal Date: Wed May 31 13:06:16 EDT 2017


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(C)

Field-assembled anodeless risers with service head adapters shall adapter transitionfittings shall be equipped with moisture seals and shall be recommended for LP-Gas use by themanufacturer for installation at the aboveground termination of the riser .


This is the only code requirement that uses the term "service head adapter". The paragraph is revised to incorporate the definition of "service head adapter" and deletion of the definition is proposed in another PI.








Affilliation: None

Street Address:

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49 of 272 7/12/17, 11:48 AM



5.11.6.6

Hoses or flexible connectors used to supply LP-Gas to utilization equipment or appliances shallbe installed in accordance with the provisions of 6.11.6 and 6.23.4.


The term "utilization equipment" as used in the paragraph means that the requirement applies to equipment that consumes LP-Gas, such as appliances, but not to equipment that does not consume LP-Gas, such as a strainer pressure regulator. Deleting "utilization" will ensure that the requirement is applied to all hose uses.

The term 'utilization equipment" was used in NFPA 54 at one time, along with appliance and gas utilization equipment, all meaning a device that consumes fuel gas. The term was changed to appliance, specifically a device that consumes gas, and the term equipment was clarified to mean a device that handles fuel gas but does not consume the fuel gas. As many users of NFPA 58 also use NFPA 54, the terms should not conflict.




Affilliation: None

Street Address:

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50 of 272 7/12/17, 11:48 AM


Public Input No. 9-NFPA 58-2017 [ New Section after 5.14.2.2 ]

TITLE OF NEW CONTENT

5.14.2.3 Excess flow check valves shall have a flow capacity greater than the rated flow ofthe piping system they are installed in.


Currently 5.9.8.1 (H) provides sizing criteria for excess flow valves installed as container appurtenances. Paragraph 5.14.2.2 makes requires that manual shutoff valves in piping systems meet the same requirements as excess flow valves installed as container appurtenances, and states “(see 5.9.4)”. As 5.9.4 does not establish flow requirements for excess flow valves in piping systems the reader can assume that there are no flow requirements.

This proposal remedies this by adding a paragraph that specifically addresses excess flow valves in piping systems.




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51 of 272 7/12/17, 11:48 AM



6.4.1.2

When the provisions of 6.30.3 through 6.30.5 are met, the minimum distance from an ASMEcontainer to a building or adjoining property line that can be built upon shall be reduced by

one-half for ASME containers of 2001 gal through 30,000 gal (7.6 m3 through 114 m3) watercapacity.


If a building can be placed at 25 feet there is no reason to have a different separation for the property line.


Submitter Full Name: N Haldeman


Street Address:

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52 of 272 7/12/17, 11:48 AM



6.4.3 Minimum Separation Distances for ASME Containers. Multiple Containers Less Than125 Gallons Individual Water Capacity

6.4.3.1

The minimum separation distances specified in

Multiple containers, each having a water capacity less than 125 gallons and installed in anaboveground group as a manifolded single service or as individual services, shall comply withthe following:

(A) Where the aggregate water capacity of all containers in any group is 500 gallons or less,the minimum separation distances required by Table 6.4.1.1

between containers and buildings of noncombustible construction devoted exclusively to gasmanufacturing and distribution operations shall be reduced to 10 ft (3 m).

6.4.3.2

If the aggregate water capacity of a multicontainer installation is 501 gal (1.9 m 3 ) or more andthe installation is comprised of individual containers, each with a water capacity of less than

125 gal (0.5 m 3 ), the minimum distance shall comply with

for each container shall be zero (0) feet for each container in the group from an importantbuilding or line of adjoining property that can be built upon.

(B) Where the aggregate water capacity of all containers in the group is greater than 500gallons, the minimum separation distances in Table 6.4.1.1

and 6.4.3.2(A) through

for each container shall be based on the aggregate capacity.

(C) There shall be no separation required between individual containers within the group.

(D)* For the application of 6.4.3.

2

1 (

C).

(A)

The aggregate capacity shall be used rather than the capacity per container.

(B)

If more than one such installation is made, each installation shall be separated from any otherinstallation by at least 25 ft (7.6 m).

(C)

The minimum distances between containers shall not be applied to installations covered by6.4.3.2 .

A) and (B), the number of containers in a single group is determined by the number ofcontainers that are less than 10 feet from any other container in the group.


53 of 272 7/12/17, 11:48 AM



The section title was changed and therefore it was necessary to move current 6.4.3.1, which addresses gas manufacturing and distribution operations, into the more general Section 6.5.3.

The proposed text clarifies the intent of this section and in fact makes it more restrictive in that it would clearly apply to not only manifolded containers, but also to or multiple individual container installations. The term “aggregate” will include containers that are not necessarily connected to one another, but that are located from one another a distance that is within the minimum separation distance required between containers in Table 6.4.1.1. This criterion was established when the Fire Safety Analysis Manual was co-published by NFPA, NPGA and PERC to address the requirements for a fire safety analysis in the 2001 edition of NFPA 58.

NPGA proposes to establish 10 feet as the threshold separation distance that will be used to distinguish between groups of containers. The current requirement of 25 feet between groups is considered too restrictive as it would force groups of containers that are less than 25 feet from one another to be treated as aggregate capacity, therefore requiring them to be installed at least 25 feet from the building. The proposed 10-foot separation requirement is actually more restrictive than what Table 6.4.1.1 requires for a minimum separation between individual containers of much larger sizes. For example, the current code would permit an unlimited number of 500 gallon containers to be placed 3 feet of one another but only 10 feet from a building.

This proposal and its companion proposal include drawings for use in Annex A that will establish requirements that are more clearly stated and more easily interpreted.



Public Input No. 187-NFPA 58-2017 [New Section after A.6.4.1.1]





Affilliation: NPGA Technology, Standards and Safety Committee

Street Address:

City:

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54 of 272 7/12/17, 11:48 AM



6.5.3.14

The minimum separation distances specified in Table 6.4.1.1 between containers and buildingsof noncombustible

construction devoted exclusively to gas manufacturing and

distribution operations shall be reduced to 10 ft (3 m).


The section title was changed and therefore it was necessary to move current 6.4.3.1, which addresses gas manufacturing and distribution operations, into the more general Section 6.5.3.



Public Input No. 186-NFPA 58-2017 [Section No. 6.4.3] Companion Change





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55 of 272 7/12/17, 11:48 AM



6.5.4* Structure Requirements.

6.5.4.1 *

Structures such as fire walls, fences, earth or concrete barriers, and other similar structuresshall not be permitted around or over installed nonrefrigerated containers unless specificallyallowed.

6.5.4.2

Structures partially enclosing containers shall be permitted if designed in accordance with asound fire protection analysis in accordance with all of the following:

(A) 36-inch minimum clearance shall be provided around the container for inspection andmaintenance.

(B) The container is not enclosed for more than 50% of its perimeter.

(C) The entire top of the container can be wetted by an emergency response hose stream .

6.5.4.3

Structures used to prevent flammable or combustible liquid accumulation or flow shall bepermitted in accordance with 6.5.3.4 .

6.5.4.4

Structures between LP-Gas containers and gaseous hydrogen containers shall be permitted inaccordance with 6.5.3.10 .

6.5.4.5

Structures such as fences shall be permitted in accordance with 6.21.4 .


The change to 6.5.4.1 is to re-write the requirement in a positive manner that also provides specific criteria by which an installation can be evaluated. This will reduce some ambiguity and result in more uniform enforcement of this section. The minimum 36-inch clearance was decided upon based on expected clearances required to paint and maintain the container.

The term “sound fire protection analysis” is proposed for deletion due to questions raised by an enforcement authority. The term is not defined and very subjective, which can lead to non-uniform enforcement.

The minimum 50% non-enclosure criterion was determined to be adequate to allow for the dispersion of any unburned LP-gas vapor that may be present during the filling operation.





Street Address:


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57 of 272 7/12/17, 11:48 AM



ASME containers that have liquid interconnections shall be installed so that themaximum permitted filling level of each container is at the same elevation.


This requirement is presently under the heading of 6.8.3, Installation of Horizontal Aboveground ASME Containers. I can find no equivalent statement prohibiting interconnecting AG and UG tanks. Common sense says don’t even think about it. However, we received a plan for installation of an AG 30,000-gallon tank to a site that already has an UG 30,000-gallon tank, with the stated intent to interconnect the liquid openings. The code has no prohibition of doing this with the requirement placed in the section for AG ASME containers. The risk of having liquid interconnections between tanks where the maximum permitted filling level is different is clearly addressed by 6.8.3.2. It applies to only horizontal aboveground ASME containers because of its location in the section titled 6.8.3 Installation of Horizontal Aboveground ASME Containers. It needs to apply also to sites where an underground container might be connected to an aboveground container. The requirement of 6.8.3.2 does not apply to this possible AG/UG combination unless it is relocated into section 6.8.1, general requirements for installation of containers. This requirement is identical to the requirement in 6.8.3.2, except that placing it here allows it to be applied to an installation where AG and UG tanks are located.







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58 of 272 7/12/17, 11:48 AM



6.8.3.2

ASME containers that have liquid interconnections shall be installed so that the maximumpermitted filling level of each container is at the same elevation.


This requirement is under the heading of 6.8.3, Installation of Horizontal Aboveground ASME Containers. I can find no equivalent statement prohibiting interconnecting AG and UG tanks. Common sense says don’t even think about it. However, we received a plan for installation of an AG 30,000-gallon tank to a site that already has an UG 30,000-gallon tank, with the stated intent to interconnect the liquid openings. The code has no prohibition of doing this with the requirement placed in the section for AG ASME containers. The risk of having liquid interconnections between tanks where the maximum permitted filling level is different is clearly addressed by 6.8.3.2. It applies to only horizontal aboveground ASME containers because of its location in the section titled 6.8.3 Installation of Horizontal Aboveground ASME Containers. It needs to apply also to sites where an underground container might be connected to an aboveground container. The requirement of 6.8.3.2 does not apply to this possible AG/UG combination unless it is relocated into section 6.8.1, general requirements for installation of containers. There is a related PI to add the current requirement to section 6.8.1, so that it applies to all installations of ASME containers.







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59 of 272 7/12/17, 11:48 AM


Public Input No. 168-NFPA 58-2017 [ Section No. 6.8.3.3(D) ]

(D)

Horizontal ASME containers of 4000 gal (15.2 m3) or less, on foundations in their installedcondition, shall meet the following conditions:

(1) Structurally support the containers when subject to deteriorating environmental effectsincluding, but not limited to, ambient temperature of −40°F to 150°F (−40°C to 66°C) orlocal conditions if outside this range, ultraviolet rays, radiant heat from fires, and moisture

(2) Be of either noncombustible material (per 4.9) or self-extinguishing material (per thedefinition in NFPA 99, 3.3.149)


Simple clarification. NFPA 99 section 3.149 defines a self extinguishing material and a description of what constitutes a "noncombustible material", per NFPA 101 or NFPA 5000, is proposed to be added to chapter 4 into a new section 4.9.







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60 of 272 7/12/17, 11:48 AM


Public Input No. 30-NFPA 58-2017 [ Section No. 6.8.3.6 [Excluding any Sub-

Sections] ]

In locations above 5000' elevation where the snow depth

, based on the ground snow load, is more than the height of aboveground containers, excludingthe dome coveris above the top of the dome of an above ground tank or above the lid of an underground tankmore , both of the following requirements shall apply:

A stake or other marking shall be installed higher than the snow depth based on the groundsnow load.

(1) LPG tanks, above and below ground, shall be marked by the use of snow stakes. Such stakes shall beof sufficient height to rise above the anticipated snow depth. Snow stakes shall be yellow in color andwill be placed on the side of the tank opposite the riser for above ground tanks; underground tank stakesshall be placed as close as reasonably possible to the tank or as approved by the permitting authority. Thetop six inches of the snow stake shall be painted in the supplier’s designated color as determined by thepermitting authority; underground tank stakes shall be marked “UG” in this same top six inches. The sideof the stake indicating the tank location will be painted a minimum of eighteen (18) inches and will beopposite the shutoff valve on the propane storage tank. The stake shall additionally be marked “red”beginning at the top of the tank and for twelve (12) continuous inches above the tank as tank warningindicator, or as may be approved by the permitting authority. Snow stakes shall be installed no later thanNovember 1st of each year and shall remain in place continuously. ”

(2) The container shall be installed to prevent its movement resulting from snow accumulation.


In areas above 5000' elevation where there can be extreme snow years the orientation and painting of the stake tells anyone looking at the stake where and how the tank is oriented. As the code is currently written you have no idea on which side of the stake the tank is located. In our case we worked with Placer County CA to revise their code to require what I have proposed. This has helped first responders easily locate the tank when excavating 20 feet of snow to find a leak.


Submitter Full Name: Ed Bubnis

Organization:

Affilliation: Serene Lakes Property Owners Association

Street Address:

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Submittal Date: Wed Apr 05 12:23:15 EDT 2017


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6.9.2.3

Pressure relief devices on the following ASME containers shall be so installed that any gasreleased is vented upward and away from the container upward and unobstructed to the openair :

(1) Containers of 125 gal (0.5 m3) or more water capacity installed in stationary service

(2) Portable storage containers

(3) Portable tanks

(4) Cargo tanks


The term “unobstructed” may be ambiguous and due to the large number of variables and conditions that could exist, such as the use of canopies and other structures, the term is too ambiguous to enforce.

The term “open air” may also be ambiguous because there is no defined volume or distance above the valve that would clearly indicate what is considered to be “open.” Removing that term will simplify the understanding and enforcement of this provision. Since all relief valves “vent” to the atmosphere, there is no reason to specify “open air.”

There have been no reported incidents due to relief valve discharge being diverted by structures.







Affilliation: NPGA Technology and Standards Committee

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6.9.2.3

Pressure relief devices on the following ASME containers shall be so installed and thecontainer so installed that any gas released is vented away from the container upward andunobstructed to the open air:

(1) Containers of 125 gal (0.5 m3) or more water capacity installed in stationary service

(2) Portable storage containers

(3) Portable tanks

(4) Cargo tanks

(5)


Cargo tanks should be removed from this section because USDOT has the jurisdiction for determining the installation requirements for relief valves on cargo tanks.The additional language for installing the container is to ensure that the relief valve discharge is not restricted from dispersion. The possibility exists that any cover over the relief valve would cause the discharged product from the relief valve to be redirected to the ground, where is could form a combustible concentration, endangering any person in the area or where it might engulf the tank in flame. There is a proposed research study by the Fire Protection Research Foundation to conduct research on the effects of diverting or redirecting the discharge of a relief valve. The findings of this research may be available for use at the comment stage of NFPA 58 to refine this requirement.




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6.9.2.7

Pressure relief valve discharge on each container of more than 2000 gal (7.6 m 3 ) watercapacity shall be directed vertically upward and unobstructed to the open air.


The deletion of 6.9.2.7 is necessary since 6.9.2.3 already addresses the relief valve discharge. Therefore, 6.9.2.7 is redundant.



Public Input No. 190-NFPA 58-2017 [Section No. 6.9.2.3] Companion Change




Affilliation: NPGA Technology, Safety and Standards Committee

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6.11.2.2

LP-Gas vapor piping systems shall be sized and installed to provide a supply of gas to meet themaximum demand of all gas utilization equipment appliances using Table 16.1(a) throughTable 16.1(p), engineering methods, or sizing tables included in a piping system manufacturer'sinstallation instructions.


Appliance is substituted for "utilization equipment". NFPA 54 defines an appliance as a device that consumes fuel gas, which is what is being referred to here. As these tables are the same as in NFPA 54, the same term should be used.











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Public Input No. 99-NFPA 58-2017 [ Section No. 6.11.3.5(A) ]

(A)

Metallic threaded, welded, press-connected, and brazed pipe joints shall be in accordance withTable 6.11.3.5(A).

Table 6.11.3.5(A) Types of Metallic Pipe Joints in LP-Gas Service

Service Schedule 10 Schedule 40 Schedule 80

Liquid Welded or brazed Threaded, welded, or brazed Vapor, ≤125 psig

(≤0.9 MPag) Threaded, welded, press-connected, or brazed Threaded, welded, orbrazed Vapor, ≥125 psig

(≥0.9 MPag) Welded or brazed Threaded, welded, or brazed

See Word Document attachment for table



NFPA_58_Proposed_Table_6.11.3.5_A_.docx Proposed Table 6.11.3.5(A)


The schedule 40 restriction was in place to safely accommodate threading of pipe. Allowingschedule 10 acknowledges different pipe joining methods.The revision will allow Schedule 10 pipe to be used for gas piping for utilization equipment. Schedule 10 pipehas a thinner wall than Schedule 40 and therefore is lighter and has a higher gas flow than Schedule40.Schedule 10 pipe is currently allowed for fuel gas piping at pressures above 125 psig by ASMEB31.1, Power Piping. As it is allowed for higher pressure than covered by the scope of the NationalFuel Gas Code there is technical reason to not allow the material in NFPA 58. Due to the thinner wallof Schedule 10 pipe it cannot be threaded, and must be joined by other methods such as pressconnect fittings, welding, or brazing.Schedule 10 pipe, while thinner than Schedule 40, has sufficient strength to withstand damageduring installation. It should be sufficiently robust to not be dented, pinched, or punctured in normalinstallations in buildings. Because of the thinner wall, the inside diameter of Schedule 10 pipe isgreater than Schedule 40. This results in a higher gas flow capacity of approximately 6 %. Thecurrent Schedule 40 pipe sizing tables can be used or a note can be added to the table to allow flowto be increased by 6% where Schedule 10 is used.The existing table of pipe hanger spacing can be used for Schedule 10 pipe as the pipe is lighterthan Schedule 40 pipe.

Press-Connect fittings may be used on Schedule 80 pipe as allowed by manufacturer and should the addition of press-connect fittings for vapor services 125 psig or less addresses this technology.



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Submitter Full Name: Mark Fasel

Organization: Viega LLC

Affilliation: Viega LLC

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6.11.3.11 Aboveground piping shall be protected against physical damage by vehicles.


The current requirement violates the Manual of Style by having two requirements in the same paragraph. This proposes to separate them. Additionally, it includes wording to provide some performance requirement for how to support the piping.The requirement to protect the piping from damage by vehicles must not limit the vehicles to on-road vehicles. The BLEVE of a large tank in Iowa, where the piping was struck and broken by an ATV, and an incident in North Carolina where a tractor ran over some piping obscured by weeds, breaking the pipe and causing burn injuries to the tractor operator, demonstrate that piping is vulnerable to off-road vehicles.



Public Input No. 2-NFPA 58-2017[Section No. 6.11.3.10]

Currently one section with two requirements.Separating requirements.




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6.11.3.10

Aboveground piping shall be supported and protected against physical damage by vehicles toensure integrity of the piping .


The current requirement violates the Manual of Style by having two requirements in the same paragraph. This proposes to separate them. Additionally, it includes wording to provide some performance requirement for how to support the piping.







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6.11.5.3

Valves shall be manufactured from thermoplastic materials fabricated from materials listed inASTM D2513, Standard Specification for Polyethylene (PE) Gas Pressure Pipe, Tubing, andFittings, that have been shown to be resistant to the action of LP-Gas, or from metals protectedto minimize corrosion in accordance with Section 6.19.


Since polyamide 11 materials are permitted for use in LP Gas piping components, and since ASTM D2513 was changed in 2009 to a polyethylene, ONLY, we need to reference the polyamide 11 gas piping specification to specify the polyamide material from which polyamide valves can be constructed. Additionally referencing F2945 accomplishes this correction.


Submitter Full Name: Frank Volgstadt

Organization: Volgstadt & Associates, Inc.

Affilliation: Arkema

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Submittal Date: Wed Feb 15 15:31:26 EST 2017


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Public Input No. 87-NFPA 58-2017 [ Section No. 6.15 [Excluding any Sub-

Sections] ]

A hydrostatic relief valve or a device providing pressure-relieving protection shall be installed ineach section of piping and hose in which liquid LP-Gas can be isolated between shutoff valvesand/or backflow check valve(s) , so as to relieve the pressure that could develop from thetrapped liquid to a safe atmosphere or product-retaining section.


For example: Consider the typical piping arrangement of a bulk plant at the transport offload area, specifically the piping downstream (towards the tank) from the backflow check valve at the bulkhead and the next shutoff valve in the line. When the shutoff valve is closed, the liquid between the shutoff valve and the bfcv is trapped. This section of piping requires a hydrostatic relief valve.


Submitter Full Name: Donald Jones


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Submittal Date: Sun May 21 15:49:00 EDT 2017


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6.18.1*

In areas where the ground snow load is equal to or exceeds 100 psf (488 kgf/m 2 ) above 5000'elevation , piping, regulators, meters, and other equipment installed in the piping system shallbe protected from the forces of accumulated snow.

(1) In these areas non rated stuctures built from wood or other materials shall be allowed to beconstructed over or around tanks to allowed installations to be compliant with the paragraphabove. These structures shall be designed to withstand snowload forces.



Location_of_leaking_tanks.pdf Photos of tanks that leaked this winter

Location_of_leaking_tanks.pdf Photos of structures that property owners have built

Propane_Tank_Enclosures_1.pdf Analysis of a Non-Rated Propane Tank Enclosure


The existing code requires protection, however while owners have built structures that do provide some level of protection we believe, as does Truckee Fire Protection District, that they are not allowed under the current NFPA code. Truckee Fire however has not required their removal. During the Placer County code revision project after the winter of 2010/2011 where we had over 40 leaks and one home burn to the ground, one fire official said, "I would rather fight a tank structure fire than to try and find a leaking tank under 20' of snow," which was the case in 2010/2011.

We believe that allowing these types non rated structures over tanks and piping in areas above 5000' elevation provides a level of safety that is presently not allowed but required under the current code.


Submitter Full Name: Ed Bubnis

Organization:

Affilliation: Serene Lakes Property Owners Association (SLPOA)

Street Address:

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Submittal Date: Fri Apr 07 14:05:26 EDT 2017


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Location of leaking tanks.

Summer photo of tanks



6.19.3.2*

Sacrificial anodes shall be tested in accordance with the following schedule.

(1) Upon installation of the cathodic protection system, unless prohibited by climatic conditions,in which case testing shall be done within 180 30 days after the installation of the system.

(2) For continued verification of the effectiveness of the system, 12 to 18 months after theinitial test.

(3) Upon successful verification testing and in consideration of previous test results, periodicfollow-up testing shall be performed at intervals not to exceed 36 months.

(4) any underground propane tank and it's piping system, that is under cathodic protectionmust be systematically tested at least once a year.

(5) Testing should be performed by an experienced technician.

(6) Systems failing a test shall be repaired as soon as practical unless climatic conditionsprohibit this action, in which case the repair shall be made not more than 180 daysthereafter. The testing schedule shall be restarted as required in 6.19.3.2(1) and6.19.3.2(2), and the results shall comply with 6.19.3.2.

(7) Documentation of the testing results of the two most recent tests shall be retained.


Annual testing should be adopted to help avoid extensive damage to buried tanks and lines.

A CP inspection is the only way to verify sacrificial anode systems are working properly. Sacrificial systems rely on buried anodes to prevent corrosion. These anodes are attached to the buried steel and over time lose their connection or have lower energy output. Because there are no meters to indicate that the system is working properly, an inspection is the only way to determine the anodes that need to be reconnected or replaced. Sacrificial anode CP does not have any component that will indicate whether the system is functioning. This is why periodic CP inspections are extremely important. Although many states require a CP inspection every 3 years, annual testing should be adopted to help avoid extensive damage to buried tanks and lines. Although impressed current systems have meters to indicate that electricity is passing through, the meter cannot determine whether sufficient power exists to prevent corrosion. A CP inspection is the only way to check whether energy output of every component is sufficient and to identify any parts that needed to be reconnected to the system.

Is wiring exposed on the system?

As an experienced corrosion technician and with experience working in the propane idustry, I have seen underground tanks that are no longer protected due to a broken wire. By having the requirement changed to annually, checks can be made around the tanks for any broken or disconnected wires.There is a good chance these wires belong to the CP system. A broken wire could cause part of the system to malfunction and indicate the system is not providing protection against corrosion.

Annual CP testing and keeping accurate CP records will save money because it:


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extends the life of the CP system. keeps you in compliance with state regulations. prevents corrosion damage to buried tanks and lines.

Why is Cathodic Protection Important and What is it:

Safety is the number one reason for cathodic protection. A system that is isn’t protected could develop leaks due to the corrosion process. Any escaping propane will travel the least resistive path to make its way into the atmosphere. It could follow the path of the line from the tank to the home, where the dangers of it igniting, and causing damage to life and or property, exist.

Corrosion is a natural process, which converts a refined metal to a more chemically-stable form, such as oxide, hydroxide, or sulfide. It is the gradual destruction of materials (usually metals) by chemical and/or electrochemical reaction with their environment. So Underground propane tanks corrode due to an electrochemical reaction between the tank and the surrounding soil.

The purpose of cathodic protection is to provide an increased level of corrosion protection for the underground tank. Corrosion exhibits itself on underground tanks by overall rusting or more commonly by pitting. There are many things that can effect or accelerate the corrosion process, such as moisture concentration, oxygen concentration, rocks, fertilizers, salt, ect.

Preventing corrosion is achieved by two methods:

External coating and cathodic protection, both methods are complimentary and should be used together. An effective coating insulates the tank from the environment preventing the corrosion process. However, no coating is perfect. The coating can become damaged during the construction process and or soil stresses, such as settling can cause tiny defects, which may result in accelerated corrosion at the defect.

Cathodic protection prevents corrosion at those defects by applying DC current from an external source, such as a sacrificial anode, forcing the tank to become a cathode. This method is the most common method for underground propane tanks. You can think of a cathode and an anode like a battery, the cathode attracts + charge. The anode attracts negative charge. The corrosion is thus attracted to the anode thereby protecting your underground tank.


Submitter Full Name: matthew dobyns

Organization: Bobs LP Gas

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Submittal Date: Thu Apr 27 17:38:33 EDT 2017


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6.21.4 Security and Protection Against Tampering for Section 6.19 21 and Section 6.25 27Systems.

6.21.4.1

The following security measures shall be provided to minimize the possibility of entry byunauthorized persons:

(1) Security awareness training

(2) Limitation of unauthorized access to plant areas that include container appurtenances,pumping equipment, loading and unloading facilities, and container filling facilities

6.21.4.2

Areas that include features required in 6.21.4.1(2) shall be enclosed with a minimum 6 ft(1.8 m) high industrial-type fence, chain-link fence, or equivalent protection.

(A)

The enclosure shall have at least two means of emergency egress, unless all the followingconditions are met:

(1) The fenced or otherwise enclosed area is not over 100 ft2 (9 m2).

(2) The point of transfer is within 3 ft (1 m) of the gate.

(3) Containers are not filled within the enclosure.

(B)

The two means of emergency egress, where required, shall be at least 25 ft (7.6 m) apart or asremotely located as is practical.

(C)

Clearance of at least 3 ft (1 m) shall be provided to allow emergency access to the requiredmeans of egress.

(D)

Fencing shall not be required where devices are provided that can be locked in place andprevent unauthorized operation of valves, equipment, and appurtenances.

6.21.4.3

Where guard service is provided, it shall be extended to the LP-Gas installation, and therequirements of Section 4.4 shall apply to guard personnel.


This change was not made from the text in the 2014 to the 2017 edition to correctly show the changes to the section numbers involved. There may also have to be additional changes if sections are added during the 2020 edition change process.



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Submittal Date: Wed Mar 22 13:43:19 EDT 2017


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(B)

The two means of emergency egress, where required, shall be at least 25 ft (7.6 m) apart or asremotely located as is practical. Where padlocks are installed on the fence gates or othermeans of emergency egress, the padlocks shall be keyed alike. Where the padlocks are thecombination type, the padlocks shall unlock with the same combination.


When a new system is installed, both/all locks are keyed alike. Most systems are usually accessed through a primary gate, and the other gate(s) is commonly referred to as the “secondary or rear” gate. Both gates should be unlocked during any operations within the fenced area; however, many times this important guideline is ignored. When the primary lock is lost or it becomes inoperable or its key goes missing, many times only the primary lock is replaced, and the new lock is keyed differently than the remaining lock on the secondary/rear gate. By requiring that both/all gates be keyed alike, workers will have a fighting chance to exit the fenced area via the alternate egress if/when an incident occurs. At least, he or she will have the correct key or know the correct lock combination to exit the area.


Submitter Full Name: Donald Jones


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Submittal Date: Mon Feb 27 20:40:46 EST 2017


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Public Input No. 180-NFPA 58-2017 [ Sections 6.22.3.2, 6.22.3.3, 6.22.3.4 ]

Sections 6.22.3.2, 6.22.3.3, 6.22.3.4

6.22.3.2

Cylinders, regulating equipment, manifolds, pipe, tubing, and hose shall be located to minimizeexposure to the following:

(1) Abnormally high temperatures (such as might result from exposure to convection andradiation from heating equipment appliances or installation in confined spaces)

(2) Physical damage

(3) Tampering by unauthorized persons

6.22.3.3

Heat-producing equipment appliances shall be installed with clearance to combustibles inaccordance with the manufacturer's installation instructions.

6.22.3.4

Heat-producing equipment appliances shall be located and used to minimize the possibility ofthe ignition of combustibles.


Appliance is substituted for "equipment". NFPA 54 defines an appliance as a device that consumes fuel gas, which is what is being referred to here. As these tables are the same as in NFPA 54, the same term should be used.










Affilliation: None

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6.22.6.3

The use of cylinders to supply fuel for temporary heating shall be permitted only where aportable equipment appliance for space heating is essential and a permanent heatinginstallation is not practical.











Organization: Tlemoff Engineering

Affilliation: None

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6.22.8.1

Cylinders shall not be used in buildings for temporary emergency heating purposes exceptwhen all of the following conditions are met:

(1) The permanent heating system is temporarily out of service.

(2) Heat is necessary to prevent damage to the buildings or contents.

(3) The cylinders and heaters comply with, and are used and transported in accordance with,6.22.2 through 6.22.4.

(4) The temporary heating equipment appliance is not left unattended.

(5) Air for combustion and ventilation is provided in accordance with NFPA 54.












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6.27.3.4 For a location where the requirement for not being enclosed for more then 50 percentof its perimeter in section 6.27.3.3 is not strictly met, an enclosure not more than 6 ft (1.8 m) in

height from ground level and exceeding 5000 ft 2 (465 m 2 ) shall meet the intent of section6.27.3.3.


There exist some dispensing systems that are completely enclosed by solid fencing in a very large enclosure. These situations do not strictly meet the requirement of section 6.27.3.3 and could be cited as being in violation by AHJs. The practical effect of such a large enclosure is that they are not limiting the dispersion of released product. This will give guidance to the AHJ for sites that are enclosed but do not pose a serious threat of having a flammable mixture.




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6.27.3.3

Where

The area where a vehicle fuel dispenser or dispensing system is

installed under a weather shelter or canopy, the area

located shall be ventilated and shall not be enclosed for more than

50 percent

50 percent of its perimeter. A weather shelter or canopy may cover the working space for thefilling operation.


With the new definition for dispensing system (3.3.22) in the 2017 edition, the present wording in 6.27.3.3 allows the working space for the filling operation and the container to be under a cover. This would conflict with sections 6.5.4 and 6.9.2.3. There is a need for all transfer areas, covered or not, to have ventilation to aid in the dispersion of released product. As the code is written now, fuel transfer, even with bleed valve venting, could be performed in a place with a solid wall or fence of indeterminate height. However, a container would not be allowed in this walled area unless it met the requirements of 6.5.4. Some form of restriction from enclosure is needed for dispensing areas not under a cover. While this may appear to be two requirements, it is really one requirement that is accomplished by two interrelated statements.

Revising 6.27.3.3 this way and keeping 6.7.1.2 will still allow filling of containers under a cover, but clearly show the need for providing a place with ventilation. The second sentence could, instead, be annex material.




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(B)

Equivalent protection in lieu of guard posts shall be a minimum of 3 ft (900 mm) in height andshall resist a force of 6000 lb (53,375 N) applied 3 ft (900 mm) above the adjacent groundsurface Barriers, other than the posts specified in 6.27.3.13 (A), that are designed to resist,deflect or visually deter vehicular impact commensurate with an anticipated impact scenarioshall be permitted where approved .


The provisions in 6.27.3.13 (B) can not be met. It is not a performance standard. There is no velocity associated with the 6,000 pound force. The term resist is also not defined. What does resist mean? Is any deflection or movement from the barrier considered resistance?

Changing 6.27.3.13 (B) to "Barriers, other than the posts specified in 312.2, that are designed to resist, deflect or visually deter vehicular impact commensurate with an anticipated impact scenario shall be permitted where approved."

This will also make NFPA 58 in sync with the 2015 IFC code 312.3 on VBP for dispensers.


Submitter Full Name: Kevin Eardley

Organization: Propane Equipment & Supply (PES)

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6.28.3

Where containers for stationary engines have a fill valve with an integral manual shutoff valve,the minimum separation distances shall be one-half of the distances specified inSection determined by Table 6.4 .1.1 and Table 6.4.4.3.


The problem is not maintaining a minimum distance of separation between a source if ignition and the relief valve discharge. The change would allow the 2 tables to determine separation distances. This code is at a minimum distance, if you have ever witnessed a relief valve discharge you would extend the distance to a minimum of 15' from a source of ignition NO Exceptions.


Submitter Full Name: Jeffrey Farnsworth

Organization: Commercial Mechanical Service,Inc.

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6.28.3

Where containers for stationary engines have a fill valve with an integral manual shutoff valve,the minimum separation distances required for fill valves shall be one-half of the distancesspecified in Section 6.4.


This requirement was added to allow closer spacing of containers for stationary engines when they are in tight quarters with other stationary engines. The idea was that the person filling the tank could control an unintended release from the fill valve when the fill hose was removed with the always-present manual shut-off. That makes the filling operation safer but makes no changes at all to relief valve discharge safety. As such, use of the special filler valve should be applied only to fill valve separation requirements but not to relief valve separation requirements. This will still allow installation of these tanks closer than would otherwise be allowed.




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6.30.1 Application.

Section 6.30 shall apply to alternate provisions for the location and installation of ASMEcontainers that incorporate the use of redundant fail-safe product control measures and low-emission transfer concepts and to the filling of certain DOT cylinders using low-emissiontransfer concepts for the purpose of enhancing safety and to mitigate distance and specialprotection requirements.


The current requirements for low emission transfer are limited to filling of only ASME containers. There is a desire in the industry to fill cylinders using low emission transfer and to claim the reduced separation distance requirements allowed for filling ASME containers. This would allow installation and use of dispensers on sites that otherwise might not have sufficient space to install a dispenser. Fugitive emissions would be greatly reduced so that the likelihood of having a combustible mixture is significantly reduced from that of a traditional dispenser.



Public Input No. 243-NFPA 58-2017 [NewSection after 6.30.5.4]

Both deal with adding filling of cylinders for lowemission transfer.




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Public Input No. 80-NFPA 58-2017 [ New Section after 6.30.4.3(C) ]

6.30.4.3(D) The sign described in 6.30.4.3(C) shall be visible from the point of transfer.


This statement was a second requirement within the previous section. It should be in its own section.







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(C)

Emergency remote shutdown stations shall be identified as such by a sign incorporating thewords “Propane” and “Emergency Shutoff” in block letters not less than 2 in. (51 mm) in heighton a background of contrasting color to the letters. The sign shall be visible from the point oftransfer.


The deleted statement is a second requirement within a single section. It should be in its own section.



Public Input No. 80-NFPA 58-2017 [New Section after 6.30.4.3(C)]




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6.30.5.1

The transfer distance requirements of Table 6.7.2.1 and 6.27.4.3 (1) , parts B, C, D, E, F(2),and J, shall be reduced by one-half where the installation is in accordance with 6.30.5.


There is a contradiction in sections 6.7.3.4 and 6.30.5.1 about which separation distances shall be reduced when the system incorporates the provisions of low emission transfer. The restriction for only certain distances to be reduced in 6.7.3.4 seems intent on limiting the minimum separation to 10 feet. Only section part G of this table and 6.27.4.3(2) allow a distance as low as 5 feet. Several distances could be reduced to less than 10 feet with the language in section 6.30.5.1. Section 6.30.5.1 should be revised so that the requirements are consistent in both sections of the code. Additionally, the reference in section 6.30.5.1 to reducing the minimum separation distance in section 6.27.4.3(1) should be removed, as section 6.27.4.3(2) already allows this minimum separation to be reduced if the provision of low emission transfer are provided. Having this additional statement could lead to confusion where the reduction is already provided.




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6.30.5.5 Transfer into a portable DOT cylinder shall meet the provisions of 6.30.5.5 (A) through6.30.5.5 (F).

(A) Transfer shall be made only through a hose of nominal 1 in. (25 mm) size or smaller.

(B) The delivery valve and nozzle combination shall not contain an interstitial volume greaterthan 0.24 in.3 (4 cm3).

(C) Cylinders shall be filled according to weight on a certified scale.

(D) Fixed maximum liquid level gauges shall not be used in the filling of cylinders.

(E) An overfilling prevention device shall not be used to determine when a cylinder is filled tothe maximum allowable filling limit.

(F) The cylinder shall have a propane capacity of 100 pounds or less.

.


The current requirements for low emission transfer are limited to filling of only ASME containers. There is a desire in the industry to fill cylinders using low emission transfer and to claim the reduced separation distance requirements allowed for filling ASME containers. This would allow installation and use of dispensers on sites that otherwise might not have sufficient space to install a dispenser. Fugitive emissions would be greatly reduced so that the likelihood of having a combustible mixture is significantly reduced from that of a traditional dispenser.







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90 of 272 7/12/17, 11:48 AM


Public Input No. 98-NFPA 58-2017 [ Chapter 7 [Title Only] ]

LP-Gas Liquid Transfer


The current chapter title implies that the chapter only applies to the transfer of liquid LP-Gas. This is not true. Section 7.3 covers venting of LP-Gas to the atmosphere, including the transfer of vapor. The revised chapter title will more accurately reflect the content of the chapter




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Type your content here ...

7.2.2.6 Prior to filling a cylinder, the face seal on CGA 791 and 793 connections shall bevisually inspected for defects (e.g. cracking, gouging, tearing, roping, etc.). If a defect exists thevalve shall be removed and replaced.

Renumber the paragraphs following this new paragraph through 7.2.2.17.


The CGA 791 and 793 connections are primarily used for consumer LP-Gasapplications. There has been an increasing number of reported (primarily in theCGA 791 connection) leaks in the connection due to deterioration of theeffectiveness of the face seal in the connection. The reports indicate that propertydamage and or personal injury may occur if a leak is present. Although full rootcause analysis has not been completed, it is known that environmentalconditions, filling equipment and end user abuse may contribute to theeffectiveness of the seal. Visual inspection of the face seal before filling thecylinder will identify potential defects before the cylinder is filled. The face seal inthe CGA 791 and 793 is not replaceable and therefore if a defect is noted thecylinder valve must be replaced.





Submitter Full Name: Thomas Deary

Organization: Compressed Gas Association

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92 of 272 7/12/17, 11:48 AM



TITLE OF NEW

7.2.2.10 Cylinders required to have an overfilling prevention device (OPD) shall not be filledunless they are equipped with this device and a fixed maximum liquid level gauge.


The first sentence of 5.9.3.3 is relocated here, as it is a filling requirement, and not an equipment requirement. The second sentence is not relocated as it is an equipment requirement, and it is noted that it is also located in 5.9.3.2



Public Input No. 7-NFPA 58-2017 [Section No. 5.9.3.3] Text relocated




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7.2.3.6

During the From the time railroad tank cars are on sidings delivered to sidings anddisconnected from the motive force for loading or unloading until they are again connected tothe motive force for removal , the following shall apply:

(1) A caution sign, with wording such as “STOP. TANK CAR CONNECTED,” shall be placed atthe active end(s) of the siding while the car is connected for product transfer , as requiredby DOT regulations.

(2) Wheel chocks shall be placed to prevent movement of the car in either direction.

(3) *Access to the track shall be secured to prevent entry by other rail equipment while the caris connected for product transfer.

(4) The requirements of 7.2.3.6(2) shall not apply for movement on the siding to facilitateloading or unloading.


The present language has some ambiguity about when the caution sign and wheel chocks are to be in place. “Connected” can mean coupled to other cars or it can mean hoses are connected for transfer of product. The qualifier in (1) is added to remove the ambiguity. The wheel chocks use is clarified much as it is in 9.4.8, requiring blocking the wheels whenever the vehicle is loading, unloading, or parked. This may be a requirement above that of the DOT, but so is the requirement in 9.4.8 for wheel stops for cargo tank vehicles.

The DOT requirements are shown in 49 CFR 174.67, Tank Car Unloading. There are five requirements in subparagraphs (1) through (5). Items in (1), training, and (5), operating procedures, are covered elsewhere in the LP-Gas Code and need not be repeated here. The caution sign is covered in (4) and the wheel chocks are covered in (2). Item (3) is not repeated in the LP-Gas Code. It should be included here so that a person performing the transfer operation using the LP-Gas Code will be informed of all requirements. Exhibit 7.10 in the LP-Gas Code Handbook includes a derail device in the picture.



Public Input No. 27-NFPA 58-2017 [New Section after A.7.2.3.5(A)]




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94 of 272 7/12/17, 11:48 AM




95 of 272 7/12/17, 11:48 AM



7.2.4.2

The hose assemblies specified in 7.2.4.1 shall hose assemblies shall be inspected at leastannually.


Par. 7.2.4.2 limits the annual hose inspection to hose assemblies specified in 7.2.4.1. As 7.2.4.1 applies to all hose assemblies, there is no reason to reference 7.2.4.1 in 7.2.4.2




Affilliation: None

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Submittal Date: Thu May 04 11:11:32 EDT 2017


96 of 272 7/12/17, 11:48 AM




7.3.2 Compressor liquid traps. Venting of liquid LP-Gas from compressor liquid traps shallbe use written procedures and shall be attended.


A new paragraph is added to provide specific requirements for venting of compressor liquid traps. Compressor liquid traps often must be emptied, and venting the liquid is an acceptable method of doing so. Requiring written procedures and attended operation provided specific safety requirements, but maintains flexibility for operators.




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7.3.1 General.

LP-Gas in either liquid or vapor form shall not be vented to the atmosphere unless it is ventedunder the following conditions:

(1) Venting of LP-Gas shall be permitted where the maximum flow from fixed liquid level,rotary, or slip tube gauges does not exceed that does not exceed that from a No. 54 drillorifice.

(2) Venting of LP-Gas From between shutoff valves before disconnecting the liquid transferline from the container shall be permitted.

(3) Venting of LP-Gas, where necessary, shall be permitted to be performed by the use ofbleeder valves.

Venting of LP-Gas shall be permitted

(4) Outdoors via a quick closing valve under conditions that result in rapid dispersion of the

procudct being released .

(5) for the purposes described in 7.3.1 (1) and (2) within structures designed for containerfilling in accordance with Chapter 10.

(6) Venting of LP-Gas vapor from listed liquid transfer pumps using such vapor as a sourceof energy shall be permitted where the rate of discharge does not exceed the dischargefrom a No. 31 drill size orifice.

(7)

(8) Venting of LP-Gas for purging in accordance with 7.3.2 shall be permitted .

(9) Venting of LP-Gas shall be permitted for In emergencies.

(10) Venting of LP-Gas vapor utilized as the pressure source in remote shutdown systems forinternal valves and emergency shutoff valves shall be permitted .


Paragraph 7.3.1 is revised to a more positive format, allowing venting only for the situations listed, rather than having a prohibition with exceptions. Item 3, venting by using bleeder valves is revise by substituting quarter turn valve for bleeder valve as the term is more specific and reflects currently accepted practice, and a requirement for rapid dispersion is added that is identical to paragraph 7.3.2.3 which covers purging of cylinders. Item 5, discharge from a No. 31 drill size orifice is deleted as is specific to a type of piston pump that has not been manufactured for approximately 50 years, has no spare parts availability from the manufacturer, and is not believed to be currently in use.




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7.3.4 Purging of Piping.

7.3.4.1 Purging of piping with a design pressure up to 125 psig shall be in accordance withNFPA 54.

7.3.4.2 . Purging of piping with a design pressure greater than 125 psig shall be in accordancewith NFPA 56, Standard for Fire and Explosion Prevention During Cleaning and Purging ofFlammable Gas Piping Systems


A new 7.3.4 is added to cover purging of piping. Purging fuel gas piping systems up to 125 psig has been addressed in NFPA 54 following an incident in Connecticut in 2010. Purging of fuel gas piping systems operating above 125 psig, and other flammable gas piping systems is covered in NFPA 56 which was first issued in 2014.




Public Input No. 14-NFPA 58-2017 [New Section after A.7.2.3.5(A)]




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7.3.2 Purging of Containers .

7.3.2.1

Venting of gas from containers for purging or for other purposes shall be accomplished inaccordance with 7.3.2.2 through 7.3.2.4.

7.3.2.2

Venting of cylinders indoors shall only occur in structures designed and constructed for cylinderfilling in accordance with 6.7.1.1 and Chapter 10 and with 7.3.2.2(A) through 7.3.2.2(C).

(A)

Piping shall be installed to convey the vented product outdoors at least 3 ft (1 m) above thehighest point of any building within 25 ft (7.6 m).

(B)

Only vapors shall be exhausted to the atmosphere.

(C)

If a vent manifold is used to allow for the venting of more than one cylinder at a time, eachconnection to the vent manifold shall be equipped with a backflow check valve.

7.3.2.3

Venting of containers outdoors shall be performed under conditions that result in rapiddispersion of the product being released.

7.3.2.4

If conditions are such that venting into the atmosphere cannot be accomplished safely, LP-Gasshall be burned at a distance of at least 25 ft (7.6 m) from combustibles.

7.3.2.5

Venting of containers and burning of LP-Gas from containers shall be attended.


The title of paragraph 7.3.2 is revised to identify that the requirements are for purging containers and not for purging piping systems. 7.3.2.1 is revised to clarify that the requirements of the section applies to all transfer. As currently written, it can be interpreted 7.3.1 and 7.3.2 are not both applicable to venting.



Public Input No. 13-NFPA 58-2017 [New Section after 7.3.2]




101 of 272 7/12/17, 11:48 AM



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8.4.2 Protection of Cylinders.

8.4.2.1*

Cylinders at a location open to the public shall be placed on shelves constructed of materialswith a flame spread index, in accordance with ASTM E84, Standard Test Method for SurfaceBurning Characteristics of Building Materials, or ANSI/UL 723, Standard for Test for SurfaceBurning Characteristics of Building Materials, of less than 25 and shall be of sufficient

strength to support the cylinders.

8.4.2.2 The shelves shall be protected by either of the following:

(1) An enclosure in accordance with 6.21.4.2

(2) A lockable ventilated enclosure of metal exterior construction

8.4.2.2 3 *

Vehicular barrier protection (VBP) shall be provided where vehicle traffic is expected at thelocation, except where cylinders are protected in accordance with 8.4.2.1(2).


The information from the annex regarding the fire safety of the shelves is better placed in the body of the standard rather than in the annex, which is not mandatory.



Public Input No. 165-NFPA 58-2017 [Section No. A.8.4.2.1]






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Type your content here ...

8.5.X Retail cylinder filling locations shall be provided with at least one listed portable fireextinguisher in accordance with Section 4.7 with a rating of 4-A:80-B:C.


Retail cylinder filling locations should have the same extinguisher requirements as a retail cylinder exchange location. Extinguishers should be provided for incipient fires wherever propane is stored. NFPA 10, Table 6.2.1.1 requires a 4-A rating for Extra Hazard locations for Class A Hazards. NFPA 10, Table 6.3.1.1 requires an 80-B rating for Extra Hazard locations for Class B Hazards with a travel distance of 50 ft (15 m). This travel distance is stipulated in NFPA 58, paragraph 8.5.3. A single extinguisher with a rating of 4-A:80-B:C would satisfy the NFPA 10 hazard requirements for both Class A and Class B Hazards.


Submitter Full Name: Jennifer Boyle

Organization: FEMA

Affilliation: FEMA

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104 of 272 7/12/17, 11:48 AM



8.5.1

Retail cylinder exchange locations shall be provided with at least one portable fire extinguisherin accordance with Section 4.7 having with a minimum capacity rating of 10 lb (4.5 kg) drychemical on the premises where retail cylinder exchange cabinets are storing more than 720 lb(327 kg) of propane. 4-A:80-B:C.


Rather than requiring extinguishers only where there is a large quantity of propane (720 lb (327 kg) of propane), at least one extinguisher should be provided for incipient fires wherever propane is stored. NFPA 10, Table 6.2.1.1 requires a 4-A rating for Extra Hazard locations for Class A Hazards. NFPA 10, Table 6.3.1.1 requires an 80-B rating for Extra Hazard locations for Class B Hazards with a travel distance of 50 ft (15 m). This travel distance is stipulated in NFPA 58, paragraph 8.5.3. A single extinguisher with a rating of 4-A:80-B:C would satisfy the NFPA 10 hazard requirements for both Class A and Class B Hazards.



Organization: FEMA

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8.5.2

Storage locations, other than those complying with 8.5.1 , where the aggregate quantity ofpropane stored is in excess of 720 lb (327 kg) shall retail cylinder exchange and fillinglocations shall be provided with at least one approved listed portable fire extinguisher inaccordance with Section 4.7 having minimum capacity of 18 lb (8.2 kg) dry chemical. with arating of 4-A:80-B:C.


Rather than requiring extinguishers only where there is a large quantity of propane (720 lb (327 kg) of propane), at least one extinguisher should be provided for incipient fires wherever propane is stored. NFPA 10, Table 6.2.1.1 requires a 4-A rating for Extra Hazard locations for Class A Hazards. NFPA 10, Table 6.3.1.1 requires an 80-B rating for Extra Hazard locations for Class B Hazards with a travel distance of 50 ft (15 m). This travel distance is stipulated in NFPA 58, paragraph 8.5.3. A single extinguisher with a rating of 4-A:80-B:C would satisfy the NFPA 10 hazard requirements for both Class A and Class B Hazards.



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9.4.3.2

The following shall also apply to pipe, tubing, pipe and tubing fittings, valves, hose, and flexibleconnectors:

(1) Pipe shall be wrought iron, steel, brass, copper or copper austenitic stainless steel inaccordance with 5.11.3.1.

(2) Tubing shall be steel, brass, or copper in accordance with 5.11.3.2.

(3) Pipe and tubing fittings shall be steel, brass, copper, malleable iron, or ductile (nodular) ironsuitable for use with the pipe or tubing used as specified in 9.4.3.2(1) or (2).

(4) Pipe joints shall be threaded, flanged, welded, or brazed, and fittings, where used, shallcomply with 9.4.3.2(3).

(5) Where joints are threaded, or threaded and back welded, pipe and nipples shall beSchedule 80 or heavier.

(6) Copper or brass pipe and nipples shall be of equivalent strength as Schedule 80 steel pipeor heavier.

(7) Where joints are welded or brazed, the pipe and nipples shall be Schedule 40 or heavier.

(8) The pressure ratings of fittings or flanges shall comply with Table 5.20.1.2.

(9) Brazed joints shall be made with a brazing material having a melting point exceeding1000°F (538°C).

(10) Tubing joints shall be brazed using a brazing material having a melting point of at least1000°F (538°C).


Marketers & owners of MC331 cargo tank motor vehicles are requesting the use of stainless steel piping, which provides enhanced corrosion resistance. Currently 9.4.3.2 refers you to 5.11.3.1, which has no standard for stainless steel piping. The proposed standard will fill this need.







Affilliation: National Propane Gas Association TS&S Committee

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9.4.8* Wheel Stops Chocks for Cargo Tank Vehicles.

Each cargo tank vehicle or trailer shall utilize a wheel stop chock , in addition to the parking orhand brake, whenever the cargo tank vehicle is loading, unloading, or parked.


Paragraph 7.2.3.6 (2) states:

Wheel chocks shall be placed to prevent movement of the car in either direction.

As wheel chocks and wheel stops have the same function, the same term should be used in each location. Alternately, the term wheel chocks could be used in both locations.




Affilliation: None

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109 of 272 7/12/17, 11:48 AM



9.4.8* Wheel Stops for Cargo Tank Vehicles.

Each cargo tank vehicle or trailer shall utilize a wheel stop stops , in addition to the parking orhand brake, whenever the cargo tank vehicle is loading, unloading, or parked to preventmovement in either direction .


The current text to “utilize a wheel stop … [when] … loading, unloading, or parked” places an unfair requirement on an inspector to explain the need or determine the proper deployment of the wheel stop. (The Annex and handbook text may be useful, but is not enforceable.) For instance, where is the stop placed when the vehicle is on level ground? Must the driver (and inspector) then consider the prevailing wind direction or other factor that could contribute to movement? The performance requirement “to prevent movement in either direction” helps both the driver and inspector to evaluate the placement.How close to the tire shall it be placed? For that matter, how does one decide if the device qualifies as a proper wheel stop for that size tire? Some vendor documents state that a second stop should be used on the downhill side of the tire if the slope exceeds a certain percentage grade. SAE J348, Surface Vehicle Standard, Wheel Chocks, describes that chocks are to be generally about 1/4 the height of the tire diameter and specifies the force they must withstand.We continued to enforce the use of two wheel stops when the change was made in the 2011 edition, acting in the spirit of the former requirement. Also, there was no announced intent to reduce the number of wheel stops in use and no justification for reducing the requirement was presented. The substantiation included a direct correlation, “wheel stop (formerly chock blocks),” from the plural to the singular without any statement about the suitability of using only one device.There have been questions asked of us and at least one appeal of a penalty for not using two wheel stops because of the current wording. The inconsistency between the plural form in the title and the singular form in the body of the text raises questions about the intent of the requirement. As part of our director’s decision process for resolving an appeal, he queried other AHJs. The result was that we learned that some states require only one device and other states require two, thus showing the inconsistency of interpretation resulting from the wording.The addition of the requirement to prevent movement in either direction is not setting a precedent. It is already in the code in section 7.2.3.6(2) for railcar wheel chocks.Our inspection experience indicates that the requirement is regularly, if infrequently, ignored or forgotten (19 times in a recent one-year period), that stops are placed in ineffective positions relative to the tire, and that stops are used upside down from how catalogs show their use.



Public Input No. 97-NFPA 58-2017 [Section No. A.9.4.8]




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11.2 Training.

Each person engaged in installing, repairing, filling, or otherwise servicing an LP-Gas enginefuel system shall be trained in accordance with 4 .4.1.


This will ensure that all the necessary information about propane and emergency reactions during a release are addressed for anyone working on a propane system.





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11.3.1.4

Containers that have been involved in a fire and show no distortion shall comply with thefollowing:

(A) Cylinders shall be requalified in accordance with CGA C-6, Standard for the VisualInspection of Steel Compressed Gas Cylinders, or CGA C-6.3, Guidelines for VisualInspection and Requalification of Low Pressure Aluminum Compressed Gas Cylinders , for forcontinued service before being used or reinstalled.

(A B )

Cylinders shall be requalified by a manufacturer of the type of cylinder or by a repair facilityapproved by DOT.

(B C )

ASME or API-ASME containers shall be retested using the hydrostatic test procedureapplicable at the time of the original fabrication inspected and qualified in compliance with therequirements of the NBIC .

(C D )

All container appurtenances shall be replaced.

(D E )

DOT 4E specification (aluminum) cylinders or composite cylinders involved in a fire shall bepermanently removed from service.


This change clarifies that CGA Standard C-6 applies only to cylinders. Also, aluminum cylinders that have been involved in a fire should not be put back into service due to the relatively low melting temperature of aluminum. Exposure to fire may have altered the structural integrity of the aluminum material.

The NBIC is considered to be the appropriate standard for this inspection and qualification for ASME containers.





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11.3.1.8

Engine fuel containers shall be of either the permanently installed or exchangeable type.


Permanently installed and exchanged containers are the only two types of installations possible so there is no reason to state that.





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11.3.2 Container Maximum Allowable Working Pressure (MAWP).

11.3.2.1

Except for containers complying with 11.3.2.2, ASME engine fuel containers shall have anMAWP of not less than 312 psig (2.2 MPag).

11.3.2.2 ASME

mobile containers shall meet the following conditions:

An MAWP of 312 psig (2.2 MPag) or higher where installed in enclosed spaces of vehicles

An MAWP of 312 psig (2.2 MPag) where installed outside of passenger vehicles

An MAWP of 250 psig

engine fuel containers installed outside of enclosed spaces of non-passenger vehicles shallhave a minimum MAWP of 250 psig (1.7 MPag)

where installed outside of nonpassenger vehicles

.


In 11.3.2.1, the requirement is written so that the MAWP of the container can exceed 312 psig instead of being exactly 312 psig. Striking current 11.3.2.2 (1) and (2) is necessary because mobile containers (see 3.3.48) are outside the scope of Chapter 11 and are addressed in 5.2.4.5. New 11.3.2.2 recognizes that there are existing 250 psig containers that can be installed on off-road vehicles but only under the conditions stated.





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11.3.3.1 *

Containers that show excessive denting, bulging, gouging, or corrosion shall be removed fromservice.


See companion change with information in Annex A.



Public Input No. 201-NFPA 58-2017 [New Section after A.11.3.1]




Affilliation: NPGA Technology, Strandards and Safety Committee

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116 of 272 7/12/17, 11:48 AM



11.3.3.2

Repairs or alteration of a container shall comply with either the regulations, rules, or codeunder which the container was fabricated or 11 .3.3.3.


This proposal provides acknowledgement that the NBIC can be used for ASME containers.





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11.3.5 Container Capacity. Filling

11.3.5.1

The maximum capacity of individual LP-Gas containers installed on highway vehicles shall bein accordance with Table 6.24.3.1(C).

11.3.5.2

Containers larger than 30 gal (0.1 m3) water capacity shall be equipped for filling into the vaporspace.


The title of the section is changed to address the true intent of the section, after the removal of 11.3.5.1, which is done because highway vehicles are outside the scope of Chapter 11.





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Public Input No. 204-NFPA 58-2017 [ Section No. 11.3.7(B) ]

(B)

Stainless steel cylinders , composite or aluminum containers shall not be required to bepainted or powder coated.


Containers made from stainless steel, composite and aluminum should not be required to be coated or painted because of the inherent corrosion resistance provided by these materials.





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11.4.1.2

Container appurtenances subject to pressures in excess of 125 psig (0.9 MPag) shall be ratedfor a pressure of at least 250 psig (1.7 MPag). shall have a pressure rating equal to or greaterthan the design pressure of the container.


The use of containers with greater design pressures than 250 psig is common, so it is necessary to require a matching pressure rating for appurtenances installed in the container.





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Sections] ]

A filler valve shall comply with 5.9.4.1(B C )(7) and shall be installed in the fill opening of thecontainer.


Editorial Correction.





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11.4.1.6

Systems complying with the provisions of 6.30.5 shall have a water-resistant and weather-resistant label placed near the bleeder valve with the following text: “Do not use fixed maximumliquid level gauge at low emission transfer stations.”


This provision is intended for vehicles within the scope of Chapter 12.





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11.4.1.17*

Where an overfilling prevention device is installed on an ASME engine fuel container, venting ofgas through the fixed maximum liquid level gauge during filling shall not be required.

(A) Where the fixed maximum liquid level gauge is not used during filling in accordance with11.4.1.17, the fixed maximum liquid level gauge or other approved means shall be usedannually to verify the operation of the overfilling prevention device.

( B ) If the container is found to be overfilled during the test, corrective action shall be taken.

( C ) The result shall be documented.

( D ) A label shall be affixed to the container near the fill point indicating the expiration date ofthe successful test.


This is an editorial realignment with 11.4.1.18.








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11.4.1.18

Where the fixed maximum liquid level gauge is not used during filling in accordance with11.4.1.17 , the fixed maximum liquid level gauge or other approved means shall be usedannually to verify the operation of the overfilling prevention device.

(A)

If the container is found to be overfilled during the test, corrective action shall be taken.

(B)

The result shall be documented.

(C)

A label shall be affixed to the container near the fill point indicating the expiration date of thesuccessful test.


This is a companion change to the proposal to 11.4.1.17. This text is moved into that section.



Public Input No. 208-NFPA 58-2017 [Section No. 11.4.1.17] Companion Proposal.




Affilliation: NPGA Technology and Standards Committee

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124 of 272 7/12/17, 11:48 AM



11.6.2.9 For fuel injection systems, the applicable requirements of Chapter 12 shallapply.


Fuel injection systems can very well be found on vehicles addressed in Chapter 11. However, no requirements currently exist for them in this chapter. But rather than duplicate requirements here, refer to the detailed requirements in the appropriate sections of Chapter 12.





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11.8.3.3

Containers shall be installed with as much road ground clearance as practical.


The term “ground clearance” is more appropriate for vehicles addressed in Chapter 11, not off-road vehicles that are addressed by this chapter.





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11.8.4.1

Fuel containers shall be installed to prevent their jarring loose and slipping or rotating, and thefastenings shall be designed and constructed to withstand without permanent deformationstatic loading in any direction equal to four times the weight of the container filled with fuel.


As permitted in 12.5.4 for over-the-road vehicles, this revision will allow the energy absorbing structural component to deform. The important performance requirement is to not allow the container to dislodge from its moorings.



Public Input No. 229-NFPA 58-2017 [Section No. A.12.5.4(1)]





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(C)

The pipeaway system shall be permitted to have a length of nonmetallic hose.


This provision should be a design option, recognizing that it may have originally been inserted in order to provide a means to absorb shock and vibration.





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128 of 272 7/12/17, 11:48 AM


Public Input No. 156-NFPA 58-2017 [ Sections 11.9.1.3(A), 11.9.1.3(B) ]

Sections 11.9.1.3(A), 11.9.1.3(B)

(A)

The appurtenances and their connections shall be installed in an enclosure that is gastight withrespect to the driver or passenger compartments or with any space carrying radio transmittersor other spark-producing equipment other sources of ignition .

(B)

The enclosure shall be vented to the outside of the vehicle.


Editorial revision. The term "source of ignition" is used throughout the code, and is the preferred term.




Affilliation: None

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11.9.1.4

Fuel containers shall be installed and fitted so that no gas from fueling and gauging operationscan be released inside of the passenger or luggage compartments by permanently installing aremote filling device (single or double backflow check filler valve) and a fixed maximum liquidlevel gauging device where required to the outside of the vehicle.


Some vehicles may not require the fixed maximum liquid level gauge to be piped away due to the design or use of the vehicle, or because of the use of an overfilling prevention device.





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11.10.1.2*

Piping (including hose) shall be installed in a protected location manner that protects it fromdamage due to accidental contact with stationary objects, or from stones, mud or ice, and fromdamage due to an overturn or similar vehicular accident .


This requirement is reworded to provide more specificity as to which hazards the piping is being protected from. The proposed text in Annex A will emphasize that using the vehicle frame to protect piping is an acceptable method of compliance.








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11.10.1.3

If piping is installed outside the vehicle, it shall be under the vehicle and below any insulation orfalse bottom Piping and hose shall be installed in a manner that permits visual inspection .


This paragraph is reworded to more clearly express its intent.





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11.10.1.7

If a branch fuel line is required, the tee connection shall be in the main fuel line under the floorand outside the passenger compartment of the vehicle.


This proposal intends to acknowledge that not all vehicles will have a “floor.”





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11.11

Pressure Regulating Equipment Installation.

11.11.1 Protection Against Damage.

11.11.1.1

Equipment installed on vehicles shall be protected against vehicular damage in accordancewith 11.8.1 .

11.11.1.2

The gas regulator and the automatic shutoff valve shall be installed as follows:

An approved automatic shutoff valve in compliance with 11.6.3 shall be installed in the fuelsystem.

Approved automatic pressure-

reducingcontrolling equipment shall be installed between the fuel supply container and the carburetor orfinal fuel delivery system.


The current requirements in 11.11.1.1 are redundant and the requirement for the automatic shutoff valve is addressed in 11.6.3. The requirements in 11.11.1 and 11.11.1.2 (1) are only pointers and are not necessary. The new title for 11.11 is more appropriate based on the subject of the paragraph. In addition, the term “pressure-controlling” is substituted for the current “pressure-reducing” to recognize that some fuel systems may actually increase the line pressure over the container pressure in order for the system to function properly.





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11.12 Marking.

11.12.1 Label Requirements.


Section 11.12 consists of a title and a heading, with no requirements. It is not needed.




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11.12 Marking.

11.12.1 Label Requirements.


These section and paragraph headings are not needed since no requirements are contained within them.





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11.13.2.2

Universal cylinders intended for use in the horizontal position shall be installed with thepositioning slot correctly positioned prior to use or filling and shall be permitted to be filled in thevertical position or in the horizontal position when the positioning slot is in the properorientation .


This change clarifies that the cylinder can be filled in either the horizontal or the vertical position.





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11.13.3 Hose.

Hose 60 in. (1.5 m) in length or less shall not be required to be of stainless steel wire braidconstruction where used in vapor service .


Hose in liquid service in engine fuel systems can be subject to more extreme conditions than other applications and because the hose carries liquid, it should be reinforced with stainless steel wire braid.





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11.15.1.2

Air Portable engines shall be used only where sufficient air for combustion and cooling shallbe supplied is available .


Regardless of whether air is supplied mechanically or not, there must be sufficient quantities of air available for combustion and cooling the engine.





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12.1.4

Where the term LP-Gas is used, the requirements of this chapter include and apply equally toany material that is composed predominantly of any of the following hydrocarbons or a mixtureof them: LP-Gas Propoane , propylene, butane (normal butane or isobutane), and butylenes.


This is considered to be editorial but is necessary in order for the text to be understandable.





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12.2 Definitions.

12.2.1 Distribution Block.

The connection point between the fuel line and fuel rail that can also include connection forother devices such as, but not limited to, pressure or temperature sensing.

12.2.2 Direct Injection.

A fuel injection system that delivers LP-Gas fuel through a fuel injector, directly into thecombustion chamber at high pressures, as opposed the injection of fuel into the intake manifoldair flow stream, upstream of and prior to the intake valve opening.

12.2.3 Fuel Switching Device.

A component used in some direct injections systems, which is used to switch between fuels ofa bifuel powered vehicle.

12.2.4 Fuel Rail.

A manifold, pipe, or duct that connects or retains the fuel injection devices for the purpose ofproviding fuel supply to each injector.



12.2.6 Power Supply Bushing.

A sealed fitting that is installed in a container opening or multifunction valve body that sealsconductors passing from the inside to the outside of the pressure vessel for the purposes ofsupplying electrical signals or operating voltage to electrical/electronic components locatedinside the pressure containment area of an ASME container.



12.2.8 Purge Valve.


12.2.9 Unibody.



The definitions in this section are copies of identical definitions in Chapter 3. The code has no other definitions that are duplicated in individual chapters, and there is no reason to do so. Code users


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know that definitions are in Chapter 3 and there is benefit to having them look in two places.




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12.2 Definitions.

12.2.1 Distribution Block.

The connection point between the fuel line and fuel rail that can also include connection forother devices such as, but not limited to, pressure or temperature sensing.

12.2.2 Direct Injection.

A fuel injection system that delivers LP-Gas fuel through a fuel injector, directly into thecombustion chamber at high pressures, as opposed the injection of fuel into the intake manifoldair flow stream, upstream of and prior to the intake valve opening.

12.2.3 Fuel Switching Device.

A component used in some direct injections systems, which is used to switch between fuels ofa bifuel powered vehicle.

12.2.4 Fuel Rail.

A manifold, pipe, or duct that connects or retains the fuel injection devices for the purpose ofproviding fuel supply to each injector.



12.2.6 Power Supply Bushing.

A sealed fitting that is installed in a container opening or multifunction valve body that sealsconductors passing from the inside to the outside of the pressure vessel for the purposes ofsupplying electrical signals or operating voltage to electrical/electronic components locatedinside the pressure containment area of an ASME container.



12.2.8 Purge Valve.


12.2.9 Unibody.



The definitions in chapter 12 are duplicated from chapter 3. They are largely common-sense terms that need no definition. If the reader needs the definition, then they can find it in chapter 3.


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The defined term is not used in the code so must be deleted.








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The defined term is not used in the code so must be deleted.








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12.2.9 Unibody.



As "unibody" is used only in 12.5.8 (7) and a separate proposal has been submitted to revise 12.5.8 (7) to incorporate the definition, this definition is no longer needed. It is also noted that "unibody" is defined in 3.33.84 and that a separate proposal has been submitted to delete that definition.









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12.4.1.2

Valves, accessories, components, equipment, or materials used in any installation shall be of atype and rating recommended by the manufacturer for their intended purpose.


This paragraph is not needed as it is unnecessarily restrictive. It is very broad and allows only components that are specifically recommended for vehicle service to be used. This prevents the use of other materials that are not specifically recommended for vehicle use, which may be equivalent or superior. This type of restriction is not used elsewhere in the Code and is not needed here.




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12.4.1.3

Alternative methods and materials are permitted where approved in accordance withSection 1.5 .


Section 1.5 is applicable whether cited in this chapter or not. This paragraph is redundant and is not needed.




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(A)

Evaluations and testing shall be performed by an approved a nationally recognized testinglaboratory.


"approved" is defined as acceptable to the AHJ. It is unreasonable to require the AHJ to select acceptable testing laboratories. No criteria is provided for the AHJ to use in approving a testing lab. OSHA publishes a list of Nationally Recognized Testing Laboratories, and this list is widely used.




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12.4.2.4

The number maximum aggregate capacity of ASME containers mounted on an containerssupplying fuel to a LP-Gas powered vehicle shall be limited to three separate ASME

containers with a maximum aggregate capacity of 300 gal (1.1 m3) water capacity.


There is no technical or safety reason to limit the number of containers on a vehicle.





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12.4.3.2

ASME container appurtenances shall be rated for the design pressure of the ASME container,as indicated on the ASME data plate.


It is not necessary to refer to the nameplate. The design pressure of an ASME container is known to fuel system designers who specify the ASME container.




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Public Input No. 149-NFPA 58-2017 [ Sections 12.4.3.3, 12.4.3.4 ]

Sections 12.4.3.3, 12.4.3.4

12.4.3.3

An ASME container shall be provided with one or more pressure relief valves of the spring-loaded internal type with a start-to-discharge pressure setting of not less than the MAWP of theASME container.

12.4.3.4

Each ASME container shall be provided with a pressure relief valve complying with inaccordance with 5.9.2 .


This revision combines 2 paragraphs on the same subject, and deletes text that repeats the requirements of 5.9.2.




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12.4.3.5

Manifolded ASME containers shall only with interconnecting piping providing adequate reliefcapaclty and one or more pressure relief valves shall not require a single pressure relief valve,communicating with the vapor space of the valve on each container.


As written the requirement rewrites the ASME Boiler and Pressure Vessel Code. The ASME code requires each pressure vessel to have adequate relief capacity, which can be accomplished by properly sized interconnecting piping to an ASME container with one or more pressure relief valves providing capacity for all interconected containers. The revised text attempts to be full consistent with the ASME Code.




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12.4.3.5

Manifolded A manifold ASME containers container shall only require a single pressure reliefvalve, communicating with the vapor space of the container.


This is an editorial change based on the definition in 3.3.46.





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12.4.5.4

For ASME containers installed manufactured after January 1, 2020, the filler valve fillconnection shall be of the quick-connect/release Type K15 in accordance with ISO/NP 19825,Road Vehicles — Liquefied Petroleum Gas (LPG) Refuelling Connector.


This proposal would permit existing containers to be utilized in new installations without having to retrofit a different style fill connection onto the container.





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12.4.5.4

For Filler valves on ASME containers installed after January 1, 2020 , the filler valve shall beof the quick-connect/release Type K15 in accordance with ISO/NP 19825, Road Vehicles —Liquefied Petroleum Gas (LPG) Refuelling Connector.


Editorial. It is not good practice to start a sentence with "for". The revision is better English.




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12.4.7.1

All ASME LP-Gas ASME containers manufactured after January 1, 1984 shall be equipped witha listed overfilling prevention device (OPD).


Showing ASME twice is redundant.




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Sections] ]

Where the overfilling prevention device is used as the primary means to fill the ASME container,the fixed maximum liquid level gauge or other approved means gauge shall be used at leastonce annually to verify the operation of the overfilling prevention device.


AHJ is defined as the Authority Having Jurisdiction, and this term is well understood as it applies to stationary propane installations. Vehicle installations could be subject to multiple AHJs as the vehicle travels across states, cities, and counties. Some states have one authority for propane vehicles, while others have the authority at the city or county level, or the AHJ could be the local fire department. Also, it is not clear that many AHJ have the expertise to approve propane systems and components. Because of this there is no unique AHJ to approve the system or component.

Therefore it is not appropriate to require approval of an alternate device to the OPD because the AHJ in different jurisdictions have greatly varying knowledge of how to approve such alternate. Further, no guidance is provided to the AHJ in the code or annex on a basis of approval.




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12.4.9 Fuel Injectors, Fuel Rails, and Distribution Blocks.

12.4.9.1

Fuel injectors, injector rails, and distribution blocks and fuel-switching devices shall comply withthe requirements of ECE R67.01, Annex 11.

12.4.9.2 *

Electrical connections for injectors shall be automotive grade and shall plug into the harnesswith either a direct connection using the same connector or an adapter.

12.4.9.3 *

Fuel rails and distribution blocks shall be fabricated from corrosion-resistant materialscompatible with LP-Gas and other fluids in the engine compartment and shall be rated for themaximum design pressure within the system.

12.4.9.4

Fuel rails and distribution blocks shall be marked with the model number, MAWP, andmanufacturer’s name.

12.4.9.5

Distribution blocks and other components on systems operating at pressures greater than350 psig (2.4 MPag) shall be designed and rated for their intended pressures and shallincorporate into their design a means for protecting downstream fuel lines and components thatare designed for a lower operating pressure, from exposure to pressures in excess of theirratings.

12.4.9.6 *

Distribution blocks and other components that are capable of retaining liquid between twopositive shutoff valves shall have a means to protect the system from pressures exceeding itsrated maximum operating pressure.

12.4.9.7

Fuel-switching devices used on bifuel vehicles shall be designed to prevent the unintendedmigration of either fuel into the container or piping system of the other fuel.

12.4.9.8

Fuel-switching devices shall be marked with a MAWP that is equal to or greater than that of thesystems they are installed in.


Fuel injectors, fuel rails, and distribution blocks are engine components and should not be covered in NFPA 58. A proposal has been made to delete Section 12.11, Fuel Rails and Distribution Blocks.





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12.4.10.5

Tubing shall be stainless steel, brass, or copper and shall comply with the following:Stainlesssteel tubing shall comply with 11.7.1.2 .

Brass tubing shall comply with ASTM B135, Standard Specification for Seamless Brass Tube .

Copper tubing shall comply with one of the following :

Type K or L: ASTM B88, Specification for Seamless Copper Water Tube

ASTM B280, Specification for Seamless Copper Tube for Air Conditioning and RefrigerationField Service

ASTM B75, Standard Specification for Seamless Copper Tube

The tubing shall be rated for 5 times the design pressure of that location in the system.


Paragraphs 11.7.1.2 and 12.4.10.5 cover the same subject and should be identical. This revision refers to 11.7.1.2 as the prime source for tubing requirements. If this revision is accepted, reference to ASTM B75 for seamless copper tubing will be deleted. If this spec is needed, it should be added to 11.7.1.2.




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12.4.11.3

Tube fittings operating at a pressure below 125 psig (860 kPa) shall be made of steel, stainlesssteel, brass, or anodized aluminum and rated for with a design pressure of not less than125 psig (860 kPag) for operating pressures of 125 psig (860 kPag) or less .


The paragraph is revised for clarity. This change also make the structure congruent with the following paragraph which is on the same subject.







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12.4.11.4

For higher operating pressures, tubing tubing and fittings operating above 125 psig shall berated for a minimum of 250 psig (1725 kPag) or the design pressure of the system, whichever isgreater, and the tubing and fittings shall be compatible .


The current paragraph applies to "higher operating pressures", but it is not clear what the operating pressure is higher than. It is assumed that the paragraph is related to the previous paragraph, but that is not clear. The revision attempts to make the requirement clearer to all code readers. The last phrase on compabality of tubing and fittings is deleted because it is a separate requirement and is relocated to a new paragraph.







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12.4.11.5

Joints in the tubing shall be made by means of a flare joint, compression fitting, or otherapproved fitting that is compatible with the tubing .


Text is relocated from 12.4.11.1 on the same subject.




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12.4.11.5

Joints in the tubing shall be made by means of a flare joint, or a compression fitting, or otherapproved fitting .


The paragraph is revised to be specific. As written the AHJ can be requested to approve other fittings however no criteria is provided to assist the AHJ in approving alternates. If this flexibility is needed, the text should be more specific, such as by requiring alternate fittins with the same or greater pressure rating and tightness under operating conditions.

It is also noted that AHJ is defined as the Authority Having Jurisdiction, and this term is well understood as it applies to stationary propane installations. Vehicle installations could be subject to multiple AHJs as the vehicle travels across states, cities, and counties. Some states have one authority for propane vehicles, while others have the authority at the city or county level, or the AHJ could be the local fire department. Also, it is not clear that many AHJ have the expertise to approve propane systems and components. Because of this there is no unique AHJ to approve the system or component.




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12.4.11.6

A bulkhead fitting used to secure a LP-Gas fuel line passing through a partition, firewall, frame,or other such vehicle part shall meet the following requirements:

(1) Be made of either steel, brass, or anodized aluminum, and rated for the service pressureof the fuel line

(2) Use a flare, tapered pipe, compression fitting, or other approved fitting to connect the LP-Gas fuel line fitting to the bulkhead fitting


The paragraph deals with bulkhead fittings, and bulkhead fittings are fittings. Requirements for fittings are referenced in 12.4.10.2 to 11.7.2. Given this reference further requirements for fittings are not needed here. If the requirements of 11.7.2 are not sufficient, 11.7.2 should be revised, or 12.4.10.2 should be revised.




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12.4.11.7

The use of quick-connect fittings rated by the manufacturer for the specific application shall bepermitted.


The paragraph does not contain a requirement and is therefore not needed. It does not prohibit the use of quick-connect fittings not rated to be used.




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12.4.12.5

Hose shall be marked with the following information:

The manufacturer’s name

The model number

The minimum pressure rating/burst pressure (at least five times the minimum pressure rating)

LP-Gas

(1) LP-GAS HOSE or LPG HOSE

(2) Maximum working pressure

(3) Manufacturers’ name or coded designation

(4) Month or quarter and year of manufacture

(5) Product identification


The requirement is revised to be identical to 5.11.6.4 (B) (1), on the same subject. There is no reason to have different marking requirements for LP-Gas hose for different applications.




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12.4.14.4

The use of soldered connections that are sealed with automotive shrink insulation shall bepermitted.


The paragraph does not include a requirement and is not needed. It does not prevent the use of soldered connections that ane not sealed in automotive shrink insulation to be installed.




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12.4.15 Evaporative Emissions Control.

12.4.15.1

LP-Gas system evaporative emissions control devices shall be controlled by the LP-Gassystem controller.

12.4.15.2

LP-Gas system evaporative emissions control devices shall be designed so that all capturedvapors are retained and controlled.


The subject of evaporative emissions control should not be covered in NFPA 58. It is an environmental requirement that is regulated by the U. S. Environmental Protection Agency. The code and should not require propane enforcers to verify that captured vapors are retained and controlled.




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12.4.15.2

LP-Gas system evaporative emissions control devices shall be designed so that all capturedvapors are retained and controlled.


The requirement is not needed. Section 7.3 is applicable whether stated her or not.




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12.5.1.3

Before installing any replacement part of an LP-Gas fuel system, the installer shall ensure thatthe replacement part is replacement parts shall be at least the equivalent of the original partwith respect to its performance and safety attributes, and is shall be compatible with andrecommended by the original equipment or system manufacturer.


Edited for simplicity, to state what is required, not to put responsibility on the installer. The requirement that replacement parts be recommended by the OEM is deleted as it could be in restraint of trade. Compatibility with the OEM part is sufficient safety requirement.




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12.5.1.5

Before returning an ASME container purged of LP-Gas back into service, the ASME containerand all connecting components and fuel lines shall be tested by pressurizing the ASMEcontainer and connecting components to 140 psig (965 KPag) the design pressure using LP-Gas, air, or an inert gas, and the system shall not experience a loss of pressure for a minimumtime of 10 minutes. . The test duration shall be a minimum of 10 minutes


The requirement is revised to be consistent with other pressure test requirements in NFPA 58. The test pressure of 140 psig was added in the 2017 edition when chapter 12 was added. No substantiation was provided to support the 140 psig test pressure, and the design pressure is substituted. Paragraph 6.16.3 requires that piping be pressure tested in accordance with NFPA 54. NFPA 54, 8.1.4.1 requires pressure testing of piping at 1.5 times the design pressure. As the test here includes the ASME pressure vessel, it is not practical to test the pressure vessel at 1.5 times design pressure as the pressure relief valve will operate. Therefore a test at the design pressure is proposed, and is believe to be reasonable and safe.

It is noted that there are potential safety issues with testing pressure vessels with a gas, and the committee may opt to require testing of the piping only at the test pressure used in NFPA 54.




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12.5.1.6

Fuel shall not be released from a system in an enclosed area, or within 35 ft (11 m) of anypotential ignition source. system indoors. Venting outdoors shall be in accordance with 7.3.2.


The term "enclosed area" is neither clear or used elsewhere in NFPA 58 in this context. "Outdoors" is substituted as it is a term used in NFPA 58 and is understood. Outdoor venting is referred to Section 7.3.2 which is relevant and appropriate.




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12.5.1.7

Where a vehicle is operated using configured to operate solely on LP-Gas only ,existinggasoline or diesel tanks that are installed shall have their fill connections removed or pluggedafter purging of any residual fuel or vapors.


This change is editorial.





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12.5.1.8

The LP-Gas supply for any LP-Gas fuel system shall be from an ASME container permanentlymounted on the motor vehicle.


It is proposed to delete 12.5.1.8. 1. The paragraph deals with the installation of ASME containers, which is within the scope of 12.4, ASME Containers, Materials, and Equipment, not 12.5, LP-Gas Fuel Systems. 2. The paragraph is not needed. It requires "permanent attachment" of the container, which to some code readers means that it must be welded to the vehicle and that bolting is not permitted. 3. Par 12.4.1.4 does not allow cylinders to be used as a permanent fuel supply, therefore it is not necessary to specify ASME cylinders here.




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12.5.1.14

Every ASME container fitting ASME container fittings shall be leak checked with a liquid leakdetector solution or device approved gas detector after the equipment is connected, activated,and pressurized. If leakage is detected, leaks shall be repaired before the container is put intoservice.


Revised for clarity, and to require an "listed gas detector" rather than a "device". Listed gas detectors are available. If leakage is detected, leaks shall be repaired before the container is put into service. A requirement that leaks be repaired is added. As currently writtien, a leaking ASME container fitting could be placed in service.




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(A)

The enclosure shall be gastight with respect to driver or passenger compartments and to anyspace containing radio transmitters or other spark-producing equipment other sources ofignition .


Editorial revision. The term "source of ignition" is used throughout the code, and is the preferred term.




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Sections] ]

The ASME container appurtenances and their connections shall be installed in an enclosurethat is securely mounted enclosure installed on the ASME container.


Editorial. 1. "securely"l is meaningless as currently used. The AHJ has no criteria to judge what is "secure". 2. "Installed" is substituted for "mounted" to use the appropriate term. Currently both terms are used interchangeably in the Code.




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12.5.5.3

ASME containers and fueling piping shall be installed and fitted installed so that no gas fromfueling and gauging operations can be released inside of the passenger or luggagecompartments by permanently installing a remote filling device ( single or double backflowcheck filler valve ) and a fixed maximum liquid level gauging device when required to theoutside of the vehicle.


Editorial revision. The parenthetical phrase is removed as the content is a requirement and should not be in parenthesis.




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12.5.8 ASME Container Protection.


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ASME containers shall comply with the following:

(1) ASME containers shall be located to minimize the possibility of damage due to externalforces.

(2) If mounted within 10 in. (254 mm) of the engine or the exhaust system, not including thecatalytic converter, ASME containers shall be protected with a radiation heat shield locatednot less than 1 in. (25 mm) from the ASME container.

(a) The radiation heat shield shall not be attached to the exhaust system.

(b) The radiation heat shield is permitted to be a reflective metal or anotherreflective/insulating material approved by the AHJ.

(c) Adhesive heat shielding/radiant barriers that are recommended by the manufacturerfor automotive application shall be permitted to be affixed to the ASME container.

(3) Modifications of spare tire wells to accommodate the installation of ASME containers shallbe permitted provided the space between the opening created in the tire well and thesurface of the ASME container is sealed to prevent the infiltration of water and road debris.

(4) ASME containers shall not be mounted within 8 in. (203 mm) of a catalytic converter unlessthermal protection is provided to maintain the pressure in the container below the MAWP.

(5) ASME containers shall not project beyond the side of the vehicle as shown in “plan view.”

(6) No part of an ASME containers shall be located above the highest point of the vehicle asreceived from the manufacturer or ahead of the front axle of a self-propelled vehicle.

(7) ASME containers located behind the rear axle of a uni-body passenger bus shall complywith all of the following:

(a) The vehicle bumper shall be reinforced by the addition of two 2 in. × 2 in. × 0.25 in.(50 mm × 50 mm × 6.4 mm) hollow square steel members (or equivalent) mounted tothe existing bumper’s mounting points.

(b) An ASME container mounted behind the rear axle and under the vehicle shall belocated as follows:

i. A minimum of 4 in. (100 mm) from the differential housing

ii. Not less than 12 in. (305 mm) from the rearmost point of the bumper to the ASMEcontainer, ASME container valve(s), or any ASME container appurtenance —unless the bumper is reinforced

iii. As high as practical without modifying the vehicle structure (see Figure 12.5.8)and in accordance with 12.5.7

Figure 12.5.8 ASME Container Mounted Behind the Rear Axle.


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OEMs typically attach radiation shields to the exhaust system and they have been shown to function sufficiently.





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(5) ASME containers shall not project beyond the side of the vehicle as shown in “plan view .”


(7) ASME containers located behind the rear axle of a uni-body passenger bus shall complywith all of the following:

(a) The vehicle bumper shall be reinforced by the addition of two 2 in. × 2 in. × 0.25 in.(50 mm × 50 mm × 6.4 mm) hollow square steel members (or equivalent) mounted tothe existing bumper’s mounting points.







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Fuel system up-fitters do not typically provide drawings in plan view. This requirement is more clearly understood with the modifications shown.





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(5) ASME containers shall not project beyond the side of the vehicle as shown in “plan view.”


(7) ASME containers located behind the rear axle of a uni-body passenger bus shall a passenger bus with frame and body that are constructed as a single assembly that doesnot have a separate frame on which the body is installed shall comply with all of thefollowing:

(a) The vehicle bumper shall be reinforced by the addition of two 2 in. × 2 in. × 0.25 in.(50 mm × 50 mm × 6.4 mm) hollow square steel members (or equivalent) mounted tothe existing bumper’s mounting points installed between the bumper and the vehicle .







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Paragraph (2) (b) is deleted because it is not a requirement. It allows certain materials to be approved, but is silent on other materials, therefore other materials can be used without approval. In addition no criteria is provided for the AHJ to approve the materials. If requirements are needed in the code for insulating materials a performance requirement would be much more specific and clearer.

Paragraph (2) (c) allows a manufacturer to approve materials. This is contrary to the definition of approved in 3.2.1 which allows the AHJ to approve materials. IF this requirement is needed, it should be change to allow only materials recommended by the manufacturer.

Revisions to (7) is editorial. The term "unibody" is defined in both 3.3.84 and 12.2.8. It is used only in paragraph 12.5.8 (7). As the term is used in only one location it is proposed to move the definition into the paragraph where it is used. This removed the need to define the term and remove the need for more page turning by code users.

Par. 7 (a) is revised to use "installed" instead of "mounted" and further revised to be clearer. "Installed" and "mounted" are currently used interchangeably throughout the Code, and installed is the preferred term.










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12.5.9 Protection for Appurtenances and Remote Fill Connections and Fittings.

All valves, connections, and gauging devices on an ASME container shall be protected fromexternal damage in accordance with the following:

(1) All openings greater than a No. 54 orifice shall be protected by an excess flow valve or adouble back check valve or shall be protected from shearing forces by recess or guarding.

(2) Parts of the vehicle shall be permitted to provide protection to valves and fittings.

(3) Filling and gauging fittings in a location remote from the ASME container shall be protectedfrom physical damage by one of the following means:

(a) In a metal enclosure, or using another material that provides an equivalent level ofprotection to that provided for the fuel receptacle, which is permanently mounted to thevehicle and does not protrude outside the vehicle’s body

(b) Located in such a way that the rear bumper or another part of the vehicle will provideprotection

(c) By attachment of the protective devices that are designed and installed to fail prior tothe failure of the container

(d) By not mounting remote valves and fittings in or on the bumpers of a vehicle or beyondthe portion of the body from which the bumper protrudes

(4) Valves and appurtenances shall either be of corrosion- resistant material or shall be coatedor protected to minimize exterior corrosion.


This text is moved from 12.5.10 because it is more suitable in this location.








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12.5.10

Valves and appurtenances shall either be of corrosion-resistant material or shall be coated orprotected to minimize exterior corrosion.


This requirement is proposed to be moved to 12.5.9 as a more appropriate location.



Public Input No. 233-NFPA 58-2017 [Section No. 12.5.9] Companion Proposal





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12.5.11 Pressure Relief and Hydrostatic Pressure Control.

Pressure relief valves and hydrostatic relief valves shall be installed in accordance with thefollowing:

(1) Pressure relief valves shall be installed to communicate with the vapor space of the ASMEcontainer.

(2) The system shall be designed to ensure that during normal operation or refueling thepressure relief valve will not open.

(3) Shutoff valves or other equipment shall not be installed between the pressure relief valvesand the opening in the ASME container.

(4) Where liquefied LP-Gas is isolated in piping or between shutoff valves, hydrostaticpressure shall be controlled by one of the following methods:

(a) A back check valve or internal relief valve that is installed in such a manner as torelieve any increase in pressure in the isolated portion of the fuel lines, either into thecontainer or into another portion of the system that is protected by a hydrostatic reliefvalve

(b) A hydrostatic relief valve complying with Section 5.14

(c) Any method recommended by the manufacturer

(d) Any other approved method

(5) The discharge of the hydrostatic relief valve shall be located outside the enginecompartment and in accordance with 12.5.11.

(6) The discharge of an installed hydrostatic pressure relief valve underneath the vehicle shallbe directed downward and away from any potential ignitions source, the catalytic converter,or any portion of the exhaust system.


Technical clarity.




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(6) The discharge of an installed hydrostatic relief valve underneath the vehicle shall bedirected downward and away from any potential ignitions source sources of ignition , thecatalytic converter, or any portion of the exhaust system.


This is an editorial change.





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(e)


(6) The discharge of an installed hydrostatic relief valve underneath the vehicle shall bedirected downward and away from any potential ignitions source, the catalytic converter, orany portion of the exhaust system.


Paragraph 12.5.11 (d) is not needed for two reasons:First, it repeats the equivalency requirement of Section 1.5, which is applicable.Second, it puts the responsibility of approving alternate methods of installing hydrostatic relief valves on the AHJ without providing criteria for approval. It is noted that the requirements for the installation of hydrostatic pressure relief valves in 6.15 could be referenced as an alternate.




Affilliation: None

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12.5.12 Pressure Relief Valve Discharge System.

The pressure relief valve discharge from an ASME container shall be in accordance with thefollowing:

(1) It shall be sized for the required the combined flow rate of all relief valves attached to it.

(2) It shall be directed upward or downward within 45 degrees of vertical.

(3) It shall not directly impinge on the ASME container(s), the exhaust system, or any otherpart of the vehicle.

(4) It shall not be directed into the interior of the vehicle.

(5) Where the pressure relief valve discharge is piped away, the pipe away system shall havea breakaway adapter in accordance with the following:

(a) The breakaway adapter shall have a melting point greater than the melting point of thehose or conduit connected to it for the purpose of redirecting discharged pressure.

(b) The adapter either shall be an integral part of the pressure relief valve or shall be aseparate adapter attached directly to the pressure relief valve.

(c) The pipe-away system shall be permitted to utilize a length of nonmetallic hose orconduit with a melting point less than the pipe-away adaptor connected to the pressurerelief valve. The hose or conduit shall be permitted to have metallic reinforcement.

(d) The nonmetallic hose shall be as short as practical and shall be able to withstand thedownstream pressure from the pressure relief valve in the full open position, and thehose shall be fabricated of materials resistant to the action of LP-Gas.

(e) Where hose is used to pipe away the pressure relief valve discharge on ASMEcontainers installed on the outside of the vehicle, the breakaway adapter and anyattached fitting shall deflect the pressure relief valve discharge upward or downwardwithin 45 degrees of vertical and shall meet the other requirements of 11.8.5.1 withoutthe hose attached, and if an additional fitting is necessary to meet this requirement, itshall have a melting point not less than that of the pipe-away adaptor connected to thepressure relief valve, or the discharge hose/conduit.

(f) The pipe-away system shall have a protective cover to minimize the possibility of theentrance of water or dirt into either the pressure relief valve or its discharge system,and the cover shall not restrict the flow.

(g) No portion of the system shall have an internal diameter less than the minimuminternal diameter of the recommended breakaway adapter.

(h) The breakaway adapter either shall be threaded for direct connection to the pressurerelief valve and shall not interfere with the operation of the pressure relief valve, or itshall be an integral part of the pressure relief valve and shall break away withoutimpairing the function of the pressure relief valve.

(i) The pipe-away system connections shall be mechanically secured and shall notdepend on adhesives or sealing compounds and shall not be routed between abumper system and the vehicle body.

(j) Where a pipe-away system is not required, the pressure relief valve shall have aprotective cap or cover to protect it from water or debris.


Editorial revision. Flow rates are not required. The change is clear and grammatically correct


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12.5.14 Fuel Pumps.

Fuel pumps shall comply with the following:

(1) ASME containers with the fuel pump installed inside shall be identified by the words “FuelPump Inside.”

(2) The electrical power to a fuel pump shall be switched off in the event of a crash thatactuates a crash sensor, if so equipped.

(3) The fuel pump shall be permitted to run for a predetermined amount of time when theignition switch is turned to the “engine on” position before the electric starter motor isengaged, or as required by specific system start protocols that utilize other systems toactivate the fuel pump.

(4)

(5) All safety controls for the fuel pump, including but not limited to crash sensors, inertiaswitches, run dry protection, or other safety functions, shall be retained and fully functionalwhen operating the fuel pump, for either bifuel or monofuel systems.

(6) All fuel pump power circuits shall be fuse protected.

(7) To prevent overpressurization, fuel pump discharge piping shall have a means of relievingpressure inside the ASME container in the event of a restriction or blockage in thedischarge piping.

(8) Internal fuel pump wiring shall have an insulation material , such as THHN or TFFN that iscompatible with LP-Gas.

(9) Internal fuel pump wiring connectors shall be automotive grade.

(10) Internal fuel pump wiring shall be secured in a manner that prevents damage fromvibration, chaffing, or abrasion.


(3) is deleted as it is not a requirement. It allows a fuel pump to run, but does not require it to run. It appears to be guidance to designers. Such material should be located in Annex A, if required.

(7) is revised by deleting "such as THHN or TFFN" as it is not a requirement, rather a list of acceptable materials. If these insulating materials are needed they should be required, not included in a list. These could be relocated to Annex A.




Affilliation: None

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12.6 Electrical Installation.

12.6.1

The electrical components of the LP-Gas fuel system shall be protected against overloads, withat least one separate fuse that is sized for the rated load of the system provided, and itslocation shall be marked in the operator’s manual.

12.6.2

Electrical cables shall be protected from damage due to flexing, abrasion, and other stresses,and they shall be secured to the vehicle chassis or other vehicle structure.

12.6.3

Installed sections of wire(s) shall be enclosed in a protected sheath of materials recommendedby the manufacturer for that application.

12.6.4

The use of electrical tape to insulate bare wire connections shall not be permitted.

12.6.5

Installed sections of wiring shall be protected from abrasion, chaffing, snags, or external forces.

12.6.6

Electrical connections shall be sized for the rated load and shall be made with sealedconnections having positive locking mechanisms.

12.6.7

All wiring connections shall either use connectors recommended by the manufacturer or besoldered and the connection protected by heavy wall shrink insulation or other approvedinsulation.

12.6.8 *

Electrical connections made inside of an ASME container, or in any portion of the system thatcontains fuel, shall be made with connectors of automotive grade using positive lockingmechanisms.

12.6.9

All wiring bundles shall be protected with loom or another automotive grade protective cover.

12.6.10

Where wiring bundles will be exposed to radiant heat from the engine or exhaust components,protection from overheating shall be provided.


This section contains electrical installation requirements that are in excess of electrical requirements in other chapters. The level of detail is not needed in NFPA 58 which should incorporate performance base requirements where possible. It uses vague terms, such as "heavy wall shrink insulation", and "protected sheath of materials", "automotive grade". In addition, it includes requirements that components be protected from "flexing, abrasion, and other stresses" without any guidance to


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enforcers on what is acceptable or not acceptable.




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12.6.1

The electrical components of the LP-Gas fuel system shall be protected against overloads, withat least one separate fuse that is sized for the rated load of the system provided, and itslocation shall be marked in the operator’s manual and accessible without the use of tools .


This modification will help to ensure that any overload protection is installed to be “readily accessible.”





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12.6.7

All wiring connections shall either use connectors recommended by the manufacturer or besoldered and the connection protected by heavy wall shrink insulation or other approvedinsulation.


The requirement is revised to 1. Remove a vague requirement for "heavy duty shrink insulation" which is highly subjective, 2. Remove approval, as no criteria for approval is provided.

The revised requirement is vague and it is recommended that the committee provide specific procedures or specifications for wiring connectors.




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12.7 Installation of Pipe, Tubing, and Hose.

12.7.1

The number of joints shall be kept to a minimum.

12.7.2

Piping and fittings shall be cleaned and free from cutting burrs, threading burrs, scale, anddefects.

12.7.3

The ends of all piping shall be reamed.

12.7. 4*

Where applicable, all threaded connections shall be tightened to the torque specification of thefitting or fuel system manufacturer’s specifications.

12.7.5

LP-Gas piping, tubing, and hose shall be secured to the vehicle at intervals not greater than24 in. (61 cm) by corrosion-resistant hose/tubing mounting fixtures that are constructed of amaterial rated for the application.

12.7.6

Any pipe, tubing, or hose connection not in use shall be capped or plugged.

12.7.

7

Immediately before sheathed copper tubing enters either a sealed compartment or an enginecompartment, a 1 in. (25 mm) piece of sheathing shall be removed to provide ventilationaround the copper tubing.

12.7.

8

All pipe and tubing joints and hose connections shall be accessible for service and inspectionafter installation.

12.7.

9

A connection requiring service, maintenance, or inspection shall be accessible.

12.7.10

Where a thread sealant is used, it shall be certified in accordance with CAN/ULC-S642 ,Standard for Compounds and Tapes for Threaded Pipe Joints , and shall be applied to the malethreads of a metal pipe.


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12.7.

11

All piping and tubing fittings shall be inspected or tested to assure that they are correctlyinstalled.

12.7.

12

Piping and tubing shall not be installed between vehicle members or components that exhibitmotion relative to each other.

12.7.13

Components shall be installed in a manner that prevents damage due to vibration, flex, orcontact with other components of the vehicle.

12.7.14

LP-Gas piping, tubing, or hose shall not traverse separate vehicle units.

12.7.

15

Defects in LP-Gas piping or tubing that can affect its performance shall not be repaired, andthe piping or tubing shall be removed from service.

12.7.16

Tubing or hose shall be cut cleanly and square, using a manufacturer-recommended tool andjoints made using only manufacturer-recommended fittings.


12.7.1 is deleted as it is a design issue which is unenforceable. How is the AHJ to determine the minimum number of fittings? The number of fittings is not as important as having sufficient flow.12.7.2 and 12.7.3 are deleted as they are workmanship issues, which are not covered in other chapters of NFPA 58.12.7.5 is revised to use "recommended for the application" instead of "rated for the application", as it is believed that such ratings do not exist.12.7.7 is deleted as it requires that the sheath on copper tubing enters a sealed compartment be removed to provide ventilation. If this is done, the compartment is no longer sealed.12.7.9 is deleted as it repeats 12.7.812.7.10 is deleted as it specifies a requieement for thread sealant that is not required for threads installed in other chapters of the Code.12.7.12 is deleted as it is design restrictive. It does not allow such installation where the piping is designed to absorb the movement without failure.12.7.13 repeats concers over vibration and flexing, which is also located in other locations in Chapter 12. If such a requirement is needed, it should be located at the beginning of the chapter.12.7.14 is deleted as it appears to be in conflict with 12.5.1.1012.5.16 is deleted as it is a workmanship issue which is not addressed elsewhere in NFPA 58




Affilliation: None


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12.8.2

Piping, tubing, and hose shall be protected as follows:From from vibration andabrasion Against , as well as damage or breakage due

due to strain or wear .


This proposal is editorial.





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12.8.3

Tubing and hose within a luggage compartment or other area contiguous to the passenger areaof the vehicle shall be protected from damage and migrating vapor installed so that in theevent of a leak or permeation from the hose, vapor cannot migrate into the passenger space ofthe vehicle.


This proposal is editorial.





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12.8.4

Hose shall be protected from the engine exhaust system by either of the following requirements:

(1) A clearance of not less than 8 in. (203 mm) shall be maintained between a hose orsheathed copper and an engine exhaust system.

(2) The hose or sheathed copper shall be shielded against heat radiation, with the shieldlocated not less than 1 in. (25 mm) from the hose or sheathed copper and a minimum of 1in (25 mm) from the exhaust system, and shall meet the following requirements:

(a) The heat shield shall be noncombustible material and shall extend for a minimum distanceof

10 in10 in . (

250 mm250 mm ) beyond either edge of the heat

generating area from whichsource that it is

being shieldedshielding .

(b) The heat shield shall not be attached to or in contact with any portion of the exhaustsystem.

(c) As an alternative to 12.8.4(1) , the use of an insulated or radiant barrier sleeve shall bepermitted to be extended to a point no less than 8 in. (203 mm) in each direction from the

exposurearea of the hose/tubing exposed to the heat source .


These changes are editorial in nature and intended to clarify the code requirements.





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12.10.5

The use of injectors not approved

Injectors shall be recommended by the system manufacturer

shall not be permitted

.


The paragraph is revised as a positive requirement, and approval by the manufacturer is changed to recommended by the manufacturer.The manufacturer does not approve anything. Only the AHJ can approve components, systems, or installation methods as stated in the definition of the Authority Having Jurisdiction.




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12.11 Fuel Rails and Distribution Blocks.

12.11.1

Fuel rails and distribution blocks shall be installed so that vibration, rubbing, and abrasion willnot damage or affect their operation.

12.11.2

Fuel rails and distribution blocks shall be installed in accordance with the manufacturer’srecommendations.

12.11.3

The mounting position of fuel rails and distribution blocks shall be accessible to connections forservice and inspection.

12.11.4

Fuel rails shall be mounted so there is no relative movement between the fuel rails and theengine.

12.11.5

The use of tie straps or other nonrigid mounting of fuel rails shall not be permitted.

12.11.6

Fuel rails shall not be mounted to any portion of the exhaust system.

12.11.7

Fuel rails shall be mounted to brackets with fasteners that are stainless steel, plated, orotherwise protect the rail body from corrosion.


Section 12.11 is not needed in NFPA 58. It covers the installation of engine components which are of the engine conversion to propane and not propane safety items. NFPA 58 should deal with the fuel system and not the engine. It is noted that the NFPA 52 which covers CNG and LNG engine fuels does not cover the installation of fuel gas rails and distribution blocks.







Affilliation: None

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12.11.2

Fuel rails and distribution blocks shall be installed in accordance with the fuel systemmanufacturer’s recommendations.


This proposal will clarify which manufacturer’s recommendations must be followed for the installation of fuel rails and distribution blocks.





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12.14.2.1

Vehicles parked indoors for display or nonrunning demonstration shall have the following:

(1) No more than 50 percent of fuel capacity or 10 gal (37.9 dm 3 ), whichever is less

(2)

(3) All manual shutoff valves in the closed position

(4) The battery is disconnected


The limit of 10 gallons of propane fuel in a vehicle for display or nonrunning demonstration was added as part of the new chapter 12 in the current edition with no substantiation. There had not been such a limit in NFPA 58 prior to the current edition. While a limit on the amount of propane in a vehicle at an exhibit or show is reasonable, 10 gallons of propane is a lot in an exhibit hall where the public is in attendance, and if leakage occurs can cause significant fire and damage.

It is understood that many local regulations require that propane fuel systems be empty for display or nonrunning demonstrations (the vehicle is fuel from a cylinder while being driven in and out).




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13.7.1

Spacing of refrigerated LP-Gas containers designed to operate at greater than 15 psi (103 kPa)from occupied from important buildings, storage containers for flammable or combustibleliquids and or flammable gasses , and lines of adjoining property that can be built upon shall bein accordance with Table 13.7.1.

Table 13.7.1 Minimum Distances for LP-Gas Containers That Operate Above 15 psi (103 kPa)

Water Capacity per Container

Aboveground Containers

gal m 3

ft m

≤70,000 ≤265

75 23

70,001–90,000 >265–341

100 30

90,001–120,000 >341–454

125 38

120,001–200,000 >454–757

200 61

200,001–1,000,000 >757–3785

300 91

>1,000,000 >3785

400 122


49 CFR § 173.115(a) has definitions for flammable gasses and § 173.120(a) has definitions for flammable and combustible liquids. They are not the same. With that determination, the LP-Gas Code has nothing concerning separation distance requirements between refrigerated storage containers of LP-Gases and ambient-temperature storage containers of LP-Gases. It would seem that such separation distance requirements would be included in the code. I know of one site, the Dixie


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Pipeline terminal in Apex, NC, where a refrigerated tank and ambient-temperature tanks are both present. I expect there are others, too.Other places in the LP-Gas Code refer to separation from important buildings. The only places that specify “occupied buildings” are 13.7.1 and 13.7.2. These should be changed to “important buildings” for consistency. Additionally, by using “occupied buildings,” it could be argued that the separation requirements would change as the building’s status, occupied or unoccupied, changed during the day.




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13.7.2

Spacing of refrigerated LP-Gas containers that operate below 15 psi (103 kPa) from occupiedfrom important buildings, storage containers for flammable or combustible liquids and forflammable gasses , and lines of adjoining property that can be built upon shall be in accordancewith Table 13.7.2.

Table 13.7.2 Minimum Distances for LP-Gas Containers That Operate Below 15 psi (103 kPa)

Water Capacity per Container

Aboveground Containers

gal m 3

ft m

≤70,000 ≤265

75 25

>70,000 >265

100 30


49 CFR § 173.115(a) has definitions for flammable gasses and § 173.120(a) has definitions for flammable and combustible liquids. They are not the same. With that determination, the LP-Gas Code has nothing concerning separation distance requirements between refrigerated storage containers of LP-Gases and ambient-temperature storage containers of LP-Gases. It would seem that such separation distance requirements would be included in the code. I know of one site, the Dixie Pipeline terminal in Apex, NC, where a refrigerated tank and ambient-temperature tanks are both present. I expect there are others, too.Other places in the LP-Gas Code refer to separation from important buildings. The only places that specify “occupied buildings” are 13.7.1 and 13.7.2. These should be changed to “important buildings” for consistency. Additionally, by using “occupied buildings,” it could be argued that the separation requirements would change as the building’s status, occupied or unoccupied, changed during the day.




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Revised Chapte 15

Chapter 15 Operations and Maintenance

15.1* Scope. This chapter includes requirements related to the operations and maintenance ofbulk plant, industrial plant, refrigerated, marine, and pipeline LP-Gas systems. The provisions ofthis chapter apply to all new and existing installations.

15.1.1 If stated elsewhere in the code, operation and maintenance requirements are referencedto those sections.

15.1.2* Multiple containers in vapor service only, with an individual water capacity not exceeding1200 gal (4.5 m3) water capacity, and with a maximum aggregate of 6000 gal (22.7 m3) watercapacity, shall not require written operations or maintenance procedures where they are notmanifolded together.

15.1.3* Containers or equipment at bulk plants and industrial plants that have been determinedto be unsuitable for continued service shall be taken out of service.

15.2 Operating Requirements.

15.2.1* Operating Procedures.

15.2.1.1 Operating procedures shall address all aspects of LP-Gas transfer, as appropriate forthe facility, including inspection of hose and fittings and connection and disconnectionprocedures.

15.2.1.2 Operating procedures shall include operator actions to be taken if flammableconcentrations of flammable liquids or gases are detected in the facility using fixed detectors,portable detectors, operating malfunctions, or the human senses.

15.2.1.5 Each facility shall prepare and maintain in a common location or locations writtenoperating procedure manuals that contain the written operating procedures.

15.2.1.6* Facilities that are not attended shall have the internal valves and emergency shutoffvalves of the container closed unless the facility is in use or the valve is required to be open tomaintain a process or system.

15.2.2 Content of Operating Procedures.

15.2.2.1 Written procedures shall be the basis for conducting activities associated with thesystems referenced in section 15.1.

(A) Operating procedures shall be updated whenever a change occurs that affects the operationof a system and prior to its start-up.

(B) The written procedures shall address the requirements in 15.3 and 15.4, where applicable.

15.3 Operating Requirements for Bulk Plants and Industrial Plants

15.3.1 Container Operations

15.3.1.1 Containers that show excessive denting, bulging, gouging,

or corrosion shall be removed from service in accordance with 5.2.1.4

15.3.1.2 Storage of flammable liquids shall be in accordance with 6.5.3.3.

15.3.1.3 The surface on which temporary containers are placed shall be maintained inaccordance with 6.8.5.2.


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15.3.1.4 Temperature-sensitive elements of emergency shutoff valves shall not be painted orcoated in accordance with 6.14.7

15.3.1.5 Welding on containers shall be in accordance with 6.8.1.2.

15.3.1.6 Venting of contaniers shall be in accordance with 7.3.2

15.3.1.7 The quantity of LP-Gas in containers shall be in accordance with 7.4

15.3.1.8 Paint and coatings on containers shall be maintained.

15.3.2 Cylinder Operations

15.3.2.1 A cylinder with an expired requalification date shall not be refilled until it is requalifiedby the methods prescribed in DOT regulations. [58: 5.2.2.3]

15.2.2.2 Where LP-Gas cylinders are to be stored or used in the same area with othercompressed gases, the cylinders shall be marked to identify their content in accordance withCGA C-7, Guide to the Preparation of Precautionary Labeling and Marking of Compressed GasContainers. [58: 6.5.3.12].

15.3.3 Hose Inspection Inspection of hose assemblies shall be in accordance with 7.4.2

15.3.4 Transfer Operations.

15.3.4.1 Transfer personnel requirements shall be in accordance with 7.2.1.

15.3.4.2 Filling and evacuation of containers shall be in accordance with 7.2.2.

15.3.4.3 Control of sources of ignition and smoking during transfer operations shall be inaccordance with 7.2.3.2 and 9.4.10

15.3.4.4 The arrangement and operation of transfer systems shall be in accordance with 7.3.2.

15.3.4.5 Transfers to containers serving industrial equipment requiring refueling in the field shallbe in accordance with 7.2.3.5.

15.3.5.6 Public access to storage and transfer areas shall be in accordance with 7.2.3.1.

15.3.4.7 Transfer hose at dispensing stations shall be secured in accordance with 6.27.4.1(3).

15.3.4.8 Railcar transfer operations shall be in accordance with 7.2.3.6, 7.2.3.7 and 7.2.3.8.

15.3.5 Cargo Tank Motor Vehicle Operations

15.3.5.1 Parking of cargo tank motor vehicles at bulk plants and industrial plants shall be inaccordance with 6.26.8.4

15.3.5.2 The use of wheel stops shall be in accordance with 9.4.8.

15.3.5.3 Cargo tank motor vehicles unloading into storage containers shall be located andoriented in accordance with 7.2.2.3

15.3.6 Vaporizer Operating Procedures. Operating procedures for vaporizers shall includemaintenance of vaporization rate, pressure control, and temperature. Procedures shall includespecific actions to be taken when parameters exceed normal operating limits and criteria foremergency shutdown.

15.3.7 Firefighting Operations. LP-Gas firefigting shall be in accordance with 6.29.4.3.

15.3. Refrigerated Liquid Operating Procedures . In facilities where propane is stored as arefrigerated liquid, operating procedures shall include monitoring of liquid temperature andpressure and procedures to be taken if the temperature or pressure exceeds operating limits.These procedures shall minimize the release of flammable gases to the atmosphere.

15.4 Operations Requirements for Marine Shipping and Receiving

15.4.8.1 Marine transfer requirements shall be in accordance with Section 14.4.

15.4.8.2 Medical First-Aid Equipment and Fire Extinguishers at marine terminals. Medical First-Aid Equipment and Fire Extinguishers shall be in accordance with 14. 2.1.13


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15.5* Maintenance Manuals and Procedures.

15.5.1 Maintenance Procedures. Written maintenance procedures shall be the basis formaintaining the mechanical integrity of LP-Gas systems.

15.5.1.1 Procedures shall be updated whenever a change occurs that affects the maintenanceof a system.

15.5.1.2 Persons who perform maintenance on LP-Gas systems shall be trained in the hazardsof the system and in the maintenance and testing procedures applicable to the installation.

15.5.1.3 Any maintenance contractor shall ensure that each contract maintenance employee isso trained or under the

immediate supervision of such a trained person to perform the maintenance procedures.

15.6 Maintenance Procedures for Bulk Plants and Industrial Plants

15.6.1 Container Maintenance.

15.6.1.1 Paint and coatings on containers shall be maintained.

15.6.1.2 The part of an ASME container in contact with saddles, foundations, or masonry shallbe in accordance with 6.8.3.5

15.6.1.3 Sacrificial anode cathodic protection systems shall be monitored by testing, the resultsshall be documented, and confirming tests shall be conducted in accordance with 6.19.3.1 and6.19.3.2.

15.6.1.4 Impressed current cathodic protection systems shall be monitored and tested inaccordance with 6.19.3.3.

15.6.1.5. Containers that have been involved in a fire and show no distortion shall be requalifiedin accordance with 5.2.1.2.

15.6.2 Hose Maintenance.

15.6.2.1 Hose assemblies failing the inspection specified in 7.2.4 shall be replaced, repaired, orcontinued in service based on the results of the inspection.

15.6.2.2 Flexible Hose Connectors. Flexible hose connectors on cargo tank motor vehiclesshall be replaced in accordance 9.4.3.7

15.6.3 Valve Maintenance. Emergency shutoff valves required by the code shall be testedannually in accordance with 6.14.10.


It is proposed to restructure Chapter 15 to provide specific section references to the operations and maintenance requirements in other chapters. The current structure cites a number of paragraphs in 15.2.2.2, 15.2.2.3, and 15.3.1.4. About half of these are not related to operations or maintenance. A detailed analysis of the paragraphs cited in 15.2.2.2, 15.2.2.3, and 15.3.1.4 has been completed and is attached to this proposal. The revised structure will make it much easier for operating and maintenance personnel to locate the operations and maintenance requirements in the code.




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15.1* Scope.

This chapter includes requirements related to the operations and maintenance of bulk plant,industrial plant, refrigerated, marine, and pipeline LP-Gas systems. The scope is limited tofacilities that store or transfer LP-Gas to and from cargo tank vehicles;ships; and pipelines nototherwise regulated by the U.S Department of Transportation. The provisions of this chapterapply to all new and existing installations.

15.1.1

If stated elsewhere in the code, operation and maintenance requirements are referenced tothose sections.

15.1.2*

Multiple containers in vapor service only, with an individual water capacity not exceeding

1200 gal (4.5 m3) water capacity, and with a maximum aggregate of 6000 gal (22.7 m3) watercapacity, shall not require written operations or maintenance procedures where they are notmanifolded together.

15.1.3*

Containers or equipment at bulk plants and industrial plants that have been determined to beunsuitable for continued service shall be taken out of service.


It was never the intent (see development of Chapter 11 in 2001 edition of NFPA 58) to include vapor distribution systems or all liquid service systems. It is made clear in the supporting statements for the first version of this chapter that it was intended to apply only to bulk plant and industrial plant installations.








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Public Input No. 58-NFPA 58-2017 [ Section No. 15.1 [Excluding any Sub-

Sections] ]

This chapter includes requirements related to the operations and maintenance of bulk plant,industrial plant, refrigerated, marine, and pipeline LP-Gas systems. The provisions of thischapter apply to all new and existing installations.


1. Requirements for operation and maintenance of pipeline systems were removed from the 2011 edition of the Code2. This paragraph is deleted as part of a complete revision of Chapter 15 presented in a separate proposal. The revisions will make the chapter more usable for plant operators.




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Public Input No. 109-NFPA 58-2017 [ Sections 15.1.1, 15.1.2, 15.1.3 ]

Sections 15.1.1, 15.1.2, 15.1.3

15.1.1

If stated elsewhere in the code, operation and maintenance requirements are referenced tothose sections.

15.1.2 *


1200 gal (4.5 m 3 ) water capacity, and with a maximum aggregate of 6000 gal (22.7 m 3 )water capacity, shall not require written operations or maintenance procedures where they arenot manifolded together.

15.1.3 *

Containers or equipment at bulk plants and industrial plants that have been determined to beunsuitable for continued service shall be taken out of service.


These paragraphs are not being deleted. They will appear in a separate prosal to revise Chapter 15.




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15.1.2 *


1200 gal (4.5 m 3 ) water capacity, and with a maximum aggregate of 6000 gal (22.7 m 3 )water capacity, shall not require written operations or maintenance procedures where they arenot manifolded together.



The current subsection 15.1.2 was adopted into the 2008 edition of the code because the definitions of “bulk plant” and “industrial plant” were vague. The current definition of a bulk plant in Chapter 3 is clear in that it states that the container is in liquid service and the container size exceeds 4,000 gallons water capacity. The definition of industrial plant also hinges on a container greater than 4,000 gallons water capacity, although it does allow for a vapor distribution system.



Public Input No. 183-NFPA 58-2017 [Section No. 15.1] Companion Change

Public Input No. 185-NFPA 58-2017 [Section No. A.15.1.2]





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15.2 Operating Requirements.

15.2.1 * Operating Procedures.

15.2.1.1

The procedures required in 15.2.1 shall address all aspects of LP-Gas transfer, as appropriatefor the facility, including inspection of hose and fittings and connection and disconnectionprocedures.

15.2.1.2

Operating procedures shall include operator actions to be taken if flammable concentrations offlammable liquids or gases are detected in the facility using fixed detectors, portable detectors,operating malfunctions, or the human senses.

15.2.1.3

Operating procedures for vaporizers shall include maintenance of vaporization rate, pressurecontrol, and temperature. Procedures shall include specific actions to be taken whenparameters exceed normal operating limits and criteria for emergency shutdown.

15.2.1.4

In facilities where propane is stored as a refrigerated liquid, operating procedures shall includemonitoring of liquid temperature and pressure and procedures to be taken if the temperature orpressure exceeds operating limits, which shall minimize the release of flammable gases to theatmosphere.

15.2.1.5

Each facility shall prepare and maintain in a common location or locations written operatingprocedure manuals that contain the written operating procedures required by 15.2.1 .

15.2.1.6 *

Facilities that are not attended shall have the internal valves and emergency shutoff valves ofthe container closed unless the facility is in use or the valve is required to be open to maintain aprocess or system.

15.2.1.7 *

Container openings serving an engine fuel (LP-Gas) refueling system are exempt from therequirements of 15.2.1.6 .

15.2.2 Content of Operating Procedures.

15.2.2.1

Written procedures shall be the basis for conducting activities associated with the systemsreferenced in Section 15.1 .

(A)

Operating procedures shall be updated whenever a change occurs that affects the operation ofa system and prior to its start-up.

(B)

The written procedures shall address the requirements in 15.2.2.2 and 15.2.2.3 , whereapplicable.


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15.2.2.2

General operating procedures shall include the following:

(1) General procedures (see Section 14.4 )

(2) Combustible material (see 6.5.3.3 and 6.8.5.2 )

(3) Sources of ignition (see Section 6.25 , 6.26.8.4 , 7.2.3.2 , and 9.4.10 )

(4) Signage and markings [see 5.2.1.1 , 5.9.3.6 , 5.9.5 , 5.9.8.5 , 6.5.3.12 , 6.13.5 ,6.14.6 , 6.14.7 , 6.14.12.1 , 6.27.3.17 , 6.27.3.18 , 6.29.4.4 , 6.30.4.3(C) , 7.2.3.6 ,9.3.2.10 , 9.3.3.7 , 9.4.6 , 11.3.4 , Section 11.12 , and 14.2.1.13 (3)]

(5) Containers (see 5.9.3.3 , Section 6.8 , 6.30.3.1 , 7.3.2 , 7.3.2.2 , 7.3.2.3 , 7.3.2.4 ,7.4.2 , 7.4.3 , 8.2.1 , and 9.3.2.4 )

(6) Security and access (see 7.2.3.1 )

(7) Fire response (see 6.29.4.3 )

15.2.2.3

Loading and unloading procedures shall include the following:

(1) Hose (see 6.27.4 , 7.2.4 , and 14.4.6 )

(2) Chocks [see 7.2.3.6 (2) and 9.4.8 ]

(3) Fire extinguishers (see 6.29.4.2 , Section 8.5 , 9.4.7 , and 14.2.1.13 )

(4) Sources of ignition [see 7.2.3.2 , 7.2.3.5 , 7.2.3.8 (2), 7.2.3.8 (3), and 9.4.10 ]

(5) Personnel (see 7.2.1 )

(6) Containers (see 5.2.2.1 , 5.2.2.2 , 7.2.2.1 , 7.2.2.2 , 7.2.2.3 , 7.2.2.4 , 7.2.2.5 ,7.2.2.8 , 7.2.2.12 , 7.2.2.16 , 7.2.3.3 , 9.3.2.6 , 9.3.2.7 , and 9.3.2.8 )

(7) Signage (see 7.2.3.6 )

(8) Security and access (see 7.2.3.1 )

(9) Fire response (see 6.29.4.3 and 6.29.4.4 )

(10) Ammonia contamination (see Section 4.5 )


This paragraph is deleted as part of a complete revision of Chapter 15 presented in a separate proposal. The revisions will make the chapter more usable for plant operators.




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15.2.1.1

The procedures required in 15.2.1 OPerating procedures shall address all aspects of LP-Gastransfer, as appropriate for the facility, including inspection of hose and fittings and connectionand disconnection procedures.


Editorial revision for clarity.




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15.3 * Maintenance.

15.3.1 Maintenance Procedures.

Written maintenance procedures shall be the basis for maintaining the mechanical integrity ofLP-Gas systems.

15.3.1.1

Procedures shall be updated whenever a change occurs that affects the maintenance of asystem.

15.3.1.2

Persons who perform maintenance on LP-Gas systems shall be trained in the hazards of thesystem and in the maintenance and testing procedures applicable to the installation.

15.3.1.3

Any maintenance contractor shall ensure that each contract maintenance employee is sotrained or under the immediate supervision of such a trained person to perform themaintenance procedures.

15.3.1.4

The written procedures shall address the following requirements, where applicable:

(1) Corrosion control [see 5.2.1.4 , 6.8.1.4 , 6.8.3.5 , Section 6.19 , 6.8.6.1(I) ,6.8.6.2(A) , 6.8.6.3(A) , and 6.8.6.3(F) ]

(2) Physical protection (see 5.9.7.2 , 6.8.1.2 , and 6.27.3.12 )

(3) Hose (see 6.27.4.1 , 7.2.4 , 9.4.3.7 , and 14.4.6 )

(4) Piping (see 6.11.3.10 and 6.14.7 )

(5) Appurtenances (see 6.9.2.4 and 6.14.10 )

(6) Containers [see 5.2.1.2 , 5.2.3.2 , 5.9.1.4 , 5.9.4.4 , 13.3.3.4 , 13.3.4.3 (4),13.3.4.4 , and 13.3.4.6 ]

(7) Cylinders (see 5.2.3.2 )

(8) Underground containers [see 6.8.6.1 (J) through (O)]

15.3.2 Maintenance Manuals.

15.3.2.1 Storage of Manuals.

(A)

Maintenance manuals for all equipment at an attended facility shall be kept at the facility andshall be available to maintenance personnel.

(B)

Manuals for unattended facilities shall be permitted to be kept at the facility or stored at alocation where they will be accessible for maintenance personnel servicing the unattendedlocation.


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15.3.2.2

Maintenance manuals shall include routine inspections and preventative maintenanceprocedures and schedules.

15.3.2.3 Record of Maintenance.

(A)

Each facility shall maintain a record of all maintenance of fixed equipment used to store andtransfer LP-Gas.

(B)

Maintenance records for normally unattended facilities shall be maintained at the unattendedfacility or at another location.

15.3.2.4

Maintenance records shall be made available to the authority having jurisdiction during normaloffice hours.

15.3.2.5

Maintenance records shall be retained for the life of the equipment.

15.3.3 Maintenance of Fire Protection Equipment.

15.3.3.1

Facilities shall prepare and implement a maintenance program for all plant fire protectionequipment.

15.3.3.2

Maintenance activities on fire protection equipment shall be scheduled so that a minimum ofequipment is taken out of service at any time and is returned to service in a reasonable periodof time.

15.3.3.3

Water-based automatic fire-extinguishing systems shall be maintained in accordance withNFPA 25.

15.3.3.4

Portable fire extinguishers shall be maintained in accordance with NFPA 10.


This section is deleted as part of a complete revision of Chapter 15 presented in a separate proposal. The revisions will make the chapter more usable for plant operators.




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Public Input No. 201-NFPA 58-2017 [ New Section after A.11.3.1 ]

A.11.3.3.1 Excessive denting, bulging, gouging and corrosion can be determined usingeither the CGA C-6 or CGA-C6.3 for cylinders or the NBIC for ASME containers.


This is helpful information for the users of the code.








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Public Input No. 216-NFPA 58-2017 [ New Section after A.11.9.1.2 ]

A.11.10.1.2 Installing piping in a manner that protects it from damage can includespecific routing of the pipe or tubing within the frame or shielding with externalprotection or other methods.


The text in Annex A is proposed to emphasize that using the vehicle frame to protect piping is an acceptable method of compliance.



Public Input No. 215-NFPA 58-2017 [Section No. 11.10.1.2] Com[anion Proposal





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Public Input No. 229-NFPA 58-2017 [ Section No. A.12.5.4(1) ]

A.12.5.4(1)

This requirement differs from that in 11.8.4.1 in that it will permit permits deformation of thestructural components attached to the ASME container. This allows the components to absorbpart of the forces that would be generated upon impact to the vehicle that may be traveling atrelatively higher speeds than those addressed in Chapter 11.


This is a companion change to P.I. 212 in Section 11.8.4.1.








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Public Input No. 185-NFPA 58-2017 [ Section No. A.15.1.2 ]

A.15.1.2

Industrial and some other installations with a capacity of 10,000 lb (454 kg) or more might berequired by EPA regulations to have an operation and maintenance manual.



The current subsection 15.1.2 was adopted into the 2008 edition of the code because the definitions of “bulk plant” and “industrial plant” were vague. The current definition of a bulk plant in Chapter 3 is clear in that it states that the container is in liquid service and the container size exceeds 4,000 gallons water capacity. The definition of industrial plant also hinges on a container greater than 4,000 gallons water capacity, although it does allow for a vapor distribution system.



Public Input No. 184-NFPA 58-2017 [Section No. 15.1.2] Companion Proposal





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Public Input No. 5-NFPA 58-2017 [ New Section after A.3.2.3 ]

Explanatory information for Assembly Occupancy

A.3.2.3 Assembly Occupancy. Assembly occupancies might include the following:

(1) Armories

(2) Assembly halls

(3) Auditoriums

(4) Bowling lanes

(5) Club rooms

(6) College and university classrooms, 50 persons and over

(7) Conference rooms

(8) Courtrooms

(9) Dance halls

(10) Drinking establishments

(11) Exhibition halls

(12) Gymnasiums

(13) Libraries

(14) Mortuary chapels

(15) Motion picture theaters

(16) Museums

(17) Passenger stations and terminal of air, surface, underground, and marine publictransportation facilities

(18) Places of religious worship

(19) Pool rooms

(20) Recreation piers

(21) Restaurants

(22) Skating rinks


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(23) Special amusement buildings, regardless of occupant load

(24) Theaters

Assembly occupancies are characterized by the presence or potential presence of crowds withattendant panic hazard in case of fire or other emergency. These are generally open oroccasionally open to the public, and the occupants, who are present voluntarily, are notordinarily subject to discipline or control. Such buildings are ordinarily occupied by able-bodiedpersons and are not used for sleeping purposes. Special conference rooms, snack areas, andother areas incidental to, and under the control of, the management of other occupancies, suchas offices, fall under the 50-person limitation.

Restaurants and drinking establishments with an occupant load of fewer than 50 persons shouldbe classified as mercantile occupancies. For special amusement buildings, see 16.4.7 of NFPA5000.

Note that, in addition to assembly occupancy, the term public assembly would also apply tooutdoor areas where members of the public assemble.


The definition for Assembly Occupancy is extracted from NFPA 101, Life Safety Code, as is most this annex material. This term, undefined in NFPA 58, is used in section 6.23.2.3 and in Table 8.3.1(a) and needs to be defined for proper application of the requirements in those references.







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A.3.2.5 Listed.

The means for identifying listed equipment may vary for each listing organization concernedwith product evaluation; some organizations . Some authorities having jurisdiction do notrecognize equipment as listed unless it is also labeled, which serves as a means to identify thelisting organization . The authority having jurisdiction should utilize the system employed by thelisting organization to identify a listed product. Information about the listing organization and thestandards used may be found online or by contacting the listing organization.


The definition of ‘Listed” is an official NFPA definition and cannot easily be changed. Therefore, the explanatory text in Annex A provides needed clarification to the term. Confusion in the industry is based on the misconception that only a specific testing/certification organization can be used to test and certify products, which is not the case. This proposal will help to illustrate this fact.




Affilliation: NPGA Technology Standards and Safety Committee

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Public Input No. 29-NFPA 58-2017 [ New Section after A.4.7(2) ]

A.4.8The independent inspector can be the Authority Having Jurisdiction, insurancecompany, independent consultant, or for a company with multiple plants, an inspectorwho reports to a central safety or engineering group. The intent of the inspection is toverify that the plant has not been altered since construction, and that any revisionsmandated by the Code since have been implemented.


Provide explanatory information on who can do the bulk and industrial plant inspections.




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Submittal Date: Mon Apr 03 09:08:37 EDT 2017


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A.6.4.1.1 (Applies to Table 6.4.1.1) The container separation distance for containers larger than30,000 gallons is ¼ of the sum of the diameters of the adjacent containers. As an example,assume four 60,000 gallon containers with an outside diameter of12 ft. installed in a row alongthe shell sides. The distance between the first and second containers is ¼ of the diameter ofthe one adjacent container, the second container, or 12 times ¼, or 3 ft. The distance betweenthe second container and its two adjacent containers, numbers 1 and 3, is 2 times 12 ft. times¼, or 6 ft.


Annex text is added to provide an example of the calculation of 1/4 of the sum of adjacent containers in Table 6.4.1.1. While the calculation is not complex, the word "adjacent" is not completely clear. It could be interpreted that only the adjacent container diameters are summed (and not the container in question), or it could be interpreted that where 3 containers are installed in a row, the term adjacent applies to all 3 containers. This new annex text provides the committee's intent.



Organization: TLemoff Egineering

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A.6.4.3.1 (D) See the attached drawings for a depiction of the requirements in thissection.



Tdc-1828_Drawings.docx Case 1 and Case 2 for Multi-Cylinder Installations


These drawings are in support of the changes to 6.4.3 and serve to more clearly explain the intent of that section.



Public Input No. 186-NFPA 58-2017 [Section No. 6.4.3] Companion Change





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Public Input No. 115-NFPA 58-2017 [ Section No. A.6.4.1.1 ]


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A.6.4.1.1


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When applying Table 6.4.1.1 to cylinders, which have their capacities expressed in pounds, the

first table entry, <125 gal (<0.5 m3), includes all cylinders. Cylinders have a maximum capacity

of 1000 lb or 119 gal (454 kg or 3.8 m3) (water capacity).

The “Line of Adjoining Property That Can Be Built Upon” refers to the property boundaries ofthe property adjacent to the one where the container is located. This is illustrated in FigureA.6.4.1.1, Figure I.1(a), Figure I.1(b), and Figure I.1(c) taking into consideration a condition thatinvolves property on the other side of a street, highway, navigable waterway, or other right ofway. The minimum distance limitation is from the container to the property line where thatproperty line is common to plots of ground of different ownership and would also apply betweenthe container and the property line of the far side of a street or other public right of way.

Regarding "Important Building," a building can be important for any number of reasons,including the following:

· Human occupancy

· Replacement value

· Value of the contents

· Vital role of its production equipment or business records to a business

· The effect of building location on product release and fire control activities by firefighters and other emergency responders

Human occupancy in a building does not automatically make it important. Occupancy for briefperiods, such as one might find in a garage while a vehicle is being loaded, should not be afactor in classifying a building as important.

Clearly, buildings that house assembly occupancies, such as theaters and churches, are“important” because the general public will be there, as well as at mercantile occupancies(stores). Homes, apartments, hotels, dormitories, and prisons should also be considered“important.” Storage occupancies may not be considered “important” if workers onlyoccasionally enter the building.

Buildings with characteristics that (1) hinder emergency responders from being able to gainaccess to a position where they can safely apply water to a tank or (2) act as an impediment toapplying water should also be considered a part of this category. There is such a wideassortment of physical configurations of industrial and bulk plant sites that each location mustbe considered on its own. Items such as railroad tracks, containers for storage of other fuels,fences obstructing access from preferred directions, topography, and even rows of trees canpresent unique challenges for access and, with the location of buildings on congested sites,can by themselves, or in combination, make applying water on the tanks extremely difficult.

Figure A.6.4.1.1 Illustration of Separation Distances from Containers to Line ofAdjoining Property That Can Be Built Upon.


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The existing code refers to “important building” in several areas for separation distances, etc. While the handbook offers a description of what constitutes an important building, there is no definition in Chapter 3 or information in the annex of NFPA 58 to provide clarification for AHJs and other code users.

“Important building” is a defined term in the following NFPA codes and standards: NFPA 1, NFPA 30, NFPA 35, NFPA 36 and NFPA 52. The definition is the same in all of those documents and reads as follows: “A building that is considered not expendable in an exposure fire.” Even though a formal definition exists in these documents, the determination of what constitutes “not expendable” is still a subjective decision in all cases. The information contained in this proposal should help to make that determination easier and more consistent.





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This is new annex material for 7.2.2.6 which was entered as Public Input No. 106.

In Public Input No. 106, there needs to be an asterisk directing the reader to the annex sectionfor this explanatory information.

A 7.2.2.6 CGA 791 and 793 connections are primarily used on consumer LP-Gas

equipment. Both connection designs employ the use of a face seal to seal the

male and female sides of the connection before gas flow occurs. Damage to the

face seal (e.g. cracking, gouging, tearing, roping, etc.) effects the sealing surfaces

that may result in a leak. Examples of (e.g. cracking, gouging, tearing, roping, etc.)

are as follows:

(See pictures in attac hment)

The CGA 791 and 793 connections as manufactured do not permit the

replacement of the face seal and the face seal design is not the same for all the

manufacturers. Therefore, if the face seal has been compromised the cylinder

valve must be replaced.



pcs_30872_attachments_1_.pdfExplanatory information for annex material in section A 7.2.2.6


The CGA 791 and 793 connections are primarily used for consumer LP-Gasapplications. There has been an increasing number of reported (primarily in theCGA 791 connection) leaks in the connection due to deterioration of theeffectiveness of the face seal in the connection. The reports indicate that propertydamage and or personal injury may occur if a leak is present. Although full rootcause analysis has not been completed, it is known that environmentalconditions, filling equipment and end user abuse may contribute to theeffectiveness of the seal. Visual inspection of the face seal before filling thecylinder will identify potential defects before the cylinder is filled. The face seal inthe CGA 791 and 793 is not replaceable and therefore if a defect is noted thecylinder valve must be replaced.



Public Input No. 106-NFPA 58-2017 [New Section after7.2.2.6]

Annex material to new section7.2.2.6


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NEW

* 7.2.2.6 Prior to filling a cylinder, the face seal on CGA 791 and 793 connections shallbe visually inspected for defects (e.g. cracking, gouging, tearing, roping, etc.). If adefect exists the valve shall be removed and replaced.

Renumber the paragraphs following this new paragraph through 7.2.2.17.

NEW

A 7.2.2.6 CGA 791 and 793 connections are primarily used on consumer LP-Gas equipment. Both connection designs employ the use of a face seal to seal the male and female sides of the connection before gas flow occurs. Damage to the face seal (e.g. cracking, gouging, tearing, roping, etc.) effects the sealing surfaces that may result in a leak. Examples of (e.g. cracking, gouging, tearing, roping, etc.) are as follows:

Cracking Gouging/Tearing Roping Filling Double Seal

The CGA 791 and 793 connections as manufactured do not permit the replacement of the face seal and the face seal design is not the same for all the manufacturers. Therefore, if the face seal has been compromised the cylinder valve must be replaced.

Technical Justification

The CGA 791 and 793 connections are primarily used for consumer LP-Gas applications. There has been an increasing number of reported (primarily in the CGA 791 connection) leaks in the connection due to deterioration of the effectiveness of the face seal in the connection. The reports indicate that property damage and or personal injury may occur if a leak is present. Although full root cause analysis has not been completed, it is known that environmental conditions, filling equipment and end user abuse may contribute to the effectiveness of the seal. Visual inspection of the face seal before filling the cylinder will identify potential defects before the cylinder is filled. The face seal in the CGA 791 and 793 is not replaceable and therefore if a defect is noted the cylinder valve must be replaced.





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Public Input No. 14-NFPA 58-2017 [ New Section after A.7.2.3.5(A) ]


A.7.3.4 Purging of piping systems that contain LP-Gas or air to replace that gas with

another gas will result in a flammable gas-air mixture being discharged at some point in the

purging process. NFPA 54 is limited to fuel gas systems operating up to 125 psig, and

NFPA 56 is required for any LP-Gas piping with a higher operating pressure


Annex text is added to explain why different standards are referenced for purging of LP-Gas piping systems.






Organization: TLemoff Engineerig

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Public Input No. 27-NFPA 58-2017 [ New Section after A.7.2.3.5(A) ]

A.7.2.3.6(3) This requirement may be satisfied by lining each switch providing access tothe unloading area against movement and securing each switch with an effectivelocking device, or by using derails, portable bumper blocks, or other equipment thatprovides an equivalent level of safey, as required by DOT regulations.


The present language has some ambiguity about when the caution sign and wheel chocks are to be in place. “Connected” can mean coupled to other cars or it can mean hoses are connected for transfer of product. The qualifier in (1) is added to remove the ambiguity. The wheel chocks use is clarified much as it is in 9.4.8, requiring blocking the wheels whenever the vehicle is loading, unloading, or parked. This may be a requirement above that of the DOT, but so is the requirement in 9.4.8 for wheel stops for cargo tank vehicles.

The DOT requirements are shown in 49 CFR 174.67, Tank Car Unloading. There are five requirements in subparagraphs (1) through (5). Items in (1), training, and (5), operating procedures, are covered elsewhere in the LP-Gas Code and need not be repeated here. The caution sign is covered in (4) and the wheel chocks are covered in (2). Item (3) is not repeated in the LP-Gas Code. It should be included here so that a person performing the transfer operation using the LP-Gas Code will be informed of all requirements. Exhibit 7.10 in the LP-Gas Code Handbook includes a derail device in the picture.

This proposed addition takes some language in 49 CFR 174.67, which is discretionary in nature, and adds it to the annex for the proposed new requirement in 7.2.3.6(3).



Public Input No. 26-NFPA 58-2017 [Section No.7.2.3.6]

Requirement language for this annexmaterial.




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Public Input No. 165-NFPA 58-2017 [ Section No. A.8.4.2.1 ]

A.8.4.2.1

The shelves should be made of any material with a flame spread index, in accordance withASTM E84, Standard Test Method for Surface Burning Characteristics of Building Materials , orANSI/UL 723, Standard for Test for Surface Burning Characteristics of Building Materials , ofless than 25 and should be of sufficient strength to support the cylinders.


This information needs to be in the body of the standard and not in an annex that is not mandatory. A separate public input proposes to add the information into the corresponding section in chapter 8.









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A.9.4.8

A wheel stop might consist of a chock block, curb, or parking barrier at the parking point orother means to prevent the cargo tank vehicle from unintended movement. A wheel stop is nota substitute for an operable parking brake. Use of a single wheel stop placed between wheelson tandem axles could be appropriate if the gap between the tire and the stop does not allowenough momentum to build up to roll over the stop.


The added text shows that use of a single wheel stop to prevent movement in either direction when used between wheels on tandem axles may be appropriate.







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Public Input No. 116-NFPA 58-2017 [ Section No. B.1.2 ]


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B.1.2 Approximate Properties of Commercial LP-Gases.


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The principal properties of commercial propane and commercial butane are shown in TableB.1.2(a) and Table B.1.2(b). Reasonably accurate property values for propane–butane mixturescan be obtained by computation, applying the percentages by weight of each in the mixture tothe values for the property desired to be obtained. Slightly more accurate results for vaporpressure are obtained by using the percentages by volume. Very accurate results can beobtained using data and methods explained in petroleum and chemical engineering data books.

Table B.1.2(a) Approximate Properties of LP-Gases (English)

Property

Commercial

Propane

Commercial

Butane

Vapor pressure in psi (absolute pressure) at:

70°F145 127 32 17

100°F218 196 52 37

105°F233 210 56 41

130°F315 287 84

69

Specific gravity of liquid at 60°F 0.504 0.582

Initial boiling point at 14.7 psia, °F –44 31

Weight per gallon of liquid at 60°F, lb 4.20 4.81

Specific heat of liquid, Btu/lb at 60°F 0.630 0.549

Cubic feet of vapor per gallon at 60°F 36.38 31.26

Cubic feet of vapor per pound at 60°F 8.66 6.51

Specific gravity of vapor (air = 1) at 60°F 1.50 2.01

Ignition temperature in air, °F 920–1,120 900–1,000

Maximum flame temperature in air, °F 3,595 3,615

Limits of flammability in air, percent of vapor in air–gas mixture:

Lower 2.15 1.55

Upper 9.60 8.60

Latent heat of vaporization at boiling point:

Btu per pound 184 167

Btu per gallon 773 808

Total heating values after vaporization:

Btu per cubic foot 2,488 3,280

Btu per pound 21,548 21,221

Btu per gallon 91,502 102,032

Table B.1.2(b) Approximate Properties of LP-Gases (Metric)

Property

Commercial

Propane

Commercial

Butane

Vapor pressure in kPa (absolute pressure) at:

20°C1 ,000 895 220 103


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Property

Commercial

Propane

Commercial

Butane

40°C1 ,570 1482 360 285

45°C1 ,760 1672 385 345

55°C2 ,170 1980 580 462

Specific gravity of liquid at 15.56°C 0.504 0.582

Initial boiling point at 1.00 atm pressure, °C –42 –1

Weight per cubic meter of liquid at 15.56°C, kg 504 582

Specific heat of liquid at 15.56°C, kJ/kg 1.464 1.276

Cubic meter of vapor per liter of liquid at 15.56°C 0.271 0.235

Cubic meter of vapor per kilogram of liquid at 15.56°C 0.539 0.410

Specific gravity of vapor (air = 1) at 15.56°C 1.50 2.01

Ignition temperature in air, °C 493–549 482–538

Maximum flame temperature in air, °C 1,980 2,008

Limits of flammability in air, percent of vapor in air–gas mixture:

Lower 2.15 1.55

Upper 9.60 8.60

Latent heat of vaporization at boiling point:

Kilojoules per kilogram 428 388

Kilojoules per liter 216 226

Total heating value after vaporization:

Kilojoules per cubic meter 92,430 121,280

Kilojoules per kilogram 49,920 49,140

Kilojoules per liter 25,140 28,100


This proposal will reintroduce the gauge pressure values that appeared in the 1998 edition of NFPA 58. It is necessary to use gauge pressure values instead of absolute pressure because gauge pressure is measured in the field and these tables are intended to be used by field technicians.





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Public Input No. 175-NFPA 58-2017 [ Section No. C.2.2.1 ]

C.2.2.1

The specification designation consists of a one-digit number, sometimes followed by one ormore capital letters, then by a dash and a three-digit number. The one-digit number alone , orin combination with one or more capital letters, designates the specification number. The three-digit number following the dash shows the service pressure for which the cylinder is designed.Thus, “4B–240” indicates a cylinder built to Specification 4B for a 240 psig (1650 kPag) servicepressure. (See C.2.2.3.)


Editorial revision for simplicity.




Affilliation: None

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Public Input No. 189-NFPA 58-2017 [ Section No. E.2.3.2 ]

E.2.3.2

Because no mechanical device can be expected to remain in operative condition indefinitely, it

is suggested that the pressure relief valves on containers of more than 2000 gal (7.6 m 3 )water capacity be tested at approximately 10-year intervals. valve manufacturer'srecommendations can be consulted for guidance on inspection.


The 10-year test period recommendation was arbitrarily determined and is inconsistent with manufacturer’s recommendations. Relying upon the manufacturer’s recommendations is more appropriate.





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Public Input No. 19-NFPA 58-2017 [ Chapter I [Excluding any Sub-Sections] ]

This annex is not a part of the requirements of this NFPA document but is included forinformational purposes only.

(1) The code referencesd in all 3 diagrams are not correct reference codes. However, theinformation within the content is correct.


Revise the code references within the diagrams. The content is still relevant.


Submitter Full Name: Chris Clark


Affilliation: City of Mesa, Sr. Fire Plans Examiner

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Submittal Date: Thu Feb 16 13:59:44 EST 2017


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Public Input No. 56-NFPA 58-2017 [ Section No. I.1 ]


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I.1 Spacing of Containers.

Figure I.1(a), Figure I.1(b), and Figure I.1(c) illustrate container spacing required in 6.4.1.

Figure I.1(a) Cylinders. (Figure for illustrative purposes only; code compliancerequired.)

Figure I.1(b) Aboveground ASME Containers. (Figure for illustrative purposes only;code compliance required.)

Revise Note (1) in Figure I.1 (b) by substituting "filled at the point of use" for "filled on site".

Figure I.1(c) Underground ASME Containers. (Figure for illustrative purposes only;code compliance required.)



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The term "filled on site" is open ended as any point where a container is filled is a site. The term "filled at the point of use" is clearer and will be understood by persons not in the propane industry.



Public Input No. 51-NFPA 58-2017 [Global Input]




Affilliation: None

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Public Input No. 164-NFPA 58-2017 [ Section No. N.1.2.4 ]

N.1.2.4 ASTM Publications.

ASTM International, 100 Barr Harbor Drive, P.O. Box C700, Conshohocken, PA 19428-2959.



ASTM B88, Standard Specification for Seamless Copper Water Tube, 2014.

ASTM B280, Standard Specification for Seamless Copper Tube for Air Conditioning andRefrigeration Field Service, 2013.

ASTM D638, Standard Test Method for Tensile Properties of Plastics, 2014.

ASTM D1835, Standard Specification for Liquefied Petroleum (LP) Gases, 2013.

ASTM D5305, Standard Test Method for Determination of Ethyl Mercaptan in LP-Gas Vapor,2012.

ASTM E84, Standard Test Method for Surface Burning Characteristics of Building Materials ,2015a.


The reference to ASTM E84 is proposed by another public input to be moved to the body of the document and needs to be deleted from this list of informational references. I have not checked the dates of the other standards.







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Public Input No. 142-NFPA 58-2017 [ Section No. N.1.2.14 ]

N.1.2.14 ULC Publications.

Underwriters’ Laboratories of Canada, 7 Underwriters Road, Toronto, ON, M1R 3A9,Canada. ULC Standards, 171 Nepean Street, Suite 400, Ottawa, ON K2P0B4

CAN/ULC S603.1, Standard for External Corrosion Protection Systems for Steel UndergroundTanks for Flammable and Combustible Liquids, 2011 2017 .


Update Standards








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Public Input No. 158-NFPA 58-2017 [ Global Input ...

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