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EPs Contractor : BUSHEHR MEG PLANT Owner:

Petrochemical IndustriesDesign & EngineeringCompany (PIDEC)

Project No. : 1216

MSS for Centrifugal CompressorBushehr PetrochemicalCompany (BUPC)

Project No. :BU20

PIDEC Doc. No.:1216-DE-00-RE-MSS-301 Owner Doc. No.: BU-20-D-000-MA-SPC-301 Rev. : 01 MC: ThinkXperT

MATERIAL STANDARD SPECIFICATION

FOR

CENTRIFUGAL COMPRESSOR

DE EXT CFL A

Eng. Phase Purpose Of Distri buti on (POD) Purpose Of Issue (POI) Owner's Action

01 21.07.2014 Certified Final A.Asadian A.Eskandari A.Eskandari A. Kadkhodaee

00 14.04.2014 Issued For Engineering A.Asadian A.Eskandari A.Eskandari A. Kadkhodaee

Rev. Date Description Prepared by Checked by Approved by Authorized by

This document with all its rights is the property of BUPC and must be held in confidence. No disclosure,reproduction or other use of the document in whole or parts is to be made without the prior consent of BUPC

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PageNo.

InternalIssue

Change Index During Formal Issues

Reason of L atest ChangeFirstIssue

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Rev. 0A Rev.00 Rev.01 Rev.02 Rev.03 Rev.04 Rev.05

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Revised as per client comment

11 Revised as per client comment

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Index Page

Introduction 4

Definitions 4CHAPTER 1 5General Requirements 51. General 5

1.1 Scope 51.2 Alternative Design 51.3 Conflicting Requirements 41.8 Complete Unit Responsibility 5

2. Basic Design 52.1 General 52.2 Materials 62.3 Casing 7

2.5 Rotating Element 82.6 Dynamics 92.8 Shaft End Seals 102.10 Lubrication and Sealing Systems 11

3. Accessories 113.1 Drivers 113.2 Couplings and Guards 113.3 Mounting Plates 123.4 Controls and Instrumentation 133.5 Piping and Appurtenances 143.6 Special Tools 14

4. Inspection, Testing, And Preparation for Shipment 144.1 General 144.2 Inspection 154.3 Testing 164.4 Preparation for Shipment 17

Annex 1F 18

CHAPTER 2 19Centrifugal and Axial Compressors 192. Basic Design 19

2.1 General 192.3 Casing 20

2.4 Guide Vanes, Stators, and Stationary Internals 212.7 Bearings and Bearings Housing 21

3. Accessories 224. Inspection, Testing, and Preparation for Shipment 23

CHAPTER 3 24Integrally Geared Compressors 242. Basic Design 24

2.1 General 242.7 Bearings and Bearings Housing 24

3. Accessories 25

4. Inspection, Testing, and Preparation for Shipment 25


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INTRODUCTION

ADDITIONAL ARRANGEMENT TO API 617(Addition)

The numbers and titles correspond to the API 617, 7thedition, July 2002, sections and paragraphs involved.

For API 617 paragraphs not addressed in this specification, vendor shall adhere strictly to the requirementsof API 617.

The type of change e.g. addition, substitution, modification or deletion is indicated in brackets for eachparagraph. For regulations or explanations that are not covered by API 617, new paragraphs have beenadded and are indicated with (New).

DEFINITIONS

The Purchaseris BUSHEHR Petrochemical Company (BUPC).

The Contractoris Petrochemical Industries Design and Engineering Company (PIDEC).

The Vendor/Manufacturer/Supplier is the party which manufactures or supplies equipment and services toperform the duties specified by the Contractor.

The Inspector is a person from Purchasers permanent organization of Inspection/QC section and/or fromthe qualified Inspection agencies of the Purchaser.


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CHAPTER 1

GENERAL REQUIREMENTS

1. GENERAL

1.1 SCOPE

1.1.2 (Addition)Equipment offered by vendor shall satisfy the following minimum service and manufacturingexperience requirements:

Compressors shall be identical or validly similar in power rating, speed, discharge pressure, suctioncapacity, process gas, mechanical design, materials and rotor dynamics as compared with at leasttwo units produced at the proposed manufacturing plant. These units must have had at least twoyears satisfactory operation.

As an alternative, vendor may show to the satisfaction of the Contractor/ Purchaser, that theequipment offered is comprised of components each of which individually satisfies the qualificationrequirements.

Equipment manufactured under license, in addition to satisfying the above requirements shall alsohave the licensor's written guarantee.

Corresponding requirements apply and shall also be satisfied by the driver, gear and auxiliaryequipment.

1.2 ALTERNATIVE DESIGN (Modif ication)Unless otherwise specified, pipe, pipe threading and flanges shall be based on U.S. standards.

1.3 CONFLICTING REQUIREMENTS (Modif ication)In case of conflict between the various documents, their order of precedence is as follows:

Purchase Order & Deviations thereto

Material Requisition& Data sheets

This Specification

Other General and/or Project Specifications

Referenced Codes and Standards

Vendors bid and Vendors drawings

Any conflicting requirements shall be called to the Contractor/Purchasers attention in writing forclarification before proceeding with manufacture of the affected parts.

1.8 COMPLETE UNIT RESPONSIBILITY (Modif ication)Compressors, gears, drivers and auxiliaries that make up a complete unit shall be ordered from oneManufacturer, usually the compressor Manufacturer. This Manufacturer shall be responsible for thedesign co-ordination and the satisfactory mechanical, aero- and thermo-dynamic performanceintegrity of the complete unit.Further, this Manufacturer shall warrant and guarantee all equipment and component parts asstipulated in the relevant specifications and purchase order.

2. BASIC DESIGN

2.1 GENERAL

2.1.1.3 (Addition)The Manufacturer shall also state the ability of the compressor to operate at all other conditionsspecified in the data/requisition sheets.


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2.1.8 (Modification)If not differently specified in the data sheet, compressors and auxiliaries shall be suitable for outdoorunprotected installation in the climatic zone specified in the Material Requisition.

The vendor shall describe the winterizing extent, if any required, and provide all the necessary clipsor supports for the insulation. Vendor shall also show on its drawings and P&I diagrams, items ofequipment and piping, which require tracing and/or lagging.

2.1.9 (Substitution)The overall sound pressure level measured at 1m from machine side in any directions shall belimited to 85 dB(A). Provisions of silencers, acoustic insulation and/or noise hood may be required tomeet the above required noise level.

Noise data shall be provided at bid stage. Vendor shall submit the data of expected sound pressurelevel per each octave band (in Hz) to Contractor/Purchaser for his approval.

2.1.16 (Substitution)When on the data sheet it is indicated that the compressor will be used for alternate service, e.g. airdrying at start-up, catalyst regeneration, etc., vendor shall provide the relevant performance curvesand shall indicate on proposal data sheets any special requirements to operate safely, includinguncoupling of part of the train, insertion of alternative seal, purging oil seals, etc.

2.1.17 (Addition)Vendor shall be responsible for determining the thermodynamic properties of the gases to becompressed based on the gas analysis data specified on the compressor data sheets.

2.1.18 (Addition)Asbestos and asbestos filling materials shall not be used. Non-asbestos gaskets and/or packingshall be used.

2.1.19 (Addition)Equipment exposed to the sunlight shall be designed for 85C as a minimum.

2.1.20 (Addition)Each compressor train shall have its own auxiliaries (i.e. lube oil system, seal gas system, unitcontrol panel etc.).

Common auxiliary systems may be proposed as an option.

2.2 MATERIALS

2.2.1 General

2.2.1.1 (Modification)Corrosion allowance of 3 mm shall be considered for all carbon steel (including 0.5 Mo) parts, whichare in contact with the process fluid.

2.2.1.2 (Modification)Materials of construction shall be as per ASTM/ASME standards. DIN, BS or any other well-knowninternational materials as substituted materials to ASTM/ASME ones can be selected, if they areequivalent or superior to ASTM/ASME ones. The certification should be presented. For majorcomponents the Vendor shall provide details as chemical composition and mechanical properties incase of non-ASTM or non-ASME materials.

2.2.1.3 (Modification)

Corrosion agent injection, if present in process gas stream, will be identified in the data sheets.

2.2.1.6 (Modification)In corrosive gas service (wet H2S, wet CO2, etc.) at least the first two impellers of each section shallbe made of 13% Chr. or better material.


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2.2.1.15 Low Temperature

2.2.1.15.1(Substitution)Vendor shall exercise caution in the selection of steel materials intended for service between -29C(-20 F) and 40C (100 F). For the selection of materials other than Austenitic Stainless Steel forservice below -29C (-20 F), vendor shall require a Charpy V-notch impact test. Steels shall havean impact strength at the specified minimum design temperature sufficient to qualify under theminimum Charpy V-notch impact energy requirements of the ASME Code, section VlIl, division 1,paragraph UG-84. Paragraph UCS-66 of the Code shall be used to establish impact testingexceptions for Steels. Curve A shall be used for all Steel materials, including castings, which are notspecifically listed for Curves B, C or D. Vendor shall state in his proposal when thickness is notcovered by the Code.

2.3 CASING

2.3.1 Pressure-Containing Casings

2.3.1.10.1(Modification)Standard procedures for casting repairs shall be submitted to Purchaser for approval prior to startingthe casting work.

Unacceptable imperfections shall be removed and their complete removal shall be verified byadditional examination. All the finished surfaces by repair welding shall be inspected according to thesame quality standard that was applied to inspect the casting.

The casting defect, which corresponds to any of the following items, shall be considered as a majordefect:

Having leaked during hydrostatic test due to the defects The depth of any cavity prepared for repair welding exceeds 20 % of the wall thickness or 25 mm

(1 in.), whichever is smaller

Any cavity prepared for welding is greater than approx. 6500 mm2 {10 in2} in area.

For the major defects, defect and repair maps shall be prepared and submitted to Purchaser forreview and approval prior to starting the repair work. On these maps, the extent, the location of thedefect and details of the repair procedure shall be indicated.Welding repairs of major defects for pressure-retaining castings shall be stress relieved, heat-treatedafter the welding and shall be radiography tested.

2.3.1.12 Material Inspection of Pressure-Containing Parts

2.3.1.12.1(Modification)Butt welded joints of pressure containing casings shall be 100% X-Ray examined.

2.3.2 Pressure Casing Connections

2.3.2.1 General

2.3.2.1.1 (Modification)All connections (process/auxiliaries) on casing shall be flanged.Machined and studded and threaded connections are not allowed.

2.3.2.1.3(Modification)All nozzles for piping connections on pressure casing shall be flanged. Threaded connections or seal

welded are not allowed.

2.3.2.1.7 (Modification)Vent and drain connections shall be provided with valves. Drains shall be furnished on all casings,and drain lines shall be provided and brought out to edge of the baseplate and individually valved.


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Drain valves shall be grouped and readily accessible from the operating floor level. Flanged valvedvent and drain connections are acceptable for compressors with Molecular Weight > 10. Forapplications with Molecular Weight < 10, they shall be butt-welded.

2.3.2.2 Main Process Connections

2.3.2.2.1(Modification)

If not otherwise specified studded connections shall not be provided.

Sufficient provision shall be made to permit isolating, relieving and purging of the compressor in caseinternal inspection or repair shall be incorporated.

2.3.2.2.2 (Substitution)Unless otherwise specified flanges smaller or equal than 24 inches shall conform to ASME B16.5.Flanges equal or larger than 26 inches shall conform to ASME B16.47 series B.

Unless otherwise specified, on RF flanges the gasket contact surface shall have concentric orcontinuous spiral grooves, resulting in a roughness height within the range of 125 to 250 AARH inaccordance with ASME B16.5 while on RTJ Flanges the range shall be 32-63 AARH.

2.3.2.2.12 (Addition)The vendor shall state the minimum runs of straight pipe required at the inlet, as well as any side-stream connections.

2.3.2.3 Auxiliary Connections

2.3.2.3.3(Substitution)Auxiliary connections shall be welded and flanged or machined and studded. Socket welded

connections are not permitted where there is a possibility of crevice corrosion or in applicationswhere there is a potential for cracking. Socket welded connections are not allowed on lube oil anddry gas seal connections. All welded connections shall be full penetration. Openings smaller than DN25 (NPS 1) shall be reinforced. No casing connection shall be smaller than DN 20 (NPS ).

2.3.2.3.4.1 (Modification)Each pipe nipple shall be provided with a welding neck flange. Slip-on flanges are not allowed.

2.3.2.3.5 Requirements for Threaded Connections (Modification)Threaded openings shall not be used on compressor casing.

2.5 ROTATING ELEMENT

2.5.1 (Modification)If not otherwise specified the coupling shaft end shall be designed for hydraulically fitted coupling.

2.5.4 (Modification)Impeller stresses at the maximum continuous speed shall not exceed 70% of the material yieldstrength.

The minimum and maximum material strength and the actual stress of each impeller @ maximumcontinuous speed shall be stated in the proposal.

2.5.5 (Modification)Replaceable thrust collars shall be hydraulically fitted and positively locked into position.

2.5.10 Impellers

2.5.10.1 (Modification)Cast and riveted impellers are not acceptable.Each impeller shall be marked with a unique identification number.


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2.6 DYNAMICS

2.6.1.4 (Modification)For compressor trains having other than gas turbine drivers, the compressor vendor shall have theunit responsibility for the entire system consisting of compressor, driver, power transmission, andassociated auxiliary equipment.

For gas turbine driven compressors, the unit responsibility shall be assumed by the gas turbinevendor.

2.6.1.5 (Addition)Both torsional and lateral analyses are under the complete responsibility of the compressor vendor.This vendor shall furnish a copy of these analyses and of the related data for review and approval.

2.6.2 Lateral Analysis

2.6.2.6 (Modification)A train lateral analysis shall be performed for all compressors.

2.6.2.14(Modification)Delete from this clause the words: When specified.

2.6.2.15 (Addition)An additional plot of an unbalance sufficient to cause vibration amplitude at the probe locations ofthe vendor recommended alarm (alert) level at rated speed, showing the amplitude(s) at the seallocations along the shaft when the machine is operated through any resonance, including coastdown from trip speed, shall be provided. In placing this weight, consideration shall be given to thelocation(s) most likely to experienced unbalances during normal operation (impeller deposits, etc.).

2.6.2.16 (Addition)Supplier shall carry out a rotor stability analysis considering all sources of destabilization, taking intoaccount the highest density that can be encountered with the specified gas compositions.

The calculated log decrement shall have a minimum positive value of 0.2 over the complete speedrange.

2.6.7 Torsional Analysis

2.6.7.1 Unless otherwise specified, a torsional vibration analysis shall be performed for all the compressorunits.

2.6.8 Vibration and Balancing

2.6.8.7 (Modification)Delete the words when specified In this clause.

Add to this clause:

When an operating speed balance is performed, the low speed balance shall be checked. This isdone to provide a reference of residual unbalance and phase for future use in a low speed balancemachine.

2.6.8.12(Addition)Unbalance of rotating assembly shall not be corrected by modification of the replaceable parts suchas sleeves, coupling and thrust collar.

2.6.8.13 (Addition)Spare rotors ordered with compressors shall be balanced to the same degree as the main rotor.


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2.7.4 Bearing Housings

2.7.4.1 (Modification)Irrespective of the type of coupling or coupling guard, compressors shall have drive-end bearinghousing shaft seals to prevent oil leakage toward coupling.

2.7.4.3 (Modification)All oil return lines shall be stainless steel made, type 304 or 316, and they shall be furnished withsight flow indicators.

2.8 SHAFT END SEALS

2.8.1.1 (Addition)If rapid de-pressurization is specified, the Manufacturer shall confirm that the shaft seals and thesealing system are suitable for this and describe the relevant design features.

2.8.4 Self Acting Dry Gas Seal

2.8.4.1 (Modification)For air compressors labyrinth seal shall be utilized.

Self-acting dry gas seals shall be used for sealing systems when they are compatible with handlinggas (toxic or flammable gases). Self-buffer gas of suitable temperature may be introduced from thecompressor discharge or inter-stage.

Unless otherwise specified, self-acting dry gas seals shall be of tandem arrangement with anoutboard additional isolating seal (floating carbon ring, labyrinth or equivalent type) using nitrogen asseparation gas.

The design shall prevent process gas leakage into the lube oil system or oil leakage and migrationinto the seal face area.

Proven materials of components shall be used for dry gas seals to guarantee run time of three year,minimum.

A tandem seal with an internal labyrinth seal and inert gas buffer or a double pressurized sealshall be selected for toxic applications, and whenever required to reduce process gas emission to anabsolute minimum.

The expected and guaranteed consumption of buffer gas and separation gas shall be stated atproposal stage.

Vendor shall check start-up, operating and shutdown conditions in design of dry gas sealing system.The source of buffer gas and separation gas shall be specified for all the above-mentionedconditions and submitted during the bid stage.

Any compressor seal system shall have a buffer flow indicator.

2.8.4.4 (Modification)If suitable and referenced for the specified service, vendor shall propose seals of the bi-directionaltype.

2.8.4.5 (Addition)A stainless steel seal, buffer/barrier, purge and separation gas system, as applicable, including

piping harness, filtering facilities, instrumentation and controls, shall be provided fully installed oncompressor skid.Minimum requirements of API 614 (Edition 5) Chapter 4 shall apply.

01


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2.8.4.6 (Addition)The seal and/or buffer gas supply system shall include a twin filter of coalescing type with 2 mabsolute filtration. One condensate drain trap per coalescing filter shall be provided whencondensate may be present at the coldest operating temperature.

2.8.4.7 (Addition)The separation gas supply system shall include a twin filter with 2 m absolute filtration.

2.8.4.8 (Addition)Operating conditions of the dry gas seals shall be monitored by individual leakage flow indicators onprimary leakage lines. The abnormal leakage due to any failure of the primary seals shall bedetected by differential pressure transmitters before and after a restriction orifice in the leakagepiping or by other equivalent system. Alarm and trip contacts of the differential pressure orequivalent system shall be provided.

2.8.4.9 (Addition)Piping material for buffer gas system shall be stainless steel.

2.8.4.10 (Addition)Vendor shall clearly indicate in the proposal seals behavior in case of reverse rotation, specifying ifthey can work properly, if they can withstand reverse rotation without damage, if reverse rotationshall be avoided and/or if some limitations for reverse speed and time shall apply.

2.10 LUBRICATION AND SEALING SYSTEMS

2.10.4 (Addition)The vendor shall supply, with the certified drawings, a summary of the lubricants and hydraulic fluidrequirements for all systems and equipment components in its scope of supply. The type, physical

properties and required quantity of each fluid and grease shall be specified in sufficient detail topermit proper selection and procurement.

2.10.5 (Addition)Nozzle size of pressure vessels including heat exchangers shall be 3/4 inch as minimum.

2.10.6 (Addition)Heat exchanger shall be designed to 110% of the normal duty as minimum.

2.10.7 (Addition)Lube oil piping shall be of 304 stainless steel, and prefabricated, shop-pickled and completely sealedfor shipment.

3. ACCESSORIES

3.1 DRIVERS

3.1.8 (Substitution)Speed increasers and reducers shall comply with API Std 613 edition 5. and shall be sized for themaximum power and speed of the driver under all specified operating and ambient conditions.

3.1.9 (Additions)Electric motors shall be designed, fabricated, inspected, and tested in accordance with theapplicable specifications.

3.2 COUPLING AND GUARDS

3.2.2 (Modification)Couplings shall be of the flexible element (laminated disc or diaphragm) type, supplied bymanufacturers approved by Contractor /Purchaser.

01


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Unless otherwise specified coupling hubs shall be removable and non-keyed type (tapered bore,hydraulically fitted).Flexible elements shall be stainless steel made.

3.2.7 (Modification)Coupling guards shall be supplied for all rotating parts. Guards shall be fully enclosed and of thespark-proof type. They shall be provided with a 2 inch minimum vent connection fitted with vendorsstandard breather, and a 2 inch minimum drain connection fitted with a steel pipe plug.

Guards shall be substantially constructed and be sufficiently rigid to withstand deflection anddistortion and prevent rubbing as a result of bodily contact.

3.3 MOUNTING PLATES

3.3.1 General

3.3.1.1 (Modification)If not otherwise specified equipment shall be furnished with a baseplate.

3.3.1.2.6 (Substitution)Anchor bolts, nuts and washers shall be designed by vendor.

3.3.1.2.10(Modification)Baseplate shall be furnished with:

Leveling jackscrews and associated leveling plates adjacent to each anchor bolt pocket.

Spot subplates, shim packs and capscrews adjacent to each anchor bolt.

3.3.2 Baseplates

3.3.2.1 (Modification)Unless otherwise specified, the complete compressor unit, including gear and driver, shall bemounted on a single baseplate. Baseplate shall be extended (length and width) for the compressorand all accessories without overhang, except that motor driver conduit boxes, and removable oildrain header piping may extend beyond the base plate. If the use of multiple section baseplates areinevitable due to size, transportation, installation (lifting constraints), and/or plant lay-outconsideration multiple-section baseplates shall have machined and doweled mating surfaces, toensure accurate field assembly.

3.3.2.4 (Modification)Delete from this clause the words When specified.

3.3.2.4.1(Modification)Delete from this clause the words When specified.

3.3.2.6 (Modification)Delete from this clause the words When specified.

3.3.2.6.1 (Modification)Levelling pads or targets shall be provided.

3.3.2.10(Modification)Delete from this clause the words When specified.

3.3.2.12 (Addition)

The baseplate shall be furnished with two earthing lugs situated diagonally opposite each other ateither end of unit.


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3.3.2.13 (New)Auxiliary piping to compressor supplied by the Manufacturer shall allow removal of the entiremachines or machine heads.

3.3.2.14 (New)The baseplate design and layout shall consider safety, operator and maintenance efficiencies, andcost effectiveness. Piping, conduit and other auxiliary equipment shall be routed to eliminatetripping hazards. Piping and conduit shall be routed downward from the compressor and driver intotroughs below the deck level and through the side of the baseplate. Grating or decking shall coverthese troughs.

3.4 CONTROL AND INSTRUMENTATION

3.4.1.1 (Modification)For instrumentation and control system refer to the General Specification for instruments suppliedwith packages.

3.4.1.6 (Addition)All instruments/systems shall be repairable by replacing defective parts.

3.4.1.7 (Addition)Highly descriptive trouble shooting instructions, covered in vendor standard maintenance manualsincluding sufficient information and data, shall be furnished to help easy fault location and isolation.

3.4.2 Control System

3.4.2.1 (Modification)If not otherwise specified, a complete and independent Unit Control Panel (UCP) shall be supplied

by the vendor. As far as applicable it shall include also the following systems:

Anti-surge system

Steam turbine governor system

Overspeed shutdown system

Vibration and temperature monitoring system

3.4.2.2 (Substitution)An antisurge system shall be provided by the vendor. The unit surge controller shall be fullyprogrammable to implement standard and custom algorithm/surge line models.

Anti surge system for each compressor shall be comprised as a minimum of:

Performance monitoring Anti-surge control

Anstisurge control valves (at field)

Flowmeters, pressure transmitter and temperature transmitter (at field)

3.4.2.3 (Addition)Electronic instruments equipping the package shall be smart type with HART protocol. Selectedimportant information such as facility fault alarms and shutdown alarms shall be repeated to DCSthrough redundant serial interface (MODBUS RS-485).

Dedicated controllers i.e, anti-surge controllers shall be also interfaced to DCS through direct serialinterface (MODBUS RS-485) or via Unit Control Panel.

3.4.2.4 (Addition)For vibration, axial displacement and bearings temperature monitoring system, the system shallinclude a dedicated card for connection to expert prediction monitoring system.


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3.4.6 Electri cal Systems

3.4.6.1 (Modification)For electrical scope of work refer to the applicable specifications.

3.5 PIPING AND APPURTENANCES

3.5.1.1 (Modification)When buffer gas is specified as being required, compressor supplier shall furnish all requiredcontrols, indicating and protective instrumentation and interconnecting piping for the system. Thesystem shall be designed to accept the fluid at the supply conditions specified. As minimum,compressor supplier shall furnish a pre-piped harness per API 617. If the system is off-mounted fromthe compressor, it shall be furnished as a fully assembled skid-mounted module.

3.5.1.5 (Addition)Piping and equipment shall be designed and arranged for easy disassembling and maintenance.Cooling water supply and return line connection shall be flanged at the edge of baseplate. Isolationvalves for cooling water supply and return lines will be provided by the vendor.

3.5.1.6 (Addition)Vendor shall provide for by-passing the bearings together with couplings, if applicable, duringshop and field prestart-up oil flushing operations, without dismantling housings and guard. Theexternal feed/drain lines on the housing(s) shall be designed with a blinded tee next to the housing(or a short removable flanged section) so that a temporary by-pass can be easily installed to thedrain line(s) and the housing blinded. The temporary by-pass lines and housing blinds shall beincluded in the Special Tools provided by the vendor.

3.5.1.7 (Addition)

In general connections, piping, valves and fittings of 1 , 2 , 3 , 5, 7, 9, 22 and 26 shall notbe used. In case their use is unavoidable, vendor shall provide reducer with bigger size other thanlisted above at Purchasers battery limit connection.Pipe sizes smaller than 1/2 shall not be used except for instrumentation and analysis.

3.5.3 Process Piping (Modification)

Process piping is not generally part of the scope of supply. If process piping is part of the scope ofsupply, Process piping shall be in accordance with the applicable piping material specification.

3.6 SPECIAL TOOLS

3.6.1 (Modification)Vendor shall quote any special tools required for installation and/or maintenance of the compressor

including the facilities for the flushing of the lube oil piping. For vertical split units, vendor shall quote,a cradle or similar device for compressor rotor and diaphragms removal.

4. INSPECTION, TESTING, AND PREPARATION FOR SHIPMENT

4.1 GENERAL

4.1.4 (Substitution)Compressor Data Sheet and/or Scope of inspection, which are attached to the Material Requisition,shall be referred for the inspection items that will be witnessed or be observed by Purchaser and theitems which shall be reported to Purchaser. When the third party inspectors are involved, it will beinformed to Vendor.

4.1.7 (Modification)The vendor shall provide a quality control plan listing the program of inspection and testing, forContractor /Purchaser review and agreement.


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4.1.8. (Addition)The vendor shall submit to Purchaser the following records for each compressor:

(1) Material mill test certificates and heat treatment records(2) Non-destructive examination(3) Dimensional inspection(4) Impeller overspeed test (including subsequent inspection)(5) Dynamic balancing test (including gear units, if any)(6) Hydrostatic test(7) Mechanical running test(8) Shaft seal test(9) Gas leak test(10) Test of gear units, if any(11) Control device function test, when applicable(12) Calibration certificate for instrumentation(13) Dry gas seal test, when applicable(14) Lube oil system

- Leak test for lube oil tank- Hydrostatic test for cooler and filter- System leak test- System function test- System cleanliness- Calibration certificate for instrumentation

(15) Other inspection and test (when specified)

4.2 INSPECTION

4.2.1.a (Modification)Material mill test certificates shall be checked for the following parts. The certificate shall give thechemical compositions, mechanical properties, heat treatment, etc., and they shall meet therequirements of the specified material specifications.

(1) Compressors casings (including heads, suction and discharge nozzles and flanges)shafts, shaft sleeves, impellers and casing bolts & nuts

(2) Pinions and gears of gear units

(3) Seal oil drain traps and seal oil overhead tanks.

4.2.1.2.b (Modification)The applicable non-destructive examination shall be clarified by vendor, taking account of thePurchasers basic requirements as shown in Annex 1F.

4.2.1.5 (Modification)Hardness of parts, welds, and heat-affected zones shall be verified for H2S service.

4.2.1.6. (Addition)Measurement of the major dimensions shall be taken and they shall be checked with the certifiedoutline drawings (approved by Contractor/Purchaser). The major dimensions refer to the followingitems:

length, width and height of baseplates

position and size of foundation bolts major nozzles size and position, rotational direction

position of coupling flange-end and height of shaft center

nameplates.


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The result shall be noted on the inspection certificate with the drawing no. and revision no. of thecertified outline drawings, but detailed dimensional records are not required.

4.2.1.7 (Addition)All the running clearances shall be inspected and be recorded.

4.2.1.8 (Addition)Each pressure-retaining casting shall be subjected to visual inspection for all surfaces, and shall befree from adhering sand, scale, cracks, hot tears or other similar casting defects in accordance withthe related specification.

4.2.1.9 (Addition)Machined surfaces of nozzle flanges shall be visually inspected to confirm no harmful defects.

4.2.2.6 (Addition)Material certificatesThe Manufacturer shall furnish material certificates in accordance with BS EN 10204 (2004), of thetype as specified in the table below:

CERTIFICATION OF MATERIALS BY COMPRESSOR PART

COMPONENT Certificate TypeBSEN 10204

Pressure containing parts (casing, end head andmain process nozzles)

3.1 (see note 1)

Shaft/ Impellers 3.1 (see note 1)

Shear rings 3.1

Internals - inner barrel, diaphragms, guidechannels, labyrinths, shaft sleeves, shaft seals

3.1

Bolting 3.1

All other process and auxiliary piping, flanges

and connections3.1

NOTE 1: Positive material identification (PMI) shall be applied at the time of assembly topressure containing parts, rotor shafts and impellers that are made of low-alloy steel, high-alloy martensitic steel, ferritic or austenitic stainless steel, or nickel alloys. This shall beused to positively identify that the materials have the specified alloy composition. Themethod and procedures are subject to approval by the Purchaser.

4.3 TESTING

4.3.2.1 (Addition)Hydrostatic test shall be performed only after final machining of the subject component.

4.3.3 Overspeed test

4.3.3.1 Impeller Overspeed Test (Modification)Each impeller shall be subjected to an overspeed test at not less than 115 percent of maximumcontinuous speed for a minimum duration of 3 minutes.

4.3.6 Mechanical Running Test

4.3.6.1.5 (Substitution)During the mechanical running test, the lubricating oil and seal oil temperatures shall be held for aminimum period of 30 min at the temperature corresponding to the minimum allowable viscosity, andfor 30 min at the temperature corresponding to the maximum allowable viscosity. Variable speedcompressors shall be checked for correct rotor dynamic behavior through their full speed rangeduring this temperature variation. Oil pressures and temperatures and bearing temperatures shall be

measured throughout the test.

4.3.6.1.6 (Addition)


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The contract shaft seals and bearings shall be used for the compressor mechanical running test. Jobcouplings, Job gear unit, job dry gas seal unit and job lube oil unit shall be used for MechanicalRunning Test with job Rotor.

4.3.6.1.7 (Addition)All warning, protective, and control devices specified for use during the test shall be checked,calibrated, and adjustments shall be made as required.

4.3.6.2.1 (Substitution)All bearings shall be removed, inspected, and reassembled after the mechanical running test hasbeen successfully completed.

4.3.6.2.2(Modification)Mechanical contact type or dry gas seals shall not be removed after a successful running test.

4.3.8.5 (Modification)Post-test inspection of compressor internals shall be carried out only after completion of first rotorsmechanical running test, if spare rotor is purchased. In this case, the gas test shall be performedonly after completion of 2 (second) rotors mechanical running test. So , test sequence will be asfollows:

1) Performance Test with Spare Rotor2) Mechanical Running Test with Spare Rotor3) Mechanical Running Test with job Rotor.

4.4 PREPARATION FOR SHIPMENT

4.4.3 (Modification)Prior to shipment, a final inspection shall be made by Purchasers representative to ensure that all

instruments, tags, etc., are as specified. All items requiring this inspection are to be collected in acentral area.

4.4.3.1 (Substitution)Exterior surfaces, except for machined surfaces, shall be coated with primer paint and finishing paintin accordance with the applicable painting specification. The paint shall not contain lead orchromates.

Painting of exterior stainless steel surfaces, if required, will follow the applicable paintingspecification.

4.4.3.9 (Addition)Separately shipped parts and spare parts shall be prepared and packaged per Manufacturer

standard preparation methods. Identification tags shall be attached to each part as well as to theoutside of each box. Spare parts shall be crated separately from parts needed for initial installation.

4.4.3.10(Substitution)Unless otherwise specified, each individual spare rotor shall be crated in a metal container fortransportation and storage. These containers shall be equipped with facilities for low pressurenitrogen blanketing. The identification attached to spare rotor containers shall include Manufacturerserial number, the Purchaser's equipment tag number, and the weight of the container, including therotor. Crating, containers and storage shall be suitable for 12 years outdoor storage in the verticalposition.

4.4.3.12(Addition)Exposed shaft ends shall be protected against physical damage.

4.4.4 (Modification)All connections, except suction and discharge flanges, shall be identified by metal tags attached bystainless steel wire or stenciled imprints stamped on each connection.


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4.4.7 (Addition)Export packing and shipping shall conform to Purchasers shipping procedure.

ANNEX 1FApplication Table for Non-Destructive Examination

RT: Radiographic inspection PT: Liquid penetrant inspection

MT: Magnetic particle inspection UT: Ultrasonic inspection

Item Applicable Parts RT MT or PT UT

1 Pressure Casings:

1a Raw Material MT or PT(1) (3)

UT(1)

1b Butt-Weld/ Full Penetration Weld Joints 100% RT 100% PT (*)

1c Other Type of Weld Joints RT 100% MT or PT

1d Machined Surface 100% MT or PT(2) (3)

2 Repair of Cast Casing

2a Defects removed surface(4)

MT or PT

2b Repair welded surface of major defects(4)

RT PT (*)

2c Repair welded surface of other defects(4)

MT or PT

3 Diaphragms MT or PT(2)

4 Impellers MT after the over-speed test for

accessible area of weldsUT

(1)

5 Shafts MT(2)

UT(1)

6 Balance Drums MT(2)

UT(1)

7 Shaft Sleeves MT or PT(2)

8Butt weld join ts / Full penetration weld joints

On process gas auxiliary piping5% RT 100% of PT

9 Gear

9a Rotating parts MT or UT(5)

UT(1)

9b Gear and pinion teeth MT

10 But t weld join ts/ Full penetrant weld join ts 100% RT 100% of PT (*)

11 Machined sur face 100% MT or PT (2)(3)

Notes:(1) Applicable for the raw materials as per raw material suppliers standard procedure.(2) Applicable after the final machining (machined surface).(3) Applicable after the stress relief (when applicable)(4) Non-destructive examination is applicable only for defects and repaired area(5) For welded joints(*) UT in case RT is not practicable.


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CHAPTER 2

CENTRIFUGAL AND AXIAL COMPRESSORS

2. BASIC DESIGN

2.1 GENERAL

2.1.1.1 (Substitution)The sectional head-capacity characteristic curve shall rise continuously from the rated point topredicted surge. This rise shall be sufficient to result in an increase of the pressure ratio of at least 5%when operating at specified suction conditions. If guide vanes are provided, this requirement shall bemet for each setting of adjustable inlet guide vanes or axial stator vanes.

The gradient of the tangent of the compressor head capacity curve shall decrease continuously,never increase, and never become zero from stonewall capacity up to the surge point.

The stonewall capacity is defined as the capacity where the decrease in polytropic head is 10% foran increase of 1% in inlet volume capacity. The stonewall capacity shall be at least 110% of the ratedcapacity at rated speed. The compressor Manufacturer shall confirm the suitability of the compressorto operate continuously at the stonewall point and any limitation on operating beyond the stonewallpoint.

For the purpose of operational flexibility:

The end-of-curve (EOC) capacity is defined as the capacity at rated speed wherethe polytropic head is 85% of the polytropic head at rated capacity. If applicable, theEOC capacity shall be stated in the data/requisition sheets.

The turn-down (TD) capacity is defined as the capacity at the control point for thesurge at rated speed. The predicted surge capacity at rated speed shall be stated inthe data/requisition sheets.

For identical compressors operating in parallel (if so stated in the data/requisitionsheets), the respective heads at the same flow shall not differ by more than 2% fromeach other at any point on the curves.

The operating stability range of the compressor shall be at least 25% of the ratedpoint flow.

The Vendor shall guarantee the followings compressor performances.

Capacity shall have zero negative tolerance at the normal operating point

(certified point). This tolerance shall be inclusive of all test tolerances.

Head shall be within the range of 100%-105% of the normal operating point(certified point). This tolerance shall be inclusive of all test tolerances.

Horsepower based on measure head at normal operating point (certifiedpoint) shall not exceed 104% of the value at the specified normal operatingpoint (certified point). If the power required at this point exceeds 104%,excess head may be removed by trimming an impeller at the Purchasersoption.

2.1.2 (New)


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Impeller flow coefficients shall be within the 0.01 to 0.12 range. Impeller designs with flowcoefficients outside the above limits need adequate references and are normally only acceptable ifadequate model testing has been done. The final acceptance of these deviations shall be subject tothe Contractor /Purchaser's approval.

Flow coefficient: = Q1/ (/4 D U)

Where Q1= inlet volume flow m/sU = impeller tip speed m/sD = impeller diameter m

2.1.3 (New)Impeller stage head coefficients shall be within the 0.4 to 0.55 range Impeller designs with headcoefficients outside the above limits need adequate references and are normally only acceptable ifadequate model testing has been done. The final acceptance of these deviations shall be subject tothe Contractor /Purchaser's approval.

Head coefficient: = Hp/ (U / 2)

Where Hp= impeller stage polytropic head kJ/kgU = impeller tip speed m/s

2.1.4 (New)Shaft length-to-diameter ratio L/D shall not exceed a factor of 10. Larger L/D ratios may beacceptable only if they are provided with adequate references and an initial stability analysis in theManufacturer's proposal, which proves the log decrement to be in the stable region.

Where: L = compressor bearing span in m (ft)D = average shaft diameter under the impellers m (ft).

2.1.5 (New)Average impeller inlet Mach numbers shall be within the normal 0.85 limit. On a case-by case basis,subject to the Contractor/Purchaser's approval, higher numbers may be acceptable if computationalfluid dynamics (CFD) results indicate that localized stalling at the impeller eye rim is minimal, and isnot affected by the specified temperature and pressure variations in the impeller inlet. Transonicconditions shall not be accepted.

2.1.6 (New)Machine Mach numbers or impeller tip Mach numbers shall normally be within the 1.2 limit. HigherMachine Mach numbers will be accepted if the Manufacturer provides adequate references andcorresponding CFD results for these designs.

2.3 CASING

2.3.1 Pressure Containing Casings

2.3.1.1 Pressure containing casings shall not be de-rated from their design MAWP and the appliedhydrostatic test pressure shall be selected accordingly.

2.3.1.2 (Modification)Casing designed for more than one maximum allowable pressure level (Split-pressure-level casing)are not acceptable

2.3.1.5 (Modification)O-rings or ring grooves machined into the flange facing of an axially split casing joints are not

acceptable.

2.3.2 Pressure Casing Connections


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2.3.2.2.2(New)The Manufacturer shall state in its proposal the actual and the maximum recommended gasvelocities in each nozzle.

2.3.2.3 Auxiliary Connections

2.3.2.3.1(Substitution)All casing openings for pipe connections shall be not smaller than NPS (DN 20) and shall bewelded to the casing and flanged or, alternatively, machined and studded. All welded connectionsshall be full penetration butt welded. Openings smaller than NPS 1 (DN 25) may be self-reinforcedbranch fittings of the weldolet type.

2.3.2.3.2(Substitution)Auxiliary connections shall not be threaded.

2.3.4.1 (Substitution)The compressor shall be designed to withstand external forces and moments on each nozzlecalculated per Equations 2.E-1a or 2.E-1b and 2.E-2 of Annex 2E. For each main process nozzle,the Manufacturer shall furnish in tabular format the following data:

The maximum allowable forces and moments and combinations thereof for continuousoperation including any transient conditions such as start-up and (emergency) shut-down

Expected nozzle movements due to thermal expansion between the cold static and normalfull load operating conditions

Any expected movement in addition to the above as a result of transient conditions.

2.4 GUIDE VANES, STATORS, AND STATIONARY INTERNALS

2.4.5 (Substitute)The vendor shall confirm that the furnished diaphragms are suitable for the maximum potentialdifferential pressure during any specified operating condition, as well as coast-down, shutdown,momentary surge, or settling out pressure.

2.4.11 (Addition)When the compressor is provided with diffuser vanes after impeller exit, it shall be free from anyabnormal acoustic noise and vibration. Vendor shall verify the acceptable acoustic noise/vibrationshop tests. No diffuser vanes are permitted for single stage compressors and at the exit of the laststage impeller of every compression section, i.e., just before discharge piping, for multistagecompressors.

Description of proposed vaned diffusers, if applicable (i.e. location within the compressor, number ofvanes, passing frequencies) shall be submitted by vendor.

2.5.3.1 (Substitution)Centrifugal compressor shafts shall be made only of a single piece of forged and heat-treated steel.The shaft shall be forged as close as possible to the final dimensions and then suitably machined.Shafts shall not be made from hot rolled bar stock, but vacuum remelted bar may be considered onan individual basis subject to approval of the Purchaser.

2.5.4.3 (Substitution)Flow in the balance piston line(s) shall be measured. During the factory test, balance piston flowshall be monitored and recorded.

2.7 BEARINGS AND BEARINGS HOUSING2.7.1 General

2.7.1.3 (Addition)


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Bearing metal temperature, as measured by the embedded RTD's, shall not exceed 110 C underthe worst combination of load conditions and at maximum specified oil inlet temperature. Themaximum allowable temperature of the bearing metal temperature measured by RTD on the teststand shall be 105 C.

2.7.1.4 (Addition)Water jacket cooling shall not be used.

2.7.1.5 (Addition)When the maximum operating bearing load exceeds 200 N/cm

2, it shall be subject to

Contractor/Purchaser's approval. Vendor shall submit to Contractor/Purchaser the design figureswith his standard criteria in this regard.

2.7.1.6 (Addition)Radial and thrust bearings shall be suitable for withstanding reverse rotation without damage.

2.7.2.1 (Addition)The bearing design shall ensure that they can only be installed correctly. Inboard and outboardbearings on one compressor body shall be identical, unless the vendor can provide details todemonstrate that this compromises the bearing design. The bearings shall be permanently markedas to their locations.

2.7.2.4 (Addition)The minimum turning speed has to be identified to avoid dry friction. The method of measuring thebearing clearances shall be clearly identified in the maintenance manuals. If required cylindricalgauges shall be delivered together with the compressor.

2.7.4.1 (Addition)In case a mist fan is not applied to the oil system the bearing housing shall be permanently sealed

by a dry inert gas or air flow and needs design approval by Contractor/Purchaser. If a coupling hub issuited within the bearing housing the casing has to be equipped with sufficient breathing devices toenable heat transfer of air.

2.7.4.2 (Addition)Bearing housings, including bearing support members and oil retaining parts, shall be steel.

2.10.2 (Addition)Selection of the same oil type and viscosity grade for the complete machine train should beconsidered.

3. ACCESSORIES

3.2.1 (New)The coupling shall be designed so that the full rated torque of the coupling, including a total servicefactor of 1.75, is transmitted by friction only and not by the coupling bolts shear load.

3.4.5 (Addition)The Manufacturer shall supply a list of alarms and/or shutdowns for the entire compressor train. Therecommended setpoints for all these alarms and/or shutdowns shall be included. The list shallinclude, but not be limited to:

Radial bearing vibrations

Radial and axial bearing temperatures

Axial displacement of the rotor(s)

Lube and control oil system parameters

Oil seal or dry gas seal systems Operational process gas conditions limitations


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3.4.7 Vibration, Position, and Bearing Temperature Detectors

3.4.7.2 (Modification)Vibration and axial-position monitors shall be supplied and calibrated in accordance with API 670 ,edition 4.

3.4.7.4 (Modification)Bearing temperature monitors shall be supplied and calibrated in accordance with API 670, edition 4.

3.4.7.7 (New)All wire entries into the compressor casings or bearing housings shall be fully sealed against leakageinto the environment and wiring conduits.


4.3.3 Optional Tests

4.3.3.1 Performance test

4.3.3.1.1 (Modification)

Compressors Performance Test is required as per ASME PTC-10 1997 , and shall remain havingthe responsibility for combined performance of compressors and its drivers after installationat the site.This test shall be carried out at the Suppliers workshop works prior to the delivery. This test shallsimulate the individual operating cases as defined on the data sheets including normal and ratedpoints. Purchaser could witness the above tests for five operating points (@ normal speed) includingsurge and overload.

Compressor Manufacturer is responsible for combined performance test of compressor and its driverafter installation of the compressor at site.

The performance test shall also adequately demonstrate the compliance of the aerodynamicperformance with the requirements of (2.1.1.1).

For variable speed compressors, the surge line shall be established between minimum governor andmaximum continuous speeds by means of additional points.

4.3.3.1.3(Addition)The speed required to achieve the specified performance and related tolerances shall be within 5%of the originally stated 100% speed.

4.3.3.1.7(New)The contract seals shall be used during the performance test.

4.3.3.1.8(New)During performance testing the original internal clearances and tolerances shall be maintained.Increasing the clearances of the balance drum and/or other close clearance points with asubsequent performance correction is not permitted.

4.3.3.1.9(New)In the performance test procedure, the Manufacturer shall quantify all flows and correction factors forinterstage losses, balance losses, and other such losses to be considered. The performanceprocedure including these calculations shall be subject to the Contractor/Purchaser's approvalbefore the actual performance test.

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CHAPTER 3

INTEGRALLY GEARED COMPRESSORS

2. BASIC DESIGN

2.1 GENERAL

2.1.1.1 (Substitution)The sectional head-capacity characteristic curve shall rise continuously from the rated point topredicted surge. This rise shall be sufficient to result in an increase of the pressure ratio of at least5% when operating at specified suction conditions. If guide vanes are provided, this requirementshall be met for each setting of adjustable inlet guide vanes or axial stator vanes.

The gradient of the tangent of the compressor head capacity curve shall decrease continuously,never increase, and never become zero from stonewall capacity up to the surge point.

The stonewall capacity is defined as the capacity where the decrease in polytropic head is 10% foran increase of 1% in inlet volume capacity. The stonewall capacity shall be at least 110% of therated capacity at rated speed. The compressor Manufacturer shall confirm the suitability of thecompressor to operate continuously at the stonewall point and any limitation on operating beyondthe stonewall point.

For the purpose of operational flexibility:

The end-of-curve (EOC) capacity is defined as the capacity at rated speed where thepolytropic head is 85% of the polytropic head at rated capacity. If applicable, the EOCcapacity shall be stated in the data/requisition sheets

The turn-down (TD) capacity is defined as the capacity at the control point for the surge at

rated speed. The predicted surge capacity at rated speed shall be stated in thedata/requisition sheets

For identical compressors operating in parallel (if so stated in the data/requisition sheets),the respective heads at the same flow shall not differ by more than 2% from each other atany point on the curves

The operating stability range of the compressor shall be at least 25% of the rated pointflow.

The Vendor shall guarantee the followings compressor performances.

Capacity shall have zero negative tolerance at the normal operating point (certified point).This tolerance shall be inclusive of all test tolerances.

Head shall be within the range of 100%-105% of the normal operating point (certifiedpoint). This tolerance shall be inclusive of all test tolerances.

Horsepower based on measure head at normal operating point (certified point) shall notexceed 104% of the value at the specified normal operating point (certified point). If thepower required at this point exceeds 104%, excess head may be removed by trimming animpeller at the Purchasers option.

2.7 BEARINGS AND BEARINGS HOUSING

2.7.1 General

2.7.1.3.1 (Addition)Bearing metal temperature, as measured by the embedded RTD's, shall not exceed 110 C underthe worst combination of load conditions and at maximum specified oil inlet temperature. Themaximum allowable temperature of the bearing metal temperature measured by RTD on the teststand shall be 105 C.


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3. ACCESSORIES

3.1 (ADDITION)Integrally geared compressors shall not be driven through the pinion shaft.

3.4.5 (Addition)The Manufacturer shall supply a list of alarms and/or shutdowns for the entire compressor train. Therecommended set-points for all these alarms and/or shutdowns shall be included. The list shallinclude, but not be limited to:

Radial bearing vibrations

Radial and axial bearing temperatures

Axial displacement of the rotor(s)

Lube and control oil system parameters

3.4.7 Vibration, Position, and Bearing Temperature Detectors

3.4.7.2 (Modification)

Vibration and axial-position monitors shall be supplied and calibrated in accordance with API 670edition 4.

3.4.7.3 (Modification)Bearing temperature monitors shall be supplied and calibrated in accordance with API 670 edition 4.

3.4.7.5 (Modification)Gearbox vibration monitors shall be supplied, installed and calibrated in accordance with API 670edition 4.

3.4.7.8 (New)All wire entries into the compressor casings or bearing housings shall be fully sealed against leakageinto the environment and wiring conduits.


4.3.3 Optional Tests

4.3.3.1 Performance test

4.3.3.1.1 (Modification)

Compressors Performance Test is required as per ASME PTC-10 1997 , and shall remain having

the responsibility for combined performance of compressors and its drivers after installationat the site.This test shall be carried out at the Suppliers workshop works prior to the delivery. This test shallsimulate the individual operating cases as defined on the data sheets including normal and ratedpoints.

Purchaser could witness the above tests for five operating points (@ normal speed) including surgeand overload.

Compressor Manufacturer is responsible for combined performance test of compressor and its driverafter installation of the compressor at site.

The performance test shall also adequately demonstrate the compliance of the aerodynamic

performance with the requirements of (2.1.1.1).

For variable speed compressors, the surge line shall be established between minimum governor andmaximum continuous speeds by means of additional points

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Spec for comp

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