014-MS For Bolt Tightening (Piping& Equipments).pdf

Pearl GTL Project

LINDE ENGINEERING

Shell Project No: HP-3000-QAT Contractor Project No: 5887

Project Document Number: T- 4.250.955 Project Rev.: A Page 2 of 21

Purchase Order Number:

2MH127

Tag/Item Number(s): N/A

Unit(s): ASU

PCWBS: Z

QATAR SHELL GTL PROJECT (PEARL) C2 AIR SEPARATION UNITS CONSTRUCTION

E A 30.06.08 Ready for Constructions BS EO AG RFC

D A 19.06.08 Ready for Constructions FB EO AG RFC

C O 15.04. 08 Issued for Company comments BR UA ZG ICC

B 08.04.08 Issued for Review BR UA ZG IFR

A 06.04.08 Issued for Internal Review BR UA ZG IIR

GAMA Rev.

Project Rev

Date Description Prepared

By Checked

By

Approved By

Status

No. No. ORIGINATOR

LINDE ENGINEERING AG

Document Title:

METHOD STATEMENT FOR BOLT TIGHTENING (PIPING & EQUIPMENTS)

Contractor

Gama Qatar Co. W. L. L.

Document No. LOC470

GAM MTS MEC GTL 014 E

Org.

Code

Doc.

Type

Disc. Code

Geogr. Area

Seq.

No

Rev. No

Vendor Code

Project Document Number: T- 4.250.955 Rev No: A

Doc. Title : GAM-MTS-MEC-GTL-014 METHOD STATEMENT FOR BOLT TIGHTENING (PIPING & EQUIPMENTS)

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TABLE OF CONTENTS

1. PURPOSE _____________________________________________________________________ 5

2. SCOPE ________________________________________________________________________ 5

3. HSSE _________________________________________________________________________ 5

4. REFERENCES _________________________________________________________________ 5

5. DEFINITIONS _________________________________________________________________ 6

6. EQUIPMENTS _________________________________________________________________ 6

7. MANPOWER ___________________________________________________________________ 6

8. RESPONSIBILITY ______________________________________________________________ 7

8.1. SITE MANAGER __________________________________________________________________7

8.2. CONSTRUCTION MANAGER ______________________________________________________7

8.3. EQUIPMENT MANAGER __________________________________________________________7

8.4. SITE ENGINEER __________________________________________________________________7

8.5. SITE SUPERVISOR _______________________________________________________________7

8.6. CREW LEADER/FOREMAN _______________________________________________________7

8.7. STEEL ERECTOR_________________________________________________________________7

8.8. QC ENGINEER ___________________________________________________________________7

8.9. QC INSPECTOR __________________________________________________________________7

8.10. HSSE MANAGER _______________________________________________________________8

8.11. HSSE OFFICER _________________________________________________________________8

8.12. BOLT TIGHTENER_____________________________________________________________8

9. PROJECT REQUIREMENTS _____________________________________________________ 8

9.1. MATERIAL: ______________________________________________________________________8

10. PROCEDURE ________________________________________________________________ 8

10.1. PRE ASSEMBLY INSPECTION ___________________________________________________8

10.2. TORQUE WRENCHES __________________________________________________________9

10.3. PIPE ERECTION _______________________________________________________________9

11. JOINT TIGHTENING PROCEDURE ____________________________________________ 10

12. METHOD OF TIGHTENING OF BOLTS ________________________________________ 10

13. TORQUE VALUES ___________________________________________________________ 12

14. DISASSEMBLY AND REASSEMBLY ___________________________________________ 12

15. SUMMARY OF BOLTING TORQUES ___________________________________________ 13

16. QUALITY ASSURANCE _______________________________________________________ 16

17. ATTACHMENTS _____________________________________________________________ 16

17.1. BOLT TIGHTENING INSPECTION REPORT ______________________________________16

17.2. FLANGE ALIGNMENT INSPECTION REPORT ____________________________________16

17.3. JSA ___________________________________________________________________________16


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1. PURPOSE

The purpose of this method statement is to clarify the tightening & torque of high, ordinary strength bolts and inspection works at the Qatar Shell GTL Pearl Project by GAMA Qatar located inside the Ras Laffan Industrial City in Qatar.

2. SCOPE

This method statement identifies the basic structure of the Tightening & torque of high, ordinary strength bolts works used for the successful completion of the Piping & Equipments works, by using the FSI Procedure stage by stages will be followed.

3. HSSE

All works shall be in compliance with the State of Qatar laws and regulations, Ras Laffan Industrial City and International standards, codes, LINDE ENGINEERING AG and QSGTL and/or its PMC requirements and instructions. In addition all employees and GAMA subcontractor employees on site will have thorough QSGTL site safety induction, LINDE ENGINEERING AG Site Safety Induction and GAMA Qatar Safety induction for site safety, health, environmental and security prior to work activities. Other training courses will be attended as required by LINDE ENGINEERING AG or QSGTL and/or its PMC as required. Risk Assessment will have been prepared by the Risk Assessment Team (RAT) ranking the hazards associated with project works and control measures to be taken to mitigate the hazards to an acceptable level. Each work scope or task will have a completed and approved Job Safety Analysis (JSA) identifying the potential hazards and control measures that will be implemented to protect people and environment. Supervisor as the basis of conducting his daily Total Safety Task Instructions (TSTI) and his weekly Tool Box Talk (TBT) will use the JSA. In addition to the above, employees conducting bolt tightening works will wear required PPE and highly visible vest where traffic or other hazards may exist. For additional safety requirements for a particular or specific task please refer to the JSA prepared for that task.

4. REFERENCES

T-4.234.542 : Project Quality Plan

T.13.377.360E : Flawless Startup Initiative (FSI)

T.13.377.453E : Specification For Flange Joint Integrity and Tightness

T.13.377.539G : Project specification PART III Contractor Services Chapter 9 - Flawless Start-up

T.13.377.578G : Project specification PART IV Procedures and Requirements Chapter 10 - Flawless Start-Up


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DEP 31.38.01.11 : Piping General Requirements (Amendments- T.13.376.815E)

T.4.096.689 : Flange Tightening

T-13.377.454 : Preservation of Old & New Equipment Standing Idle

T-4.250.930 : QA/QC Procedure for Cleanliness

T-4.250.906 : MS for Piping Cleanliness

5. DEFINITIONS

Company : QSGTL/or its PMC

Contractor : LINDE ENGINEERING AG Sub Contractor : GAMA QATAR Contract : QSGTL Pearl Plant - C2 ASU Project ITP : Inspection and Test Plan QCP : Quality Control Procedure QCE : Quality Control Engineer QCI : Quality Control Inspector QA/QC : Quality Assurance / Quality Control TPI : Third Party Inspection

6. EQUIPMENTS

Various Torque wrenches + Normal Spanners of all sizes

Feeler gage

Hammer

7. MANPOWER

Supervisor Engineer

QA/QC Engineer

Site Supervisor/Foreman

HSSE officer

Crew Leader

Steel Erector

Bolt Tightener.


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8. RESPONSIBILITY

8.1. SITE MANAGER

The site manager will provide inputs to the project execution plan to ensure that job strategies & philosophy are addressed.

8.2. CONSTRUCTION MANAGER

The construction manager is responsible for the overall management of the project construction team to ensure that safe and effective operations are conducted and properly documented.

8.3. EQUIPMENT MANAGER

The equipment manager will be responsible for the transporting equipments availability and good order.

8.4. SITE ENGINEER

Shall report to Construction Manager Shall be responsible for planning, execution and implementation of all site activities related to this procedure Shall train the Bolt Tightening persons & assign them a unique number with a similar manner to the welder numbers, Bolt tightener certificates shall be issued and certificates will bear this number.

8.5. SITE SUPERVISOR

Shall report to Site Engineer Shall be responsible for execution of construction activity Shall also prepare daily site construction records

8.6. CREW LEADER/FOREMAN

Shall supervise the group of erectors and lead them as per site requirements. Shall makes reports and keeps records of work accomplished and materials used. Shall perform related work and will be reporting to the Site supervisor.

8.7. STEEL ERECTOR

Shall erect steels structures as per site requirements and approved drawings in coordination with the Crew leader/Foreman.

8.8. QC ENGINEER

Shall report to Manager (QA/QC) and shall be responsible for overall implementation, monitoring and control of QC activities with releated to the Flawless start-up Initiative (FSI)

8.9. QC INSPECTOR

Shall report to QC Engineer Shall be responsible for attending all Inspection Stages as required by ITP &FSI Shall be responsible of performing all checks and shall prepare necessary Inspection Reports.


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8.10. HSSE MANAGER

Shall report to Project Manager and shall be responsible for over all control and Inspection of HSSE issues.

8.11. HSSE OFFICER

Shall report to HSSE Manager Shall be responsible for monitoring all safety aspects for this procedure.

8.12. BOLT TIGHTENER

All the bolt tightening persons are to be trained and certified. They should have Knowledge about FSI.

9. PROJECT REQUIREMENTS

This method statements deals with tightening of bolt for various type of bolts used in

Flanges of vessel

Piping and piping connection to rotary/static equipments

Flanges of Equipment

Piping & Flange connection

9.1. MATERIAL:

ASTM A 193 GRADE B7 ASTM A 193 GRADE B8 ASTM A 320 GRADE L7

10. PROCEDURE

10.1. PRE ASSEMBLY INSPECTION

Bolt holes of mating flanges shall be aligned using a spud wrench or similar tool. Lateral alignment shall be checked by ensuring that bolts and studs can be inserted without force and that the alignment tool is not required to impart a significant force to achieve alignment.

Two bolts shall be installed diametrically opposite each other, one bolt half way between the previously installed bolts, then the washer and nuts engaged

For flanges installed on horizontal lines, in order to retain the gasket the lower bolts should be installed first. (eg bolts 2, 3, 4 shown in Figure 1)

Parallelism of the flanges shall then be checked to confirm they are within the tolerances specified in Appendix 12 of DEP 31.38.01.11.


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The gaskets are then to be centred between the flanges. Nuts shall be hand tightened to hold the gasket in place. When flanged joints are in horizontal lines gaskets without centring devices such as ring joints, shall be lowered to the bolts for retention and then raised into position.

The remaining bolts and nuts shall be installed and hand tightened with the flange faces parallel. Care should be taken to assure proper seating and centring of the gasket within the allowable tolerances.

Bolts shall be tightened by wrench and inspected for tightness in accordance with Sec 11. Stud bolts should have an equal protrusion through the nuts on both sides of the flanges of between 1 and 3 threads.

10.2. TORQUE WRENCHES

Torque wrenches shall be calibrated as per calibration schedule and have a valid certificate that must be revalidated after the wrench has been inspected and recalibrated on a monthly basis. A validation sticker confirming inspection and last date of calibration shall be attached to the torque wrench at all times.

There are various types of tools available to achieve the proper torque value. The manufacturer's instructions shall be followed for the operation and maintenance of all Torque wrenches used to perform tightening procedure.

Hydraulic tensioning tools shall be supplied in accordance with DEP 31.38.01.11, Appendix 4

10.3. PIPE ERECTION

During erection of piping, each flange joint that will be disturbed during subsequent testing or commissioning activities shall be installed and checked by a qualified pipe fitter to confirm the following:

Flange face is clean and has been inspected to confirm there are no scratches, burrs, rust or any other defect on the gasket seating surface.

The alignment of the flange is in accordance with Appendix 12 of DEP 31.38.01.11 Piping- General Requirements and that the gasket is properly aligned with the flange seating surface.

Bolts are the correct length, diameter and material (including confirming color coding, if required), are undamaged, free of any burrs and are coated only with project approved lubricant

Bolts are installed in one direction with thread on one side. Stud grade punch to be visible.

The thread projection on each end of the stud bolt is between 1 and 3 threads and is uniform.


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Where applicable, any spectacle blind in the joint has been inspected to confirm that it is undamaged (no burrs or scratches on the gasket contact surface), and that the closed portion is coated with approved preservation material and a physical means of protection such as a timber cover.

Temporary gaskets have been installed correctly rated to meet the expected test pressures.

11. JOINT TIGHTENING PROCEDURE

The assembly drawings will indicate the bolt length, diameter and material type plus the gasket type and rating.

Flange faces shall be thoroughly cleaned using a SHELL or its PMC approved solvent to remove preservatives and the gasket surfaces shall be inspected for defects. Any rust or burrs shall be removed using a hand wire brush and/or a hand file. Particular attention shall be paid to seating surfaces for ring type joints. (Appendix 1 includes acceptance criteria for flange imperfections)

Bolts shall be checked for correct length, diameter and conformance with material specification. Except for those is oxygen service, all bolts will be coated with a SHELL or its PMC approved lubricant that shall be suitable for the expected temperatures and materials. NOTE: Once approved, a single lubricant type for each material (if necessary) shall be specified by LINDE for use by GAMA.

Gaskets shall be checked for size, rating, material specification and cleanliness. Remove any grease, burrs and rust from the gasket and trial fit it against the flange gasket seating surface.

Confirm the tightening method to be used to determine if it is to be tightened by: a) Purpose made hand wrench/spanner (bolts < diameter) b) Torque wrench (bolts diameter) c) Hydraulic tensioning tools (as specified in DEP 31.38.01.11) See also 14 below

Check the service to confirm the level of QC recording required.

12. METHOD OF TIGHTENING OF BOLTS

The following procedure shall be used for each successive step when wrench tightening bolts:

Two diametrically opposite bolts shall be tightened either simultaneously or in direct sequence. For flanges that do not require torque tightening, the bolts are to be tightened to a point where initial resistance is felt (nipped-up). Where torque tightening is specified then the bolts shall be tightened to the initial wrench torque value that applies 50% of the required bolt stress (See 13 below), either simultaneously in pairs by two tradesmen working in tandem or in direct sequence.


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Care shall be taken to prevent over-tightening one side of the flange and result in gasket crushing or flange distortion.

Uniform Gap between flanges to be maintained before tightening begins.

Thereafter, two diametrically opposite bolts located 90 further round the circumference shall be tightened, again being careful not to distort the flanges. This procedure shall be repeated until all bolts have been tightened once. This sequence of tightening pairs of bolts is to be applied irrespective of whether the tightening is by torque or hand wrench/spanner.

Once all the bolts in the flange have been initially tightened, the diametric tightening process shall be repeated starting at the first bolt pair. For flanges that are tightened with hand wrenches/spanners, the subsequent tightening should take them to a tightness where the bolts are uniformly tight and the gasket evenly compressed with the flange faces parallel.

For torque wrench tightening, the bolts shall be tightened in wrench torque value steps that tighten the bolts to 80% then 100% of the bolt stress. When performing the last two tightening sequences of all flange diameters, the pipe surface temperature is to be less that 40C. This is to minimize stress relaxation in the bolts due to the high temperature gradients.

As an example, the tightening sequence is shown in Figure-1 for a bolt flanges. Similar sequence shall be used for flanges having different numbers of bolts.

After the flanged connection has been tightened, the joint shall be inspected for uniform bolt loading by wrench testing each bolt in the same sequence specified above until all bolts are judged to have the same level of tightness.


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13. TORQUE VALUES

GAMA shall develop a table for each type of bolt specified for the project that indicates for every bolt size, the required torque value for each of the tightening steps. A typical torque table is shown below.

When completed the tables shall be reduced to pocket-size and issued to all pipe fitters, foremen and inspectors in a laminated format.

WRENCH TORQUE VALUES (Sample Table)

Bolt Size (mm)

TARGET TORQUE (N-m)

Initial Step (50% bolt stress)

Intermediate Step (80% bolt stress)

Final Step (100% bolt stress)

14. DISASSEMBLY AND REASSEMBLY

When disassembly of a joint is required, the bolts shall be loosened in the same sequence specified in Sec 12 for tightening. Each nut shall be loosened one-twelfth turn in the proper sequence, and the loosening sequence repeated at least once before any bolt is completely loosened. The retightening of bolts on reassembly shall follow the original procedure for tightening and inspection. In addition, the bolts, nuts, and bolt and nut bearing surfaces shall be re-lubricated as specified.

The retightening of bolts on reassembly shall follow the original procedure for tightening and inspection. In addition, the bolts, nuts, and bolt and nut bearing surfaces shall be re-lubricated as specified in Sec 11 above.

Gaskets shall be replaced, reuse is not permitted.


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15. SUMMARY OF BOLTING TORQUES

Table 1 B8M BOLTS (CLASS 1)

Lubrd Bolts( u = 0.1)

Dry Bolts (u = 0.2)

Bolt Size (Inch)

Diameter (mm)

Bolt Load (KN)

Torque (N-m)

Torque (ft-lb)

Torque (N-m)

Torque (ft-lb)

Bolt Stress (Mpa)

Yield (Mpa)

%Yield

12.7 12 35 25 44 32 166 205 81%

5/8 15.9 21 70 50 90 66 159 205 77%

19.1 32 125 90 164 121 159 205 77%

7/8 22.2 42 185 135 249 183 146 205 71%

1 25.4 58 280 205 381 281 146 205 71%

1-1/8 28.6 76 410 300 562 414 148 205 72%

1-1/4 31.8 98 580 425 800 590 151 205 74%

1-3/8 35.0 120 770 565 1069 789 149 205 73%

1-1/2 38.1 145 1005 740 1406 1037 150 205 73%

1-5/8 41.3 176 1300 960 1831 1351 152 205 74%

1-3/4 44.5 205 1630 1200 2296 1694 152 205 74%

1-7/8 47.6 241 2040 1500 2878 2123 154 205 75%

2 50.8 275 2470 1820 3501 2582 153 205 75%


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Table 2

B8 B8M Bolts (Class 2) B8T Bolts (Class 2)

Lubrd Bolts (u= 0.1)

Dry Bolts (u= 0.2)

Bolt Size (Inch)

Diameter (mm)

Bolt Load (KN)

Torque (N-m)

Torque (ft-lb)

Torque (N-m)

Torque (ft-lb)

Bolt Stress (Mpa)

Yield (Mpa)

%Yield

12.7 30 60 44 105 77 398 690 58%

5/8 15.9 54 130 96 233 172 412 550 75%

19.1 72 200 148 364 258 353 550 64%

7/8 22.2 110 350 258 644 475 379 550 69%

1 25.4 146 520 384 966 713 370 550 67%

1-1/8 28.6 162 640 472 1198 883 316 450 70%

1-1/4 31.8 199 860 634 1619 1194 306 450 68%

1-3/8 35.0 212 1000 738 1893 1396 264 345 77%

1-1/2 38.1 236 1200 885 2281 1682 244 345 71%

1-5/8 41.3 274 1500 1106 2861 2110 238 205 116%

1-3/4 44.5 316 1850 1364 3540 2611 234 205 114%

1-7/8 47.6 369 2300 1696 4413 3255 236 205 115%

2 50.8 423 2800 2065 5386 3972 236 205 115%

Bolt yield stress in this area is based on B8T Class 1 properties.


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Table 3

B7 & L7 Bolts

Lubrd Bolts (u = 0.1)

Dry Bolts (u= 0.2)

Bolt Size (Inch)

Diameter (mm)

Bolt Load (KN)

Torque (N-m)

Torque (ft-lb)

Torque (N-m)

Torque (ft-lb)

Bolt Stress (Mpa)

Yield (Mpa)

% Yield

12.7 39 80 59 140 103 530 720 74%

5/8 15.9 58 140 103 251 185 444 720 62%

19.1 107 300 221 546 403 529 720 73%

7/8 22.2 138 440 325 810 597 476 720 66%

1 25.4 177 630 465 1270 863 448 720 62%

1-1/8 28.6 218 860 634 1610 1187 424 720 59%

1-1/4 31.8 278 1200 885 2260 1667 427 720 59%

1-3/8 35.0 318 1500 1106 2839 2094 396 720 55%

1-1/2 38.1 374 1900 1401 3611 2663 386 720 54%

1-5/8 41.3 439 2400 1770 4578 3376 381 720 53%

1-3/4 44.5 513 3000 2213 5741 4234 380 720 53%

1-7/8 47.6 610 3800 2803 7292 5378 390 720 54%

2 50.8 726 4800 3540 9233 6810 404 720 56%

ASTM A/193/A183M does not address mechanical requirements for B8T Class 2, B8M Class 1 or B8 bolts greater then 1-1/2 dia.


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16. QUALITY ASSURANCE

The QA/QC management system for controlling the integrity of the joint shall be developed in detail during the activities, but shall include the following elements:

ALL joints shall be signed off by a qualified pipe fitter and checked by Inspectors.

Bolt torque tightening shall be applied to all bolts diameter. Recording of joint inspections and tightening will be kept for selected critical

Services (oxygen, hydrogen, severe cyclic conditions, cryogenic, vacuum, Very toxic substances, high temperature [>350C], high pressure),

A helium test to be carried out for super-critical services, i.e. critical and can cause harm to people or the plant, eg very toxic service.

A Quality Assurance System shall be operated conforming to related standards. Controls and checks shall be established and documented through relevant GAM-QCR-QAC-GTL-041.

17. ATTACHMENTS

17.1. BOLT TIGHTENING INSPECTION REPORT

17.2. FLANGE ALIGNMENT INSPECTION REPORT

17.3. JSA

C2 ASU PEARL GTL PROJECT RASLAFFAN INDUSTRIAL CITY

BOLT TIGHTENING INSPECTION REPORT

Subcontract Ref.: Report No.:

Item Description: Inspection Date: Item Location / Area: Test Code No.:

Subsystem: ITP No.:

Ref. DWG / Docs:

Used Measuring and test equipment ref. (if applicable):

INSPECTIONS Bolting Item No/Spool

No Mark No./Joint No

Grade Size Bolt Tightening (Torque Value)

Inspectors Signature

ORGANIZATIONS DATE NAME SIGNATURE

THIRD PARTY REP.

GAMA REP.

LINDE REP.

Acc

epte

d B

y

QSGTL OR its PMC REP.

GAM-QCR-QAC-GTL-041

C2 ASU PEARL GTL PROJECT RASLAFFAN INDUSTRIAL CITY

FLANGE ALIGNMENT INSPECTION REPORT

Subcontract Ref.: Report No.:

Item Description: Inspection Date: Item Location / Area: Test Code No.:

Subsystem: ITP No.:

Ref. DWG / Docs:

Used Measuring and test equipment ref. (if applicable):

INSPECTIONS Item No/Spool

No Mark No./Joint No Face Distance Face parallelism Centreline offset Inspectors

Signature

ORGANIZATIONS DATE NAME SIGNATURE

THIRD PARTY REP.

GAMA REP.

LINDE REP.

Acc

epte

d B

y

QSGTL OR its PMC REP.

GAM-QCR-QAC-GTL-058

JSA Number: T.4.250.955

Normal Approvals: Name Date

JSA by: Mr. Atila Gtn, 18.03.08

Job Supervisor: Muslim Topalogu 18.03.08

Name Date

Discipline Superindent (LINDE)

HSSE Representative (LINDE)

2.Permit To Work.

LINDE EMERGENCY TELEPHONE NO. HSSE MANAGER 506 41 20

PEARL HOT LINE: 474 88 88

JOB SAFETY ANALYSIS / RISK ASSESSMENT

Page No: 1 of 3

Job being analysed: METHOD STATEMENT FOR BOLT TIGHTENING (PIPING&EQUIPMENTS)

Additional Approvals (Determined by Job Supervisor in correlation with LINDE HSSE Manager).

Department/Section doing JSA:HSSE & Mechanical Works JSA Members:Mr. Syd Osborne, Mr. Ali E. TURKER

Job Performers:Mr. Ali E. TURKER

General job requirements / Common

Personnal Protective Equipment.

Signature

Note: 1) If any of the tasks involves biological, physical or chemical hazards, then The LINDE Industrial Hygienist must also approve the work.

2) Use additional sheets as necessary.

3) Details on safety (PPE,Hazard etc) and environmental requirements can be found in LINDE and SHELL Safety and Environment Procedures.

Approval required for hazardous work detailed in the LINDE work permit procedure.

Changing conditions and emergency procedures

Stop work. Switch of equipment.Supervisor directs personnel to nearest and safest muster point considering wind direction. Supervisor counts all employees. Missing

employees are reported to LINDE HSSE Dept. When all clear is given check with LINDE HSSE before returning to work.

1. The following Personal Protective

Equipment shall be worn while tightening &

torqueing bolts in structural steel members:

Approved coveralls, safety glasses, safety

helmet, safety shoes, safety gloves & safety

harness.

Signature

OTHERS(List Below):

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NEW REVISED

RISK

RANK

1 1.1 Hand and finger injury. Do not use wrenches if the jaws

are sprung.

Do not use tools with loose,

cracked, splintered.

Ensure all bolt holes shall be

aligned during insertion of bolts.

1.2 Pinch point. Ensure that all hand tools are in

good condition.

Ensure qualified/ competent

employee to carry out the task.

Use the right tools for the job.

Keep away hand & finger from any

pinch point hazard.

1.3 Improper use of tool. All tools shall be inspected &

colour coded with the approved by

LINDE.

Use the right tool for the job.

Operate tools according to

manufacturers instruction.Use appropriate personnel

protective equipment.

Perform maintenance on tools

regularly.

Cheater bar are not allowed use

as an extension for tightening

bolts.

Falls of materials &

tools.

2.1.1 Install barricades "exclusion zone"

and secure the area with sign

boards to prevent unauthorized

entry.

2.1.1.1 Ensure to provide safety

nets,toe boards.

2.1.2 All materials shall be safety

lowered from one level to the next

either by hand-to-hand or by

securily attaching a rope and

hauling.

2.1.3 Tools shall be tied by a retaining

rope attached to the harness.

2.1.4 Provide adequate working

platforms

LOW2B

B 3

ITEM

LOW

SCOPE : METHOD STATEMENT FOR BOLT

TIGHTENING(PIPING & EQUIPMENTS)

Initial Risk Residual Risk

ACTIVITY P CCONTROLS

ADDITIONALR


T.4.250.955

CONSEQUENCES

HAZARD / POTENTIAL

CONTROLS

CURRENTP C

Bolts tightening for

Piping and Flanges

2.1Bolts torqueing final

tightening after

erection of structural

steel members and

Flanges

2

1.1.1

1.1.2

1.1.3

1.2.1

1.2.2

1.2.3

1.2.4

1.3.1

1.3.2

1.3.3

1.3.4

1.3.5

1.3.6

LOW

LOW2B

B 2

LOW

3A

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2

RISK

RANKITEM

SCOPE : METHOD STATEMENT FOR BOLT

TIGHTENING(PIPING & EQUIPMENTS)

Initial Risk Residual Risk

ACTIVITY P CCONTROLS

ADDITIONALR


T.4.250.955

CONSEQUENCES

HAZARD / POTENTIAL

CONTROLS

CURRENTP C

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2.2 2.2.1 Ensure all materials, tools,and

equipment are kept secure at all

times.2.2.2 Install lifting apparatuses such as

gin wheel and hoisting rope for

lifting pieces of materials.

2.2.3 Full body harness and lanyards

shall be inspected.

2.2.4 All employees shall wear

inspected full body harness fitted

with twin lanyards with shock

absorbers, each lanyard shall be

fitted with dual action self-locking

safety hook to allow for 100% Tie-

off.

2.2.5 Ensure housekeeping is done

regularly to maintain walkway free

of hazards.

2.3.1 Monitor wind speed using

Anemometer. Crane operations

should be stopped if wind speed

exceeds 25 knots or as stipulated

by crane manufacturer, which ever

is lower.

2.3.2 Employees should be aware of the

affect of weather conditions on the

operation.

B LOW4A

Ensure 100% fall protection.

Ensure that all employees

working at height are properly

trained.

Discuss working at height

hazards at daily TSTI.

2.2.1.1

2.2.1.2

2.2.1.3

2.3

LOW2

Fall of working

personnel at height.

B

Wind hazards.

MED4

QQQ AAA TTT AAA RRR

3

014-MS For Bolt Tightening (Piping& Equipments).pdf

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