Proposed Repair Welding Procedure Specification (RWPS) : JOINTS (QW - 402) [PDF]

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PROPOSED REPAIR WELDING PROCEDURE SPECIFICATION (RWPS)



JINDAL SAW LIMITED IPU, MUNDRA, INDIA



WPS No.



: RWPS/ONGC/61



DATE



: 26.07.2010



REVISION (S)



: 02



Client : M/S ONGC Client Spec: 2020D Rev0 Company : M/S SWIBER OFFSHORE CONSTRUCTION PTE LTD Size : 18" OD x 15.90 mm / 22.2 mm WT Project : NORTH TAPTI GAS FIELD DEVELOPMENT PROJECT OF ONGCL P.O. No. : 4500001953 DATED 26.04.2010 Category: Longitudinal Seam Submerged Arc Welded line pipes Welding Process (es) Welding Position TYPE (S)



: MANUAL : 1G : SMAW - MANUAL



COMPANY NAME :-



JINDAL SAW LIMITED.



JOINTS (QW -402) Details: Backing



(Yes)



√



Backing Material (Type)



Weld Metal



(No) 0.7 T Max



T Metal



Non Fusing Metal



Non Metallic



Other



* BASE METALS (QW-403) Specification type and grade To specification type and grade Thickness Range Pipe Dia. Range



: : : :



API 5L X-60 API 5L X-60 UP TO T N/A



* FILLER METALS (QW -404) 404) Spec. No. (SFA) AWS No. (Class) Filler Metal F-No. Weld Metal Analysis A-No. : Size of Filler Metals Weld Metal Thickness Range Wire Trade Name



: : : : : : :



SMAW 5.5 E8018 G 04 01 4.0 mm, 3.15 mm 0.7 T SUPRATHERM -NI SPL



ELECTRODE : D&H



POSITIONS (QW-405) Position (s) of Groove Welding Progression Position (s) of Fillet



PREHEAT (QW-406) : 1G : NA : NA



Up.______Down _____



POSTWELD HEAT TREATMENT (QW-407) Temperature Range Time Range



Pre Heat Temp. (Min.) Interpass Temp. (Max.) Pre Heat Maintenance



NA 200°C  NA



GAS (QW-408)



: NA : NA



Shielding: Trailing : Backing : * Each base metal -filler metal combination should be recorded individually.



(VIVEK GAHLOT) PREPARED BY JINDAL SAW LIMITED



: : :



(PUNIT DUBEY) REVIEWED BY JINDAL SAW LIMITED



Gas(es) NA NA NIL



Flow Rate (Lpm)



APPROVED BY



02



PROPOSED REPAIR WELDING PROCEDURE SPECIFICATION (RWPS)



JINDAL SAW LIMITED IPU, MUNDRA, INDIA Current Polarity



: RWPS/ONGC/61



WPS No. DATE



: 26.07.2010



REVISION (S)



: 02



: DC : DC +



TECHNIQUE (QW-410) String or Weave Multiple or Single Pass Multiple or Single Electordes Other



: : : :



String Mutiple pass Single Electrode (SMAW) NIL



SR. NO.



PASS NO.



ELECTRODE SIZE (mm)



CURRENT (Amps)



POLARITY



VOLTAGE Volts



SPEED (mm/min.)



HEAT INPUT KJ/MM



1



1



3.15



80-150



DC(+)



22-32



80-200



1.38



2



2



4.00



100-200



DC(+)



22-32



80-200



1.79



3



3



4.00



100-200



DC(+)



22-32



80-200



1.79



AS PER API 5L ANNEX C AND CS APPENDIX B AS FOLOWS: •



NO REPAIR TO BE DONE ON PIPE BODY.



•



NO WELDING REPAIR SHALL BE CARRIED OUT ON PIPE AFTER COLD EXPANSION.



•



CUMULATIVE LENGTH OF REPAIR SHALL NOT EXCEED 5% OF PIPE LENGTH.



WELD DEFECTS SEPARATED BY LESS THAN 100 MM SHALL BE REPAIRED AS A CONTINUOUS SINGLE WELD REPAIR. EACH SINGLE • REPAIR SHALL BE CARRIED OUT WITH MINIMUM TWO LAYER/PASSES OVER A LENGTH OF AT LEAST 50 MM. •



REPAIR WELDING OF CRACKS IS NOT ALLOWED.



•



THROUGH THICKNESS REPAIR SHALL NOT BE ALLOWED.



•



PIPES REPAIRED SHALL BE ULTRASONICALLY & X- RAY TESTED.



•



REPAIR WELDING OF PREVIOUSLY REPAIRED AREA IS NOT ALLOWED.



•



REPAIR AT PIPE ENDS UP TO 300 MM IS NOT ALLOWED.



(VIVEK GAHLOT) PREPARED BY JINDAL SAW LIMITED



Page 2 of 2



(PUNIT DUBEY) REVIEWED BY JINDAL SAW LIMITED



JSLM/IPU/QA/061 REV 00



APPROVED BY



02