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P1 to P11 welding procedure
Posted: 13 Aug 2025, 10:00
by novice123
Please share with me the basic welding procedure to weld P1 to P11, including the recommended consumable, preheat and post heat requirements for 11 mm piping joint.
Re: P1 to P11 welding procedure
Posted: 15 Aug 2025, 07:31
by ben
Apply 149 C preheat
ER80S-D2
E7018-A2
Maintain 316 C interpass, max.
704-760 C post weld heat treatment following ASME B31.3 for t > 13 mm or material with TS > 71 ksi. Apply that for 1 hour per 25 mm thickness with minimum holding time of 2 hours.
Hardness should remain at 225 BHN.
Re: P1 to P11 welding procedure
Posted: 19 Aug 2025, 15:46
by mechcolor
Table A-1 of API 582 suggests the following:
Use E70XX-A1 or E70XXB2L or E80XXB2 low hydrogen.
Attached the reference here.
Table A-1 API 582j.jpg
ben wrote: 15 Aug 2025, 07:31
Apply 149 C preheat
ER80S-D2
E7018-A2
Maintain 316 C interpass, max.
704-760 C post weld heat treatment following ASME B31.3 for t > 13 mm or material with TS > 71 ksi. Apply that for 1 hour per 25 mm thickness with minimum holding time of 2 hours.
Hardness should remain at 225 BHN.
Re: P1 to P11 welding procedure
Posted: 19 Aug 2025, 18:54
by novice123
Thanks, appreciate for the reference, mechcolor.