Dear Experts,
Piping Code : ASME B 31.1, Power Plant Piping, (P No.5A,11,12,15, 91 etc pipes) & ASME Sectin I
Contractor is doing piping fabrication stages in following manner,
Preheating & Welding of Piping joints then Post heating, then PWHT & then finally RT.
Contractor is arguing, RT is taken after PWHT to reveal the defects causing due to delayed cracking.
My question
If RT repair is done for particular joint after PWHT then is it compulsory to perform PWHT again for particular joint ? if yes then please mention the clause of code.
Thanks & Regards
Hiren Sevak
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