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great feedback. Thanks

Thanks Steve. Since the heat treatment required for Code reasons and not Process reasons, I concluded that no-contact scenario with service may not be a good reason to waive PWHT. Therefore as you said, it can be relaxed if the code allows provide relaxation for this material group. Thanks for...

Part of it is topside piping to B31.3 and other part is pipeline to B31.4 and 31.8

Hi, Appreciate if somebody can provide some guidance here. We have a carbon steel base pipe (more than 20mm thick) with Alloy 626 clad. Sour service at fairly high pressure offshore application. Does the base metal require PWHT? If the base metal hardness is maintained with pre heating and...