Hello Guys, i have a question regarding the weld beatween a pipe carbon steel cladded with uns 6625 wall thk 28mm. The consumable required is UNS 6625 . My client required pwht according to B. 31.3 but i would not to do pwht because the uns 6625 not required this procedure. The weld literature do not recomanded the pwht for joint welded with UNS 6625. I have proposed to increase the preheat permitted by ASME VIII but i'am not sure that to will be approved. Do you have some suggestion? Do you know if there are Asme interpretation?
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