Dear All, This is for the Boiler final Superheater. FSH tube material is TP347H (please dont ask why as customer forced me use this as this is EFW Boiler). Header material is P22. I suggested Intermediate material of T91 otherwise i say they have welding issues due to different expansion and filler material (im not a welding engineer but process engineer). But customer wants to weld Austenite (TP304H) with Ferritic(P22). Can somebody through some insight and supporting codes if any??
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