Dear all,
i have a project in ASME VIII div. 1 with a U-tube bundle in stainless steel 321, H2/H2S service. I have to take a decision regarding solution annealing after bending (bent part + 300 mm straight). In my knowledge there's no recommendations about annealing after bending in ASME code. It seems annealing is based only on manufacturer expericence. Am i right?
The only thing pushing me for solution annealing on all bends is the H2/H2S service, just to have low hardness value on bent parts.

really appreciate your help, thanks!

REFER UHA-44 CALCULATE PERCENTAGE STRAIN & THEN REFER TABLE UHA-44