Hallo!
I encountered the next problem:
According to ASME VIII, div 2, the maximum range of stress intensity for combined (primary and secondary) stresses is limited to 3 x Sm. Some stainless steel materials (e.g. 304L) have allowable stresses equal to 90% of yield stress at higher temperature...
We are calculating local stresses in shell from nozzle loads according to WRC 107 and WRC 297 using stress indices from ASME VIII div. 2, AD-560.7 for evaluating the effect of internal pressure. Vessels are designed as per ASME VIII div. 1 and div. 2. (fatigue analysis is not required).
As...