Dear All,

I did a fatigue analysis calculation a while ago in which the decisive case was the pressure cycles (10^6 times). I used the ASME VIII D2 graphs to figure out the corresponding stress limits for the calculation.(I know that the graphs have been replaced by some formulas in the recent revisions)
our client has recently demanded a fatigue evaluation based on B31.3 and not ASME since the design code is B31.3 and by that, they mean using the "right" f factor in the formula f(1.25Sc+0.25Sh). I might be way off but I thought that the aformentioned formula is applicable for thermal cycles only. could anyone clarify?