Please eloborate how compressive stresses for elemets are calculated in PVElite for ASME stack.
Actually I have gone through ASME STS-1'2006 clause 4.4.1 shows way to calculate compressive stresses but there is no formula for t/D>10*Fy/E, how PVElite taking care this while calculating compressive stresses.
I prepared XL sheet for allowable compressive stress calculation results are ok & matching with PVElite allowable till condition of equation 4-8 & 4-9 satisfied, but for t/D>10*Fy/E stresses are not matching. In XL sheet, for t/D>10*Fy/E I have considerd Ks=0 & calculated allowable compressive.

Please guide how PVElite evaluated these stresses.

Thanks
RUPESH M UBALE