Recent content by Sh1ps

Q-Goest, Thanks for the quick response. Yes, Section VIII, Div 1 was used according the drawing I have. There is no nameplate but the stamped info does not show a dual rating - so no luck there. Am I correct in assuming that using a lower temperature rating would allow for a higher MAWP...

A pressure vessel is stamped with an MAWP of 150 psi at 450ºF. We are operating at 120 psi at ambient temperatures around 70ºF. Is it allowed to operate at the MAWP with a relief valve set to 165 psi if operating temperatures are always at the ambient level.