I have some 3 and 4" Sch. STD A-106 Gr. B pipe with a design minimum temperature of -20F per curve B of Figure 323.2.2A. I am planning to use para 323.2.2(b) and Figure 323.2.2B to calculate my stress ratio and exempt it from impact testing with a new design minimum temperature of -50F.
Looking...
I've noticed quite a few U-stamped shell and tube heat exchangers designed to BPVC.VIII.1-2017 that list the external MAWP of the inner chamber (tubeside) as either N/A or 15 psig on the U-1 form (line 16). I've seen it across the board with a wide range of shellside and tubeside design...
A question came up regarding a pressure vessel we are manufacturing. I included a sketch below for clarity.
We are supplying vessel #1 (blue) which is installed inside a drum (vessel #2). Vessel #1 carries a U-stamp. It has some piping connected to it which is designed to B31.3, the parts in...
