They are employing Div. 1 Appendix 46 (e.g., Div. 2) for the (4) manways. All the other (20) or so nozzles are Div. 1 (including a 30" nozzle).
this vessel is a replacement for another (replace 316L with 2205 duplex). The former vessel had 20" manways (which gave a little bit of clearance from...
Hello...first time posting in long time. We're reviewing vendor calculations for a Sect. VIII, Div 1 pressure vessel. We have a situation where the edge of the 24" manway is 1/2" from a circumferential shell seam (upper head attachment). For this manway, the vendor used Div. 2 4.5.5 to...
We're being asked to re-rate a pressure vessel for potentially a higher MAWP. The material that the vessel was constructed of is SA-212-B, which is no longer within the allowable stress tables (discontinued mid 19060's i believe). What guidance does ASME provide to perform this...
Client has an air cooled heat exchanger...circa 1950's. nozzles are ANSI 6"-1500# ring-joint flanges. I do not believe the API 661 table for allowable nozzle loads would apply (think it's very, very conservative for 1500# nozzles). Any suggestions how we can establish allowable nozzle loads...
Found the answer:
current code allowable for A387 Gr. 11 is 5,880 PSI at 1010F, vs. 7,340 PSI for A387 Gr. C when the unit was built.
in this case, the allowable got smaller.
we are trying to model a vessel designed and built in 1974 so we can assess if a higher SG fluid can be used. Applying current Section VIII, Div. 1 code edition software a portion of the vessel shell fails (significantly) at the original design condition (before we bumped up the fluid SG)...
