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Hello all, I am trying to size a relief valve for a water storage vessel for fire case. Normally I would use CGA s1.2 for ammonia and use posted Gi/Gu values. But let's say there is only water in the vessel. I want to size a valve for fire case where water boils and turn into steam and steam...

Thanks for replies. I am also looking at stiffening ring size in DIV 2 section 4.4.5. There is a local geometry check (d) but there is also a shear check (f). What would that be for?

Hello, I am learning about pressure vessel design for external pressure (vacuum). Just doing the exercise. Not designing the actual vessel. I came across cautionary note in UG-29 (a) that the stiffening ring may be subject to lateral buckling. And this should be considered in addition to the...

I saw the replies by Marty007 & Stnman. That's what I think as well. Thanks!

Hi IdanPV, I am aware that the attachment (y-2) is not included in exemption UW-15(b)(1). I am talking about UW-15(b)(2) exemption. The opening is exempt from reinforcement calculation because of finished diameter less that 2-3/8”. Would that exempt me from UW-15(a) calculations even when...

IdanPV, I am attaching the nozzle using (y-2) with size exemption. I understand that it is not listed in UW-15(b). But I am asking about exemption UW-15(b)(2). I know -15(b)(1) does not apply.

Hello all, Consider a case where a standard 1"-6000# threaded coupling is being attached to a pressure vessel by outside and inside fillet welds only. It can be attached using figure UW-16.1 sketch (y-2). However, I am using exemption UW-16(f)(2) and using minimum fillet weld sizes. To use...

Hello all, Just wondering if any of you came across a good guidebook to properly size excess flow valves for Propane. Please share. Thanks