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You're reading too much into my example. I just used air so it would be easy for anyone to reproduce my results. I typically deal with PSVs in gas processing plants. It was easier to use air than to provide a gas analysis. The purpose of my post was to confirm how the flow develops in the...

Thanks everyone. I appreciate the sanity check. Thanks for the link, Joe. Those guidelines are useful.

After perusing this forum and debating with my coworkers, I think I understand the approach to discharge pipe sizing...maybe. Can you guys let me know if this is right? For discussion's sake, let's assume: 1) PSV is 6M8 2) Flow medium is air 3) PSV rated flow is 264,000 lb/hr 4) Back pressure...

Thanks for looking, J.A.

Does anyone out there happen to have any old Texsteam relief valve catalogs? I'm looking for gas sizing coefficients for 7700 and 77000/87000 series relief valves. I tried the Texsteam and NASVI routes without any luck. Thanks in advance.

MJC, Thanks for the response. I'll give the manufacturer route a try.

Does anyone have any input on what size of hole might be expected in a plate exchanger if it should happen to rupture? Not quite as straight-forward as using the tube diameter in a shell and tube rupture case. Any advice is appreciated. Thanks.

Thanks for the responses, EGT01. I still haven't come across any official answer, but 300-350F seems to be the cutoff after which the aluminum starts to lose its strength and may not last for long at higher relief pressures. I'll probably stick with that temp range for my calculations. Thanks...

My question concerns sizing a pressure relief valve based on fire exposure. When calculating the heat absorption across the unwetted surface of a vessel, API 520 recommends using 1100 F as the vessel wall temperature for a carbon steel vessel. Anyone know what wall temperature to use for...