Check valves in relief path
Check valves in relief path
(OP)
Are there any rules preventing you from installing check valves into a line that forms the relief path of a vessel protected against fire?
Also, are there any peculiarities with Stoomwezen rules in this case?
Thanks
Also, are there any peculiarities with Stoomwezen rules in this case?
Thanks





RE: Check valves in relief path
Maybe you should tell us why you want to install the check valves? What are Stoomwezen rules?
The big concern I would have is if you have a relief situation and the check valve is stopping flow coming from somewhere else you could have a large backpressure to deal with.
My two cents.
StoneCold.
RE: Check valves in relief path
RE: Check valves in relief path
I a relief header all valve should be "closed" (either PSV og BDV's). Thus back-flow cant occur.
A design where check valves are required should be considered redone imho
Best regards
Morten
RE: Check valves in relief path
Don't put anything in the discharge line from a "code" relief valve. It's poor practice if not forbidden by code.
RE: Check valves in relief path
RE: Check valves in relief path
StoneCold
RE: Check valves in relief path
The system is a serious of liquid filled wash towers. Check valves are installed between the towers to prevent back contamination of one solvent to another. The relief path of the first tower is through the subsequent towers so the check valve is in the relef path but is not the relief device itself.
Guido's response seems to give me the answer I was looking for.
Thanks again.