In the FEED of a project I am supervising, the consultant designed the oil and gas processing facility so that some PSVs (PSVs in the inlet manifold and for the dehydrator and desalter) are connected to a closed drain system other than to the flare system. The set pressure of PSVs in the inlet manifold is 60 barg, so what are the consequences if we go with this option, especially for PSVs in the inlet manifold? Many standards do not recommend connecting PSVs to closed drain systems. For me, I have never seen such design before . When we asked Consultant about the reason for the connecting PSVs of dehydrator and desalter to CDS, they said it is possible since the governing case for them liquid blocked outlet and the liquid is relieved not gas.
I appreciate your opinions and suggestions,
Thank you in advance..
Edited by _1angelia23, 12 January 2025 - 09:29 AM.