Below are my answers for your question regarding BAWC liquid release case on 5-Aug krub.
1. Why PSV-1211 setpoint is only 550 psig?
a. Design document is missing but It’s likely that PSV-1211 was set at 550 psig since day one
(Protecting Instrument Gas skid)
b. From a preliminary review, I believe that this is a wrong design. This PSV should be removed.
(Need to study in-detail)
2. Why operating pressure went above PSV setpoint?
a. From Jan13-Aug14 data, normal operating pressure of BAWC varies between 500-630 psig, so this PSV should have been activated so many times in the past in normal operation. (This time it might open for quite a long time that liquid release out of the vent tip)
FYI, I should be able to finalize everything and get MOC approved to make any change required in 2-4 weeks krub.