Dear All
I have a question that during the design if I use the check valve (NRV) in relief header where different Pressure safety valve (PSV) reliefs lines are connecting so does the codes allow me to do so. I spend some time to find out in API 520 Part II & 521 but not very helpful in this regard. So if you guys have some idea or experience so please share.
Secondly what is the criteria of using spectacle blind at with the isolation valve at PSV discharge and inlet pipe?
Wait for your response!!!!