Pipesnpumps, thank you for your insightful reply to my query. Unfortunately, I don't know anybody that is connected to NFPA committee. I do agree that only them can clarify what was stipulated on their code. I was hoping somebody from here is a member of the org and would be so kind enough to...
b1ueshift,
thanks again for your prompt reply.
i am re-reading that NFPA clause and your replies and it seems like i may not be of the same page as you. section 4.18.7.1 says
"Where a pressure relief valve has been piped back to suction, a circulation relief valve sized in accordance to...
blueshift,
thanks for your reply. you are correct, this is all from the 2010 edition.
the PSV is only during overspeed scenario. our piping system can withstand the normal pump high pressure scenario as calculated max suction + shut-off differential (with consideration of stat head). so the...
Dear FW Experts,
According to NFPA 20 section A.4.18.1, the fire water system has to be evaluated during when the diesel fire pumps are on overspeed scenario. The overspeed switch is typically set to limit at 10% of rated speed. A PSV is required if the piping component ratings are exceeded by...
