PSV on loading rack terminal
PSV on loading rack terminal
(OP)
I have a design for metering skid for loading trucks at a terminal. flow is 500 gpm, with 50 psig and medium is Diesel.
Do I need a PSV if customer P&ID didn't specified it.
Thanks,
Do I need a PSV if customer P&ID didn't specified it.
Thanks,





RE: PSV on loading rack terminal
Many loading applications need a psv, due to fast opening and closing times of valves.
I assume you are the equipment vendor, so you will more than likely be at fault if you think you need a psv, but you don't bring that "oversight" of the failure to include a psv on the PID to the customer's attention.
You could always do a surge analysis to see if you need one or not.
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"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/
RE: PSV on loading rack terminal
I did bring it to the attention to customer about adding, but since now I have two choices only, either to include (2) Kunkle 2x3 PSV staggered with 10% less set pressure downstream than the one at upstream OR go with (1) Crosby 3x4 valve.
I spoke to another expert who has done few of these systems for loading tank truck at terminal, according to him he hasn't included any ever.
I don't have a program or expertise to do surge analysis.
thanks,
RE: PSV on loading rack terminal
RE: PSV on loading rack terminal
**********************
"Pumping accounts for 20% of the world's energy used by electric motors and 25-50% of the total electrical energy usage in certain industrial facilities."-DOE statistic (Note: Make that 99% for pipeline companies) http://virtualpipeline.spaces.live.com/