Pressure Relief Valve Discharge Pipe Sizing
Pressure Relief Valve Discharge Pipe Sizing
(OP)
I could use some guidance on sizing relief valve discharge pipes. I have an industrial waste water treatment plant that has 2 filter banks for final polishing of treated water before it is discharged. One bank treats 6,700 GPM and the other 3,300 GPM. The main influent lines have relief valves on them. The larger bank has a 10"x8" valve and the smaller has a 6"x8" valve.
Right now, the relief valve discharge lines just go a few feet out the wall and turn down to the ground. I have been asked to route the lines to a more suitable location for discharge, which is about 250' away. The friction losses and velocities in 10" pipe carrying 6,700 GPM and 8" pipe carrying 3,300 GPM are very large.
So, what is the proper way to size these lines? Is there a target velocity or friction loss I should shoot for? Also, can I combine the 2 into a single discharge header?
Thanks for your help
Right now, the relief valve discharge lines just go a few feet out the wall and turn down to the ground. I have been asked to route the lines to a more suitable location for discharge, which is about 250' away. The friction losses and velocities in 10" pipe carrying 6,700 GPM and 8" pipe carrying 3,300 GPM are very large.
So, what is the proper way to size these lines? Is there a target velocity or friction loss I should shoot for? Also, can I combine the 2 into a single discharge header?
Thanks for your help





RE: Pressure Relief Valve Discharge Pipe Sizing
David Simpson, PE
MuleShoe Engineering
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