Relief Valves - Length of Vent Pipes
Calculate length of safety valves vent pipes.
Maximum length of relief valve vent lines
can be calculated as
lm = 0.56 (1.1 pr + 14.7)2 di5 / qa2 (1)
where
lm= maximum length of vent line (feet)
pr= relief pressure (psi)
di= inside diameter (inches)
qa= air flow (lbs./min)
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