Relief Valves - Length of Vent Pipes

Calculate length of safety valves vent pipes. Determines the maximum length of relief valve vent lines based on relief pressure, inside diameter, and air flow.

Calculator

Inputs

Relief Pressure (pr) (psi)

Inside Diameter (di) (inches)

Air Flow (qa) (lbs./min)

Results

Maximum Length of Vent Line (lm)-- feet

Relief Pressure (psi)	Inside Diameter (inches)	Air Flow (lbs./min)	Maximum Length (feet)
25	0.5	50	0.89
25	1	100	14.22
25	1.5	150	80.37
50	0.5	75	2.16
50	1	150	34.56
50	1.5	225	195.52
100	0.75	100	29.88
100	1.25	200	234.38
100	1.5	250	336.67