1/4″ Schedule 40 Pipe | Actual ID = .365

The table below shows the airflow pressure drop in Pounds per Square Inch per 100 feet of schedule 40 pipe.

FOR EXAMPLE, if Jory has a line pressure of 100 PSIG with an airflow of 15 SCFM moving through the 100 feet of pipe, he would experience a drop in pressure of approximately 13 Pounds per Square Inch.

Line Pressure
(PSIG)
Free Air (SCFM)
5 10 15 20
40 3.30 12.50 27.25 47.80
60 2.40 9.15 20.00 35.00
80 1.90 7.20 15.75 27.60
100 1.60 5.95 13.00 22.80