Flow Capacity, ANSI Schedule 40 Pipe, Air - Engineers Edge

Fluid Flow Table of Contents
Hydraulic and Pneumatic Knowledge

Flow Capacity Pipe and Tubes ANSI schedule 40 pipe

The following chart contains the maximum recommended flow rates at the given pressure for ANSI schedule 40 pipe. This chart is applicable for designing compressed air systems.

The flow values in this chart are based on a pressure drop as set forth in the following schedule:

Pressure Drop per 100 Feet of Pipe	Pipe Size - Inches
10% of Applied Pressure	1/8, 1/4, 3/8, 1/2
5% of Applied Pressure	3/4, 1, 1-1/4, 1-1/2, 2, 1-1/2, 3

 

Nominal Standard Pipe Size - Inch
Derived Units = Pressure Drop per 100 Feet of Pipe (SCFM)
Applied Pressure psig	1/8	1/4	3/8	1/2	3/4	1	1-1/4	1-1/2	2	2-1/2	3
5	0.5	1.2	2.7	4.9	6.6	13	27	40	80	135	240
10	0.8	1.7	3.9	7.7	11.0	21	44	64	125	200	370
20	1.3	3.0	6.6	13.0	18.5	35	75	110	215	350	600
40	2.5	5.5	12.0	23.0	34.0	62	135	200	385	640	1100
60	3.5	8.0	18.0	34.0	50.0	93	195	290	560	900	1600
80	4.7	10.5	23.0	44.0	65.0	120	255	390	720	1200	2100
100	5.8	13.0	29.0	54.0	80.0	150	315	470	900	1450	2600
150	8.6	20.0	41.0	80.0	115.0	220	460	680	1350	2200	3900
200	11.5	26.0	58.0	108.0	155.0	290	620	910	1750	2800	5000
250	14.5	33.0	73.0	135.0	200.0	370	770	1150	2200	3500	6100

Related Pipe Schedule Resources: