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Compressed Air - Size of Pipe vs. Capacity

Recommended air pipe line sizes with schedule 40 steel pipes and air pressure 100 psi (6.9 bar, 689500 Pa):

Compressed Air - Recommended Size of Pipe vs. Capacity

Free Air Flow
(cfm)

Recommended Pipe Size (inches)
Length of Pipe (feet)
255075100150200250
5 1/2 1/2 1/2 1/2 1/2 1/2 1/2
10 1/2 1/2 1/2 1/2 1/2 1/2 1/2
15 1/2 1/2 1/2 1/2 3/4 3/4 3/4
20 1/2 1/2 3/4 3/4 3/4 3/4 3/4
25 1/2 3/4 3/4 3/4 3/4 1 1
30 1/2 3/4 3/4 3/4 1 1 1
35 3/4 3/4 3/4 3/4 1 1 1
40 3/4 3/4 3/4 1 1 1 1
45 3/4 3/4 1 1 1 1 1 1/4
50 3/4 1 1 1 1 1 1/4 1 1/4
55 3/4 1 1 1 1 1/4 1 1/4 1 1/4
60 3/4 1 1 1 1 1/4 1 1/4 1 1/4
65 3/4 1 1 1 1 1/4 1 1/4 1 1/4
70 3/4 1 1 1 1/4 1 1/4 1 1/4 1 1/4
75 1 1 1 1 1/4 1 1/4 1 1/4 1 1/4
80 1 1 1 1/4 1 1/4 1 1/4 1 1/4 1 1/4
85 1 1 1 1/4 1 1/4 1 1/4 1 1/4 1 1/4
90 1 1 1 1/4 1 1/4 1 1/4 1 1/4 1 1/2
95 1 1 1/4 1 1/4 1 1/4 1 1/4 1 1/4 1 1/2
100 1 1 1/4 1 1/4 1 1/4 1 1/4 1 1/2 1 1/2

Related Topics

• Gases and Compressed Air

Air, LNG, LPG and other common gas properties, pipeline capacities, sizing of relief valves.

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Compressed Air Pipe Line Capacity

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Fittings in compressed air pipe lines and equivalent length pressure drop.

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Pressure drop in compressed air pipelines with applied pressure 50, 100 and 150 psi.

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Pressure loss in pneumatic tubes - sizes ranging 5 - 36 mm.

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