Pressure Loss in Compressed Air Pipe Lines

Pressure drop in compressed air pipe lines

Pressure drop in compressed air pipe lines depends on the line pressure, the air flow and the size of pipe. Pressure loss in schedule 40 steel pipes with compressed air ranging 50 to 125 psig can be estimated from the table below.

NPS
(in)
Air Flow1)
(SCFM)
Pressure Loss per 100 ft pipe (psi)
Line Pressure (psig)
50 75 100 125
1/2 10 0.7 0.5 0.4 0.3
20 2.7 2.0 1.6 1.3
30 5.9 4.3 3.4 2.8
40 7.5 5.8 4.8
50 9.0 7.4
60 12.9 10.6
3/4 10 0.2 0.15
20 0.9 0.5 0.4 0.3
50 3.8 2.7 2.1 1.8
80 6.8 5.2 4.4
100 10.6 8.3 7.0
125 12.9 10.7
150 13.9
1 20 0.2 0.1 0.1
50 1.1 0.8 0.6 0.5
75 2.6 1.7 1.3 1.1
100 4.1 3.0 2.3 1.9
125 6.3 4.5 3.5 2.9
150 6.5 5.1 4.2
200 8.9 7.3
250 11.3
1 1/2 50 0.1
75 0.3 0.2 0.15 0.1
100 0.5 0.3 0.3 0.2
125 0.7 0.5 0.4 0.3
150 1.0 0.8 0.6 0.5
200 1.8 1.3 1.0 0.8
250 2.8 2.0 1.6 1.3
300 4.0 2.9 2.3 1.9
400 7.0 5.0 4.0 3.2
500 7.8 6.2 5.1
600 8.8 7.2
700 11.9 9.8
800 12.8
2 100 0.1
150 0.3 0.2 0.2 0.1
200 0.5 0.4 0.3 0.2
250 0.8 0.6 0.4 0.4
300 1.1 0.8 0.6 0.5
400 1.9 1.4 1.1 0.9
500 2.9 2.1 1.7 1.4
600 4.2 3.0 2.4 2.0
800 5.4 4.2 3.4
1000 8.3 6.5 5.3
1250 10.0 8.3
1500 11.9
2 1/2 150 0.1
200 0.2 0.15 0.1
250 0.3 0.2 0.2 0.1
300 0.5 0.3 0.3 0.2
400 0.8 0.6 0.5 0.4
500 1.2 0.9 0.4 0.6
600 1.7 1.3 1.0 0.8
800 3.0 2.2 1.7 1.4
1000 4.7 3.4 2.7 1.9
1250 7.5 5.4 4.2 3.5
1500 7.5 5.9 4.8
2000 10.3 8.5
2500 13.3
3 300 0.1 0.1
500 0.4 0.3 0.2 0.2
750 0.8 0.6 0.5 0.4
1000 1.5 1.1 0.8 0.7
1500 3.3 2.4 1.9 1.5
2000 5.9 4.2 3.3 2.7
2500 5.6 5.1 4.2
3000 9.4 7.4 5.1
3500 10.1 8.3
4000 13.1 10.8
4500 13.6
4 750 0.2 0.15 0.1
1000 0.4 0.3 0.2 0.2
1500 0.8 0.6 0.5 0.4
2000 1.5 1.1 0.8 0.7
2500 2.2 1.6 1.3 1.1
3000 3.2 2.3 1.8 1.5
4000 5.7 3.4 3.2 2.6
5000 6.3 5.0 4.1
6000 9.0 7.1 6.8
7000 9.7 7.9
8000 12.7 10.3

1) Free Air Inflow Volume Flow at Standard Conditions

Related Mobile Apps from The Engineering ToolBox Engineering Toolbox Apps

- free apps for offline use on mobile devices.

Related Topics

  • Gas and Compressed Air - Gas properties, capacities of pipelines, sizing of relief valves - air, LNG, LPG and more

Related Documents

Tag Search

  • en: compressed air pressure drop loss pipe pipes lines

Search the Engineering ToolBox

- "Search is the most efficient way to navigate the Engineering ToolBox!"

Engineering ToolBox - SketchUp Extension - Online 3D modeling!

3D Engineering ToolBox Extension to SketchUp - add parametric components to your SketchUp model

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your SketchUp model with the Engineering ToolBox - SketchUp Extension/Plugin - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro. Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!

Translate the Engineering ToolBox!
About the Engineering ToolBox!

close