Air Pressure Loss per Foot in Steel Pipe Table

Fluids Flow Engineering
Hydraulic & Pneumatic Design Engineering

Air Pressure Flow Loss in Steel Pipe and Tubes

The following chart contains the estimated pressure drop at the given CFM of free air flow for steel pipe. This chart is applicable for designing compressed air systems.

All dimensions sizes given in inches.

CFM of
Free
Air
Air Pressure Loss PSI in 100 Ft. of Steel Pipe -
Based on 100 psi at pipe entrance
Nominal Pipe Diameter
1/2
3/4
1
1 1/4
1 1/2
2
2 1/2
3
10
0.40
0.10
0.03
0.007
20
1.40
0.35
0.10
0.026
0.012
30
3.15
0.70
0.25
0.056
0.026
40
5.50
1.30
0.40
0.096
0.044
50
8.60
2.00
0.60
0.146
0.067
0.200
0.008
60
2.80
0.85
0.210
0.095
0.027
0.011
70
3.80
1.10
0.280
0.130
0.036
0.015
80
5.00
1.40
0.360
0.160
0.046
0.019
90
6.40
1.85
0.450
0.200
0.058
0.024
100
7.80
2.20
0.550
0.250
0.069
0.029
0.010
125
12.50
3.40
0.850
0.380
0.107
0.043
0.015
150
18.00
4.90
1.200
0.540
0.150
0.061
0.021
175
6.80
1.640
.0730
0.200
0.081
0.028
200
8.80
2.120
0.950
0.260
0.105
0.036
250
3.300
1.480
0.400
0.160
0.054
300
4.710
2.100
0.570
0.230
0.075
350
6.450
2.860
0.770
0.310
0.101
400
8.300
3.700
0.990
0.400
0.131
450
4.650
1.270
0.500
0.165
500
5.790
1.560
0.620
0.200
600
2.230
0.890
0.290
700
3.000
1.180
0.390
800
4.000
2.540
0.500
900
5.050
1.950
0.630
1000
6.200
2.370
0.780
1200
9.050
3.450
1.120
1500
14.500
5.390
1.730
2000
9.660
3.090
2500
4.850
3000
6.980

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