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Air Flow Through 10-Foot Long Tubes

*Pressure Drop Flow
1/8" OD Tube 1/4" OD Tube
psig kPa scfm l/m scfm l/m
10 69 0.5 14.2   3.0   85.0
20 138 0.8 21.2   4.8 136.0
30 207 1.1 29.7   6.6 187.0
40 276 1.3 37.4   8.5 241.0
50 345 1.6 45.3 10.4 295.0
60 414 1.9 53.0 12.2 346.0
70 483 2.2 60.9 14.2 402.0
80 552 2.4 68.7 16.0 453.0
90 621 2.7 77.2 18.0 510.0
100 690 3.0 85.0 19.8 561.0

For flows at lower pressure, consult more complete references. The above are representative flows for estimating purposes. Wall thicknesses are: 1/8" tube, 0.21" wall; 1/4" tube, .035" wall.

*Values are for discharge to standard atmospheric pressure.

Gas Facts

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