Compressed Air Pipes - Fittings and Pressure Loss
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Pressure drop in compressed air pipe line fittings can be expressed as equivalent length in meters of pipe line.
Fitting | Equivalent Pipe Length (m) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Nominal Pipe Size (mm) | ||||||||||
| 15 | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | |
| 90o bend | 0.15 | 0.2 | 0.25 | 0.35 | 0.5 | 0.6 | 0.8 | 1.0 | 1.2 | 1.5 |
| 90o elbow | 0.25 | 0.4 | 0.5 | 0.65 | 0.8 | 1.0 | 1.4 | 1.8 | 2.4 | 3.2 |
| Tee - run | 0.2 | 0.3 | 0.4 | 0.5 | 0.7 | 0.85 | 1.1 | 1.3 | 1.6 | 2.0 |
| Tee - side outlet | 0.5 | 0.7 | 1.4 | 1.8 | 2.4 | 2.7 | 3.6 | 4.6 | 5.7 | 7.0 |
Example - Compressed Air Pipe Line and Equivalent Length
A 90o bend equals to a 0.6 m50 mm pipe line.
Fitting | Equivalent Pipe Length (ft) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Nominal Pipe Size (inches) | ||||||||||
| 1/2" | 3/4" | 1" | 1 1/4" | 1 1/2" | 2" | 2 1/2" | 3" | 4" | 5" | |
| 90o bend | 0.5 | 0.7 | 0.8 | 1.2 | 1.7 | 2 | 2.6 | 3.3 | 4 | 5 |
| 90o elbow | 0.8 | 1.3 | 1.7 | 2.1 | 2.6 | 3.3 | 4.6 | 5.9 | 7.9 | 10.6 |
| Tee - run | 0.7 | 1 | 1.3 | 1.7 | 2.3 | 2.8 | 4.4 | 4.3 | 5.3 | 6.6 |
| Tee - side outlet | 1.7 | 2.3 | 4.6 | 5.9 | 7.9 | 8.9 | 11.9 | 15.1 | 18.8 | 23.1 |
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Related Topics
• Gases and Compressed Air
Properties of air, LNG, LPG and other common gases. Pipeline capacities and sizing of relief valves.
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