Compressed Air Pipes - Fittings and Pressure Loss
Fittings in compressed air pipe lines and equivalent length pressure drop.
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 |
Related Topics
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Gases and Compressed Air
Properties of air, LNG, LPG and other common gases. Pipeline capacities and sizing of relief valves.
Related Documents
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Compressed Air - Friction Loss in Hoses
Friction loss in air hoses vs. operating pressure. -
Compressed Air - Pipe Line Pressure Drop Diagram
Calculate pressure drop in compressed air pipe lines with a nomograph diagram. -
Compressed Air - Size of Pipe vs. Capacity
Air pipe lines capacities at pressure 100 psi (6.9 bar). -
Compressed Air Pipe Line Capacity
Capacities of compressed air pipelines - pressure ranging 5 - 250 psi (0.5 - 17 bar).
