Compressed Air - Size of Pipe vs. Capacity
Air pipe lines capacities at pressure 100 psi (6.9 bar).
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Recommended air pipe line sizes with schedule 40 steel pipes and air pressure 100 psi (6.9 bar, 689500 Pa):
Free Air Flow (cfm) | Recommended Pipe Size (inches) | ||||||
|---|---|---|---|---|---|---|---|
| Length of Pipe (feet) | |||||||
| 25 | 50 | 75 | 100 | 150 | 200 | 250 | |
| 5 | 1/2 | 1/2 | 1/2 | 1/2 | 1/2 | 1/2 | 1/2 |
| 10 | 1/2 | 1/2 | 1/2 | 1/2 | 1/2 | 1/2 | 1/2 |
| 15 | 1/2 | 1/2 | 1/2 | 1/2 | 3/4 | 3/4 | 3/4 |
| 20 | 1/2 | 1/2 | 3/4 | 3/4 | 3/4 | 3/4 | 3/4 |
| 25 | 1/2 | 3/4 | 3/4 | 3/4 | 3/4 | 1 | 1 |
| 30 | 1/2 | 3/4 | 3/4 | 3/4 | 1 | 1 | 1 |
| 35 | 3/4 | 3/4 | 3/4 | 3/4 | 1 | 1 | 1 |
| 40 | 3/4 | 3/4 | 3/4 | 1 | 1 | 1 | 1 |
| 45 | 3/4 | 3/4 | 1 | 1 | 1 | 1 | 1 1/4 |
| 50 | 3/4 | 1 | 1 | 1 | 1 | 1 1/4 | 1 1/4 |
| 55 | 3/4 | 1 | 1 | 1 | 1 1/4 | 1 1/4 | 1 1/4 |
| 60 | 3/4 | 1 | 1 | 1 | 1 1/4 | 1 1/4 | 1 1/4 |
| 65 | 3/4 | 1 | 1 | 1 | 1 1/4 | 1 1/4 | 1 1/4 |
| 70 | 3/4 | 1 | 1 | 1 1/4 | 1 1/4 | 1 1/4 | 1 1/4 |
| 75 | 1 | 1 | 1 | 1 1/4 | 1 1/4 | 1 1/4 | 1 1/4 |
| 80 | 1 | 1 | 1 1/4 | 1 1/4 | 1 1/4 | 1 1/4 | 1 1/4 |
| 85 | 1 | 1 | 1 1/4 | 1 1/4 | 1 1/4 | 1 1/4 | 1 1/4 |
| 90 | 1 | 1 | 1 1/4 | 1 1/4 | 1 1/4 | 1 1/4 | 1 1/2 |
| 95 | 1 | 1 1/4 | 1 1/4 | 1 1/4 | 1 1/4 | 1 1/4 | 1 1/2 |
| 100 | 1 | 1 1/4 | 1 1/4 | 1 1/4 | 1 1/4 | 1 1/2 | 1 1/2 |
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