Compressed Air - Size of Pipe vs. Capacity
Air pipe lines capacities at pressure 100 psi (6.9 bar).
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 |
