All toolsCalculatorsMechanicalCompressed Air Pipe Sizing
Compressed Air Pipe Sizing
Size compressed-air distribution pipework segments by pressure drop against the 0.10 bar allowance (Atlas Copco Compressed Air Manual), with a velocity check.
The Ensign ToolboxCompressed Air Pipe SizingSize compressed-air distribution pipework segments by pressure drop against the 0.10 bar allowance (Atlas Copco Compressed Air Manual), with a velocity check.
Supply
bar(a)
Absolute pressure at the compressor/receiver outlet
Pipework path — compressor/receiver outlet to the worst-case point of use
m
%
Equivalent-length allowance, elbows/tees/valves
L/s FAD
Free Air Delivery carried by this segment
| Segment | Length | Fittings | Flow | |
|---|---|---|---|---|
| 1 | 40 m | 10% | 60 L/s | |
| 2 | 25 m | 15% | 25 L/s |
Within allowance0.0831 / 0.10 bar
Total pressure loss
0.0831 bar
Allowance
0.10 bar
Spare margin
0.0169 bar
% of supply pressure
1.2%
Segment sizing breakdown
| # | Flow | Adj. length | Size | Loss/m | Loss | Velocity | Status |
|---|---|---|---|---|---|---|---|
| 1 | 60.0 L/s | 44.00 m | DN40 (1½") | 0.00091 bar/m | 0.0402 bar | 6.2 m/s | OK |
| 2 | 25.0 L/s | 28.75 m | DN25 (1") | 0.00149 bar/m | 0.0429 bar | 6.0 m/s | OK |