Compressed Air - Friction Loss in Hoses
Calculate friction loss in compressed air hoses based on pipe diameter, flow rate, pressure, and hose length
Conversion Factors
- 1 psig = 6.9 kPa = 0.069 bar
- 1 inch = 25.4 mm
- 1 ft (foot) = 0.3048 m
- 1 scfm = 0.472 nl/s
Formula
Friction Loss = (Reference Loss / Reference Length) × Hose Length
Example
For a 3/4" hose with 90 psi pressure and 30 cfm flow rate:
- Reference friction loss: 0.4 psi per 50 ft
- For a 10 ft hose: (0.4 psi / 50 ft) × 10 ft = 0.08 psi