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Compressed Air - Hose Friction

Pressure loss in air hoses at various pressure

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Compressed air friction loss in hoses are indicated below. Gauge pressure

  • 50 psi - black line
  • 70 psi - red line
  • 90 psi - yellow line
  • 110 psi - blue line

air hose friction loss pressure drop

  • 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

Example - Pressure Loss in Compressed Air Hose

The air flow in a 3/4" pipeline with 90 psi pressure is 30 cfm.

From the second diagram above we can estimate the friction loss to be approximately  0.4 psi/50 ft.

The friction loss in a 10 ft hose can be calculated as

(0.4 psi/50 ft) (10 ft) / (50 ft) = 0.08 psi

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Related Documents

Tag Search

  • en: air hose friction
  • es: fricción manguera de aire
  • de: Luftschlauch Reibungs
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