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# PE, PEH and PVC Pipes - Pressure Loss vs. Water Flow Diagram

## Pressure loss (bar/100 m) and velocy in PE, PEH or PVC pipes with water flow.

Pressure drop in PE, PEH or PVC plastic pipes or tubes:

• 1 Pa = 10-6 N/mm2 = 10-5 bar = 0.1020 kp/m2 = 1.020x10-4 m H2O at 4°C/39°F = 9.869x10-6 atm = 0.004 in H2O= 1.450x10-4 psi (lbf/in2) = 0.02089 lbf/ft2 (psf)
• 1 m3/s = 3600 m3/h = 1000 l/s = 35.32 ft3/s = 2118.9 ft3/min = 13198 gal(UK)/min = 15850 gal(US liq)/min = 791891 gal(UK)/h = 908.08 qt(US dry)/s
• 1 m = 3.28083 ft = 39.3701 in

### Example - pressure drop in a PEH pipe

Pressure drop in a PEH pipe with inside diameter 250 mm (0.25 m) and water flow 50 l/s (0.005 m3/s) can be estimated to be approximately 0.35 Pa/m (0.035 bar/100 m) as indicated in the diagram below. The flow velocity is approximately 1 m/s.

## Related Topics

• ### Fluid Flow and Pressure Loss in Pipes and Tubes

Fluid flow and pressure loss in pipe lines. Water and sewer systems. Steel pipes, pvc pipes, copper tubes and more.

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Friction loss (psi/100 ft) and velocity for water flow in plastic PVC pipe schedule 40.
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The Standard Dimension Ratio - SDR - is used to rate pressure pipes.
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Water flow and pressure loss in schedule 40 steel pipes - Imperial and SI units - gallons per minute, liters per second and cubic meters per hour.
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Free online tool for designing water supply systems in buildings.

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## Citation

• The Engineering ToolBox (2003). PE, PEH and PVC Pipes - Pressure Loss vs. Water Flow Diagram. [online] Available at: https://www.engineeringtoolbox.com/peh-pvc-pipes-pressure-drop-d_317.html [Accessed Day Month Year].

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7.8.15

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