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

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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Dimensions of PE pipes according EN 12201.

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Polyethylene pipe dimensions according European Standards.

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The Standard Dimension Ratio - SDR - is used to rate pressure pipes.

Static pressure vs. pressure head in fluids.

### Steel Pipes Schedule 40 - Pressure Loss

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.

### Water Supply Systems - Online Design Application

Free online tool for designing water supply systems in buildings.

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