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PVC Pipes Schedule 40 - Friction Loss vs. Water Flow Diagrams

Friction loss (psi/100 ft) and velocity for water flow in plastic PVC pipe schedule 40.

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Friction loss for water flow through plastic schedule 40 PVC pipe:

Plastic Schedule 40 PVC Pipe - Friction loss and Velocity Diagram

The calculation is based on the Hazen-Williams Equation with a Hazen-Williams coefficient c = 140.

Velocities between 7 to 10 feet per second are common. In general velocities above 5 feet per second should be avoided.

1 gal (US)/min =6.30888x10^-5 m³/s = 0.0227 m³/h = 0.06309 dm³(litre)/s = 2.228x10^-3 ft³/s = 0.1337 ft³/min
1 ft/s = 0.3048 m/s
1 psi (lb/in²) = 6,894.8 Pa (N/m²) = 6.895x10^-3 N/mm² = 6.895x10^-2 bar = 27.71 in H₂O at 62^oF (16.7^oC) = 703.1 mm H₂O at 62^oF (16.7^oC) = 2.0416 in mercury at 62^oF (16.7^oC) = 51.8 mm mercury at 62^oF (16.7^oC) = 703.6 kg/m² = 2.307 Ft. H₂O

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Related Topics

Fluid Flow and Pressure Loss - Pipe lines - fluid flow and pressure loss - water, sewer, steel pipes, pvc pipes, copper tubes and more
Water Systems - Hot and cold water service systems - design properties, capacities, sizing and more

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Engineering ToolBox, (2008). PVC Pipes Schedule 40 - Friction Loss vs. Water Flow Diagrams. [online] Available at: https://www.engineeringtoolbox.com/pvc-schedule-40-pipe-friction-loss-diagram-d_1147.html [Accessed Day Mo. Year].

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