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The calculators below can used to calculate the specific head loss (head loss per 1 00 ft (m) pipe) and the actual head loss for the actual length of pipe. Default values are from the example above.
The Hazen-Williams equation is not the only empirical formula available. Manning's formula is commonly used to calculate gravity driven flows in open channels.
The flow velocity can be calculated as
v = 0.408709 q / d 2 (2)
v = flow velocity (ft/s)
The Hazen-Williams equation is assumed to be relatively accurate for water flow in piping systems when
For hotter water with lower kinematic viscosity (example 0.55 cSt at 130 o F (54.4 o C)) the error will be significant.
Since the Hazen-Williams method is only valid for water flow - the Darcy Weisbach method should be used for other liquids or gases.
Pipe lines - fluid flow and pressure loss - water, sewer, steel pipes, pvc pipes, copper tubes and more.
The study of fluids - liquids and gases. Involving velocity, pressure, density and temperature as functions of space and time.
Water flow and pressure loss (psi/ft) due to friction in copper tubes ASTM B88 Types K, L and M.
The Darcy-Weisbach equation can be used to calculate the major pressure and head loss due to friction in ducts, pipes or tubes.
Calculate minor pressure loss in piping systems with the Equivalent Pipe Length Method.
Hazen-Williams friction loss coefficients for commonly used piping materials.
Friction head loss (ft/100 ft) vs. water flow in steel, copper and PVC plastic pipes.
The Hazen-Williams equation can be used to calculate the pressure drop (psi) or friction loss in pipes or tubes.
Equivalent length of fittings like bends, returns, tees and valves in hot water heating systems - equivalent length in feet and meter.
Pressure drop diagrams for PTFE, PP, PFA and PVDF lined pipes.
Calculate cross-sectional average velocity flow in open channels.
Calculate cross-sectional areas, weight of empty pipes, weight of pipes filled with water, inside and outside surface areas.
Friction head loss (ft/100 ft) vs. water flow in plastic pipes like PVC, PP, PE or PEH.
Calculate pressure loss in pipes connected in series or parallel.
Minor loss in PVC and CPVC fittings expressed as equivalent length of straight pipe.
Water flow in thermoplastic PVC and CPVC pipes Schedule 40 - friction loss (ft/100 ft, psi/100 ft) and flow velocities at dimensions ranging 1/2 to 16 inches.
Friction loss (psi/100 ft) and velocity for water flow in plastic PVC pipe schedule 40.
Maximum water flow capacities in steel pipes - pipe dimensions ranging 2 - 24 inches.
Friction loss and velocity diagrams - in imperial (psi/100 ft, ft/s) and SI (Pa/100m, m/s) units.
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 flow in steel pipes schedule 80 - pressure drop and velocity diagrams in SI and Imperial units.
Materials used in water distribution pipes.
Reynolds number for clean cold water flow.
Free online tool for designing water supply systems in buildings.
Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!
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