Hazen-Williams Flow through a Pressurized Pipe Equation

on . Posted in Fluid Dynamics

The Hazen-Williams Equation can be used for flow through an open channel or through a pressurized pipe.

 

Hazen-Williams flow through a pressurized pipe Equation

\( p_d =  4.52 \; Q^{1.852} \;/\; C^{1.852} \; d^{4.8704}  \)     (US units) 
Symbol English Metric
\( p_d \) = pressure drop over the length of pipe \(lbf\;/\;in^2\) \(Pa\)
\( Q \) = flow rate \(ft^3\;/\;sec\) \(m^3\;/\;s\)
\( C \) = Hazen-Williams coefficient \(dimensionless\)
\( d \) = inside diameter of pipe \(in\) \(mm\)

  

Hazen-Williams flow through a pressurized pipe Equation

\( p_d =  10.67 \; Q^{1.852} \;/\; C^{1.852} \; d^{4.8704}  \)     (SI units)
Symbol English Metric
\( p_d \) = pressure drop over the length of pipe \(lbf\;/\;in^2\) \(Pa\)
\( Q \) = flow rate \(ft^3\;/\;sec\) \(m^3\;/\;s\)
\( C \) = Hazen-Williams coefficient \(dimensionless\)
\( d \) = inside diameter of pipe \(in\) \(mm\)

 

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Tags: Pipe Sizing Flow Hazen-Williams