Hazen-Williams Flow through a Pressurized Pipe Equation

on 06 January 2019. 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	\(dimensionless\)	\(dimensionless\)
\( d \) = Pipe Inside Diameter	\(in\)	\(mm\)

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
\( p_d \) = Pessure Drop Over the Length of Pipe	\(lbf\;/\;in^2\)	\(Pa\)
\( Q \) = Flow Rate	\(ft^3\;/\;sec\)	\(m^3\;/\;s\)
\( C \) = Hazen-Williams Coefficient	\(dimensionless\)	\(dimensionless\)
\( d \) = Pipe Inside Diameter	\(in\)	\(mm\)