Hazen-Williams Flow through a Pressurized Pipe Equation

Written by Jerry Ratzlaff 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 formulas

\(\large{ p_d = \frac{4.52 \; Q^{1.852}} {C^{1.852} \; d^{4.8704}}  }\)  (US units) 
\(\large{ p_d = \frac{10.67 \; Q^{1.852}} {C^{1.852} \; d^{4.8704}}  }\) (SI units)


\(\large{ p_d }\) = pressure drop over the length of pipe

\(\large{ Q }\) = flow rate

\(\large{ C }\) = Hazen-Williams coefficient

\(\large{ d }\) = inside diameter of pipe


Tags: Equations for Pipe Sizing Equations for Flow Equations for Hazen-Williams