Skip to main content

Hazen-Williams Pipe Inside Diameter

 

Hazen-Williams Pipe Inside Diameter Formula

\( d  \;=\;  \left( \dfrac{ Q }{ C \cdot 0.285  \cdot m^{0.54} } \right)^{1/2.63}  \)     (Hazen-Williams Pipe Inside Diameter)

\( Q \;=\;  C \cdot 0.285  \cdot d^{2.63}  \cdot m^{0.54}   \)

\( C \;=\;  \dfrac{ Q }{ 0.285 \cdot d^{2.63}  \cdot m^{0.54}  } \)

\( m  \;=\;   \left( \dfrac{ Q }{  C \cdot 0.285  \cdot d^{2.63} } \right)^{1/0.54} \)

Symbol English Metric
\( d \) = Pipe Inside Diameter \(in\) -
\( Q \) = Flow Rate \(ft^3 \;/\; sec\) -
\( C \) = Hazen-Williams Coefficient \(dimensionless\) -
\( m \) = Hydraulic Grade Line Slope \(ft\) -

Hazen-Williams coefficient uses the pipe inside diameter as one of its parameters for calculating the flow rate of water through the pipe. The inside diameter is a crucial factor in determining the hydraulic characteristics of the pipe.

It's worth noting that the Hazen-Williams coefficient is an empirical formula and is primarily applicable to water flow in municipal water supply systems.  While it's a convenient and widely used method, especially for its simplicity, more advanced hydraulic models may be used for applications where higher accuracy is required or for non-standard conditions.

P D Logo 1