Hazen-Williams Pipe Inside Diameter

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.

 

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	\(in\)	\(mm\)
\( Q \) = Flow Rate	\(ft^3 \;/\; sec\)	\(m^3 \;/\; s\)
\( C \) = Hazen-Williams Coefficient	\(dimensionless\)	\(dimensionless\)
\( m \) = Hydraulic Grade Line Slope	\(ft\)	\(m\)