Hazen-Williams Pipe Inside Diameter Equation

This inside pipe diameter formula is used in Hazen-Williams equations and the coefficient formula.

 

Hazen-Williams Pipe Inside Diameter Equation formula

\(\large{ d = \left(   \frac {Q}{ 0.285 \; C \; m^{0.54} } \right)   ^{\frac {1}{2.63} }   }\)

Where:

Units	English	Metric
\(\large{ d }\) = inside diameter of pipe	\(\large{in}\)	\(\large{mm}\)
\(\large{ Q }\) = flow rate	\(\large{\frac{ft^3}{sec}}\)	\(\large{\frac{m^3}{s}}\)
\(\large{ C }\) = Hazen-Williams coefficient	\(\large{dimensionless}\)
\(\large{ m }\) = hydraulic grade line slope	\(\large{ft}\)	\(\large{m}\)