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