Hazen-Williams Head Loss due to Friction Formulas |
||
|
h_f \;=\; \dfrac{ 4.73 \cdot l_p \cdot \left( \dfrac{Q}{C} \right)^{1.852} }{ d^{4.87} } (US units) h_f \;=\; \left( 4.73 \cdot \left( \dfrac{Q}{C} \right)^{1.852} \right) \cdot \dfrac{l_p}{d^{4.87} } (US units) h_f \;=\; \left( 10.7 \cdot \left( \dfrac{Q}{C} \right)^{1.852} \right) \cdot \dfrac{l_p}{d^{4.87} } (SI units) |
||
| Symbol | English | Metric |
| h_f = Head Loss due to Friction | ft | m |
| Q = Flow Rate | ft^3\;/\;sec | m^3\;/\;s |
| C = Hazen-Williams Coefficient | dimensionless | dimensionless |
| l_p = Pipe Length | ft | m |
| d = Inside Diameter of Pipe | in | mm |
This head loss due to friction formula is used in Hazen-Williams equations.
