Hazen-Williams Head Loss due to Friction Equation
This head loss due to friction formula is used in Hazen-Williams equations.
Hazen-Williams Head Loss due to Friction Equation formulas |
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\(\large{ h_f = \frac { 4.73\; l_p \; \left( \frac {Q}{C} \right) ^{1.852} }{d^{4.87} } }\) (US units) \(\large{ h_f = 4.73 \left( \frac {Q}{C} \right) ^{1.852} \frac{l_p}{d^{4.87}} }\) (US units) \(\large{ h_f = 10.7 \left( \frac {Q}{C} \right) ^{1.852} \frac{l_p}{d^{4.87}} }\) (SI units) |
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| Symbol | English | Metric |
| \(\large{ h_f }\) = head loss due to friction | \(\large{ft}\) | \(\large{m}\) |
| \(\large{ Q }\) = flow rate | \(\large{\frac{ft^3}{sec}}\) | \(\large{\frac{m^3}{s}}\) |
| \(\large{ C }\) = Hazen-Williams coefficient | \(\large{dimensionless}\) | |
| \(\large{ d }\) = inside diameter of pipe | \(\large{in}\) | \(\large{mm}\) |
| \(\large{ l_p }\) = lenght of pipe | \(\large{ft}\) | \(\large{m}\) |
Tags: Pipe Sizing Equations Head Equations Hazen-Williams Equations