Pipe Friction Loss Calculator

Calculate head loss due to pipe friction using the Hazen-Williams equation for water supply systems.

GPM
in
ft

Total Head Loss

0.00 ft

Head Loss per 100 ft0.00 ft/100ft
Pressure Loss0.00 psi

Total Head Loss vs Flow Rate

सूत्र देखें →

सूत्र

## Hazen-Williams Formula **h_f = 10.67 x (Q / C)^1.852 / D^4.8655 x L** This empirical formula is widely used for water distribution systems. C is the roughness coefficient (150 for new PVC, 130 for copper, 100 for old steel). Results are in feet of head; multiply by 0.4333 for psi.

हल किया गया उदाहरण

15 GPM through 1-inch copper (C=130) for 100 feet.

  1. 01h_f/100ft = 10.67 x (15/130)^1.852 / (1/12)^4.8655
  2. 02Compute numerator and denominator using the formula
  3. 03Total head loss for 100 ft is approximately 12.5 ft
  4. 04Pressure loss = 12.5 x 0.4333 = 5.42 psi