# Head Loss

Head loss, abbreviated as \(h_l\), is a pressure loss due to the resistance of the fluid and obstructions along the way in a pipe. There are a number of factors that affect head loss such as:

- flow rate
- corrosion and scale deposits
- fittings
- inside diameter of the pipe
- roughness of the pipe wall
- viscosity of the liquid
- length of the pipe
- straightness of the pipe

### solve with Loss Coefficient Formula

\(\large{ h_l = K \frac { v^2 } { 2 \; g } }\)

Where:

\(\large{ h_l }\) = head loss

\(\large{ v }\) = flow velocity

\(\large{ g }\) = gravitational acceleration

\(\large{ K }\) = loss coefficient