8.13c Head loss in pipe diagram
Head loss in pipe diagram
The head loss in pipe diagram also apply for other Newtonian liquids having similar viscosity to that of water when the pressure loss is expressed as head (metres column of liquid).
Figure 8.13c Frictional loss diagram for water at +10°C.
Pipe type: steel, Cu, Etl, PE, PVC. k = 0.01 mm for diameter ≤ 200 mm and k = 0.05 mm for diameter > 200 mm.
For other k values see diagrams 8.13c – 8.13h, see table 8.12c >>> for what specific diagram that applies to your inquiry.
Example:
It is known that flow 10 l/s, pipe diameter = 120 mm and pipe length = 200 m. Calculate the flow velocity and the loss of head. From the diagram, the velocity is 0,9 m/s and loss of head (200 • 7/1000) = 1.4 m
Head loss is energy loss due to friction in pipes, fittings, valves, heat exchangers and other components connected to the piping system. The energy lost was originally added to the fluid by the pump, hydraulic energy.
he following formula applies to head losses for flow in a straight pipe using the Darcy Weisbach method:
hL = head loss (m)
λ = loss coefficient
l = length of pipe (m)
d = diameter of pipe (m)
v = flow velocity (m/s)
There is more information on how to calculate head loss in pipe at section 8.6 Head loss in straight pipe >>>