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Pipe Exit Loss Equation

The exit loss, ho, is a function of the change in velocity at the outlet of the pipe as shown in Equation A.

Equation A.


  • v = average outlet velocity (fps or m/s)
  • vd = channel velocity downstream of the outlet (fps or m/s)
  • Co = exit loss coefficient (0.5 typical).

The above assumes that the channel velocity is lower than the outlet velocity

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