Pipe pressure drop
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After calculating the pipe diameter using flow velocity, is it necessary to determine the pressure drop?
In hydraulic calculations, determining the pipe diameter based on the economic flow velocity is just the first step; it is also necessary to calculate the actual flow velocity from the selected pipe diameter, and then use this actual flow velocity to determine the Reynolds number and friction coefficient in order to compute the pipe pressure loss. Only then is a complete calculation process achieved. For specific procedures, see HGT 20570.7~.8