If it's a discharge pipe, i.e. outlet of a pumping station, trunk main, etc., it's a matter of optimum: take a range of 2-3 diameters and use Q=V x A. Minimum velocity should not be lower than 2m/s.
Published by Radu Stefan Rautu
If it's a discharge pipe, i.e. outlet of a pumping station, trunk main, etc., it's a matter of optimum: take a range of 2-3 diameters and use Q=V x A. Minimum velocity should not be lower than 2m/s.