Hi Mohd, we generally use the ...
Published by Ian Pearson
Hi Mohd, we generally use the Darcy Wiesbach formula for pipe flow where your inputs are pipe diameter, flow rate, pipe roughness (depending on type of material) . You choose different pipe diameters and generate different flow velocities and friction losses. You then select the optimum pipe size that will give you a lowish friction loss and a flow velocity that is acceptable (say between 1 and 4 m/s max). Attached is a simple nomogram for HDPE pipeflow based on this equation.
1 Comment
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