In India design manual ...

Published by

In India design manual recommends maximum velocity for liquid flow  at 3.0 m/sec. The same for gas flow is between 15 to 20 m/sec. One has to carefully select the velocity considering the Suspended solids in the water stream. If solids are present like in wastewater, it can cause erosion in metal and plastic pipe even at low velocity. Besides erosion pressure drop is also required to be considered. At higher velocity more energy will be required to pump the fluid. Thus a balance is required to be worked out between pipe size and pumping energy requirement