#force main

Force mains are pipelines that convey wastewater under pressure from the discharge side of a pump or pneumatic ejector to a discharge point. Pumps or compressors located in a lift station provide the energy for wastewater conveyance in force mains.

A force main is part of many industrial and commercial sewer systems. It’s a pressurized line that moves wastewater along when a standard gravity line will not work because the sewage would have to travel against gravity (such as up a hill).

The PR must meet or exceed the cyclic pressures routinely generated during the force main’s operation. Second,non-cyclic peak pressures are compared against the STR. The STR must meet or exceed these occasional peak pressures generated by “infrequent” surge. Finally, the cyclic capability of the PVC, as represented by the value C, must meet or exceed the number of cycles expected, C’, during the design life of the force main.

A force main is part of many industrial and commercial sewer systems. It’s a pressurized line that moves wastewater along when a standard gravity line will not work because the sewage would have to travel against gravity (such as up a hill).

https://www.uni-bell.org/Resources/Documents/3/force-mains/engineering-design