Force Main Guide Discussion of Design
Increasing the cyclic life of PVC force mains is essential for ensuring an economical and durable design. Various strategies can be employed by engineers in the design process to enhance cyclic life: Adjust Pressure Class/Pressure Rating: Engineers can opt for a lower Dimension Ratio (DR), which increases the pressure class or pressure rating. Updating maximum and minimum pressure values (Prs(max) and Prs(min)) based on the Joukowsky Equation or transient analysis is crucial in this approach. Optimize Pump Cycles: Reducing the number of pump cycles in lift-station or wet-well design contributes to extending the cyclic life of PVC force mains. Implement Surge-Control Equipment: Minimizing surge-pressure amplitude can be achieved by introducing surge-control equipment. Detailed information on surge-control techniques is available for a more comprehensive understanding. If thicker-walled pipes, such as DR 21, 18, 14, are utilized, the resulting cyclic life may be overly conservative...