This calculator was developed based on recent research performed by Utah State University. The user is encouraged to reference the PVC Force Main Design Guide for more information on cyclic design of PVC pipe. Users are able to determine cyclic life of PVC pressure pipe from recurring surge pressure events. Designers are responsible for the proper use of this program for all projects. For an in-depth guide on using this calculator, reference the How-To Guide.
N = Number of cycles (surge occurrences) to failure
n = Cycles (surge occurrences) per year
σamp = Stress amplitude in pipe from cyclic pressures