Property of a part variant. The pipe class specifies the range of application in relation to the pressure and temperature, meaning the maximum permissible pressure at which the piping may be operated at a maximum permissible temperature. When doing this, a pipe class contains a fixed number of pipe items, such as pipes, fittings, flanges, nuts, bolts, and gaskets.

Reference

PipingDefinitionPropertyList Class
PipingDefinitionPropertyList Members