Additional CET for Piping:
The CET for systems constructed to the ASME B31.3 Piping Code is defined as the lowest metal temperature at which a component will be subject to either 30 percent of the MAWP at ambient temperature or a combined total longitudinal stress due to pressure, weight effects and displacement strains which does not exceed 55.2 MPa (8 ksi). The CET for piping is determined from the anticipated process and atmospheric conditions.