NOTE: The pressure rating of a tube is negatively affected by maximum operating temperature and severity of service. Consult the Temperature Derating Factor table and Severity of Service Derating Factors table below.
EXAMPLE - USING DERATING FACTORS TO ARRIVE AT MAXIMUM WORKING PRESSURE:
Consider the following scenario:
The pressure rating for the fully annealed SS316 tubing, OD = 1.500" and Wall thickness = 0.065" is 1,500 psi. (See the inch tube pressure rating table on this page). The temperature derating factor and severity of service derating factors are 0.81 and 0.67, respectively. The maximum design pressure = 1,500 x 0.81 x 0.67 = 814 psi.