Temperature Rating for Common Tubing Materials

NOTE: The pressure rating of a tube is negatively affected by maximum operating temperature and severity of service. Temperature Derating Factor table and Severity of Service Derating Factors table are included below.


Temperature Ranges for Common Tubing Materials

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Temperature Derating Factors

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Severity of Service Derating Factors

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EXAMPLE - USING DERATING FACTORS TO ARRIVE AT MAXIMUM WORKING PRESSURE:

Consider the following scenario:

  • Fully annealed SS316 tubing, OD = 1.500", Wall thickness = 0.065"
  • Used at maximum temperature of 600F
  • Used in an application with severe hydraulic shocks

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.

 

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