This chart shows the pressure-temperature ratings for flanges of Group 2.3 Materials from class 150 to class 2500. Hover on the nodes to see the values of pressure in bar at specific temperature.

Group 2.3 includes the following materials:

  • Forgings: A 182 Gr. F316L, A 182 Gr. F317L, A 182 Gr. F304L
  • Plates: A 240 Gr. 316L, A 240 Gr. 304L

Austenitic stainless steel Grade 304L shall not be used at temperatures over 425°C.

Allowable Working Pressure for Intermediate Temperatures

Interpolate the pressure for any rating by selecting pressure rating for group 2.3 material and entering value of temperature into the input box below.

Select Class:
Enter Temperature:
Working Pressure in bar:
Working Pressure in psi:

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The chart provided here is for guidance to illustrate how the working pressure and temperature vary for flanges in different class ratings for group 2.3 materials. This information shall not be used for design. Use the current version of ASME B16.5 code for actual design of the piping system.