There are three common types of API flanges: API 2000,3000,5000 and there are two high pressure series, API 10,000 and 15,000. The number of the series indicated corresponds to the maximum working pressure expressed in psi at a temperature of l00ºF.
This maximum working pressure is affected by temperature�The maximum working pressure of the flange will be reduced by a factor of 1.8% for each 50ºF increase in temperature above 100ºF to a maximum of 450’F. The following table gives the maximum working pressure as a function of temperature.
This maximum working pressure is affected by temperature�The maximum working pressure of the flange will be reduced by a factor of 1.8% for each 50ºF increase in temperature above 100ºF to a maximum of 450’F. The following table gives the maximum working pressure as a function of temperature.
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