Pressure temperature rating according to ASME B16.5

The maximum allowable operating pressure for valves and flanges drops with rising temperature (within allowable limits). For ASME flanges, these ratings are defined in the industrial standard ASME B16.5. This standard lists the maximum allowable operating pressure for specific materials at specific temperatures and nominal pressure ratings.

The standard defines the operating range with regards to pressure and temperature, as well as their interdependence (p,T-rating). This information includes a maximum allowable pressure (PS) up to which the devices can be used at a certain allowable temperature (TS).

Our tool provides a convenient way to quickly check the pressure compatibility of your valve at your specific operating temperature.

Please be aware that these values are general recommended ratings based on the flange standard. The actual values for operating pressure and temperature can deviate, depending on the specific valve or device in question!