scope:

1.1 Scope

1.1.1 This standard covers the requirements for testing and evaluating the performance of straightway, soft-seated quarter-turn valves when they are exposed to certain fire conditions defined in this standard. The procedures described in this standard apply to all classes and sizes of such valves that are made of materials listed in ASME B16.34.

Note: Throughout this standard the term class (either capitalized or not) means pressure class as defined in ASME B16.34.

1.1.2 The performance requirements presented in this document establish standard limits of acceptability.

Note: The maximum acceptable leakage rates given in this standard are for the test temperatures and pressures specified. Leakage rates of valves in service during and after an actual fire may be substantially different.