四分之一回转阀门及带有非金属阀座阀门的火灾测试

[中文适用范围]： 本标准规定了用于确认具有非金属或金属阀座的四分之一回转阀门以及其他带有非金属阀座的阀门在火灾测试期间和之后的压力保持能力的火灾测试要求和方法。它不包括阀门执行机构的测试要求，除非这些执行机构是手动操作的齿轮箱或类似机构，这些机构构成阀门正常装配的一部分。其他类型的阀门执行机构（如电动、气动或液压）可能需要特殊保护才能在阀门测试环境中操作，这些执行机构的火灾测试不在本标准范围内。 [外文原描述]： This International Standard specifies fire type-testing requirements and a fire type-test method for confirming the pressure-containing capability of a valve under pressure during and after the fire test. It does not cover the testing requirements for valve actuators other than manually operated gear boxes or similar mechanisms when these form part of the normal valve assembly. Other types of valve actuators (e.g. electrical, pneumatic, or hydraulic) may need special protection to operate in the environment considered in this valve test, and the fire testing of such actuators is outside the scope of this standard.