本文件规定了带有一个或多个密封件的软阀座和金属阀座隔离阀的防火试验要求和防火试验方法。当手动变速箱或类似机构构成正常阀门组件的一部分时，不适用于阀门执行机构的测试要求。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本阀门测试中考虑的环境中运行，且此类执行机构的防火测试不在本文件的范围内。 本文件规定了以下方面的测量和评估标准: a） 通过阀座泄漏； b） 外部泄漏； c） 双座阀的空腔过压释放； d） 可操作性。 本文件规定了可将阀门的防火试验资格扩展至未经试验的尺寸、压力等级和相同基本设计类型的结构材料的规则。 根据本文件先前版本进行测试的阀门的防火测试报告，如果与根据本文件测试版本6.7提交的完整且符合要求的消防测试报告一起提交，则可以接受。买方可自行决定是否接受或拒绝火灾试验报告中第6.7节要求的任何缺失数据。 注意在本文件中，术语“火灾类型试验”和“火灾试验”是同义词。

This document specifies fire type-testing requirements and a fire type-test method for soft- and metal-seated isolation valves with one or more obturators. It is not applicable to the testing requirements for valve actuators other than manually operated gearboxes or similar mechanisms when these form part of the normal valve assembly. Other types of valve actuators (e.g. electrical, pneumatic or hydraulic) can 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 document. This document specifies the measurement and assessment criteria for: a) through-seat leakage; b) external leakage; c) cavity overpressure relief of double-seated valves; d) operability. This document specifies the rules whereby the fire-type testing qualification for a valve can be extended to untested sizes, pressure ratings and materials of construction of the same basic design type. Fire test reports of valves tested according to previous editions of this document are acceptable when submitted together with the full and compliant fire test report as per 6.7 of the edition under which it was tested. Any data missing as required from 6.7 within the fire test report are accepted or rejected at the purchaser’s discretion. NOTE？For the purposes of this document, the terms “fire type-test” and “fire test” are synonymous.