1.1 这是火灾测试响应标准。 1.2 本耐火试验方法适用于电线或电缆中包含的电气绝缘材料。 1.3 点火源是以甲烷或天然气为燃料的气体燃烧器。 1.4 在裁判决定中使用国际单位制规定的数值；见IEEE/ASTM SI-10。国际单位制后括号中给出的值仅供参考，不被视为标准值。 1.5 本标准用于测量和描述材料、产品或组件在受控条件下对热量和火焰的响应，但其本身并不包括在实际火灾条件下对材料、产品或组件进行火灾危险或火灾风险评估所需的所有因素。 1.6 火灾测试本身就很危险。在进行这些测试时，应采取适当的人员和财产保护措施。 1.7 本标准并非旨在解决与其使用相关的所有安全问题（如有）。 本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.8 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 该水平火焰测试方法测量材料在移除所用火源时停止燃烧的能力。 5.2 该试验方法还提供了材料通过滴下燃烧颗粒传播火焰的能力的测量方法。 5.3 本试验方法用于评估试验方法中电气绝缘材料的水平火焰试验性能 D470 . 5. 4. 在本试验方法中，将试样置于一组或多组特定的实验室试验条件下。如果替换了不同的试验条件或改变了最终使用条件，则通过本试验或从本试验中预测测得的耐火试验响应特性的变化并不总是可能的。因此，结果仅适用于本试验方法中描述的火灾试验暴露条件。

1.1 This is a fire-test-response standard. 1.2 This fire test method is applicable to the electrical insulation materials contained in wires or cables. 1.3 The ignition source is a gas burner fueled by methane or natural gas. 1.4 Use the values stated in SI units in referee decisions; see IEEE/ASTM SI-10. The values given in parentheses after SI units are provided for information only and are not considered standard. 1.5 This standard is used to measure and describe the response of materials, products, or assemblies to heat and flame under controlled conditions, but does not by itself incorporate all factors required for fire hazard or fire risk assessment of the materials, products, or assemblies under actual fire conditions. 1.6 Fire testing is inherently hazardous. Adequate safeguards for personnel and property shall be employed in conducting these tests. 1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 This horizontal flame test method measures the ability of the material to cease flaming when the source of ignition used is removed. 5.2 This test method also provides a measure of the capability of the material to spread flame by dripping of flaming particles. 5.3 This test method is used to assess the horizontal flame test performance of electrical insulation materials in Test Methods D470 . 5.4 In this test method, the test specimens are subjected to one or more specific sets of laboratory test conditions. If different test conditions are substituted or the end-use conditions are changed, it is not always possible by or from this test to predict changes in the fire-test-response characteristics measured. The results are therefore valid only for the fire-test-exposure conditions described in this test method.