1.1 该火灾测试响应标准规定了在有或没有外部点火器的情况下，测量暴露于受控水平辐射加热的材料的响应。 1.2 本试验方法用于测定材料和产品的可燃性、放热率、质量损失率、有效燃烧热和可见烟雾发展。 1.3 通过测量氧消耗来确定放热速率，所述氧消耗由排气产物流中的氧浓度和流速确定。有效燃烧热由样品质量损失率的伴随测量结合热释放率确定。通过燃烧产物流对光的遮蔽来测量烟雾产生。 1.4 试样应暴露于0 kW/m范围内的初始试验热通量 2 至100 kW/m 2 .使用外部点火时，应以电火花点火。初始试验热通量的值和外部点火的使用应按照相关材料或性能标准的规定（见 X1.2 ).正常样品测试方向是水平的，与最终用途应用是水平方向还是垂直方向无关。该设备还包含用于垂直定向测试的装置；这仅用于探索性或诊断性研究。 1.5 可燃性被确定为从初始暴露到持续燃烧时间的时间的测量值。 1.6 该测试方法已开发用于材料和产品评估、数学建模、设计目的或开发和研究。材料样品的例子包括端部的部分-使用产品或最终用途产品中使用的各种组件。 1.7 单位- 以SI单位表示的值将被视为标准值。本标准不包括其他计量单位。 1.8 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。 1.9 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。有关具体危害陈述，请参见章节 7 . 1.10 火灾测试本质上是危险的。在进行这些试验时，应对人员和财产采取充分的安全措施。 1.11 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》中确立的国际公认的标准化原则制定的。 ======意义和用途====== 5.1 该测试方法主要用于确定涉及测试材料产品的火灾中产生的热量或导致的热量。还包括有效燃烧热、质量损失率、持续燃烧时间和烟雾产生的测定。这些特性是在代表预期最终用途的小尺寸样本上测定的。 5.2 该测试方法适用于各种类别的产品，不限于代表单一火灾场景。有关测试的其他指导见 X1.2.3 和 X1.11 . 5.3 本试验方法不适用于不具有平面或接近平面外表面的最终用途产品。 附注1: 所有尺寸均以毫米为单位。 附注2: *表示临界尺寸。

1.1 This fire-test-response standard provides for measuring the response of materials exposed to controlled levels of radiant heating with or without an external ignitor. 1.2 This test method is used to determine the ignitability, heat release rates, mass loss rates, effective heat of combustion, and visible smoke development of materials and products. 1.3 The rate of heat release is determined by measurement of the oxygen consumption as determined by the oxygen concentration and the flow rate in the exhaust product stream. The effective heat of combustion is determined from a concomitant measurement of specimen mass loss rate, in combination with the heat release rate. Smoke development is measured by obscuration of light by the combustion product stream. 1.4 Specimens shall be exposed to initial test heat fluxes in the range of 0 kW/m 2 to 100 kW/m 2 . External ignition, when used, shall be by electric spark. The value of the initial test heat flux and the use of external ignition are to be as specified in the relevant material or performance standard (see X1.2 ). The normal specimen testing orientation is horizontal, independent of whether the end-use application involves a horizontal or a vertical orientation. The apparatus also contains provisions for vertical orientation testing; this is used for exploratory or diagnostic studies only. 1.5 Ignitability is determined as a measurement of time from initial exposure to time of sustained flaming. 1.6 This test method has been developed for use for material and product evaluations, mathematical modeling, design purposes, or development and research. Examples of material specimens include portions of an end-use product or the various components used in the end-use product. 1.7 Units— The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.8 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. 1.9 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. For specific hazard statements, see Section 7 . 1.10 Fire testing is inherently hazardous. Adequate safeguards for personnel and property shall be employed in conducting these tests. 1.11 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 test method is used primarily to determine the heat evolved in, or contributed to, a fire involving products of the test material. Also included is a determination of the effective heat of combustion, mass loss rate, the time to sustained flaming, and smoke production. These properties are determined on small size specimens that are representative of those in the intended end use. 5.2 This test method is applicable to various categories of products and is not limited to representing a single fire scenario. Additional guidance for testing is given in X1.2.3 and X1.11 . 5.3 This test method is not applicable to end-use products that do not have planar, or nearly planar, external surfaces. Note 1: All dimensions are in millimetres. Note 2: * Indicates a critical dimension.