1.1 本耐火试验响应试验方法涵盖了测量和观察塑料燃烧或分解产生的相对烟雾遮蔽量的实验室程序。它旨在用于测量塑料在受控燃烧或分解条件下的产烟特性。不暗示与其他火灾条件相关。测量是根据在受控标准化条件下产生的烟雾收集体积的透光损失进行的。该装置的构造使火焰和烟雾在试验过程中可以观察到。 2. 1.2 在燃烧过程中，会产生对人员有潜在危险的气体或蒸汽，或两者兼而有之。 应采取足够的预防措施保护操作员。 1.3 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.4 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。 1.5 防火测试本身就很危险。在进行这些测试时，应采取适当的人员和财产保护措施。 具体的安全警告声明见 1.2 和 9.13 . 1.6 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。 注1: 没有已知的ISO等效于本标准。 1.7 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 在本文规定的条件下对材料进行的试验在比较塑料的相对烟雾遮蔽特性方面具有相当大的价值。 5.2 本试验方法用于确定塑料材料在火焰存在下主动燃烧和分解的条件下可能吸烟的程度。 注2: 一项研究 5. 建议将本试验的视觉和仪器观察结果与塑料材料添加到自由燃烧的大型室外火灾中时产生的烟雾的视觉观察结果进行比较。 5.3 该测试程序的有用性在于其能够在规定条件下以简单、直接和有意义的方式测量产生的烟雾遮挡量。 众所周知，可燃物产生的烟雾对视觉的模糊程度受到材料数量和形式、湿度、通风、温度和氧气供应变化的影响。 5.4 安全注意事项- 燃烧产物有毒。应注意保护操作员免受燃烧产物的影响。

1.1 This fire-test-response test method covers a laboratory procedure for measuring and observing the relative amounts of smoke obscuration produced by the burning or decomposition of plastics. It is intended to be used for measuring the smoke-producing characteristics of plastics under controlled conditions of combustion or decomposition. Correlation with other fire conditions is not implied. The measurements are made in terms of the loss of light transmission through a collected volume of smoke produced under controlled, standardized conditions. The apparatus is constructed so that the flame and smoke is observable during the test. 2 1.2 During the course of combustion, gases or vapors, or both, are evolved that are potentially hazardous to personnel. Adequate precautions shall be taken to protect the operator. 1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information purposes only. 1.4 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. 1.5 Fire testing is inherently hazardous. Adequate safeguards for personnel and property shall be employed in conducting these tests. Specific safety warning statements are given in 1.2 and 9.13 . 1.6 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. Note 1: There is no known ISO equivalent to this standard. 1.7 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 Tests made on a material under conditions herein prescribed are of considerable value in comparing the relative smoke obscuration characteristics of plastics. 5.2 This test method serves to determine the extent to which plastic materials are likely to smoke under conditions of active burning and decomposition in the presence of flame. Note 2: One study 5 suggested that visual and instrumental observations from this test compare well with the visual observations of the smoke generated by plastic materials when added to a freely burning large outdoor fire. 5.3 The usefulness of this test procedure is in its ability to measure the amount of smoke obscuration produced in a simple, direct, and meaningful manner under the specified conditions. The degree of obscuration of vision by smoke generated by combustibles is known to be affected by changes in quantity and form of material, humidity, draft, temperature, and oxygen supply. 5.4 Safety Precautions— Products of combustion are toxic. Care shall be taken to guard the operator from the effects of products of combustion.