1.1 本规范规定了为可能偶然暴露于明火、辐射热源或可能熔化或点燃材料的热表面的应用提供耐热、阻燃和耐熔化性的防护服贴标签的最低要求。 1.1.1 本规范的可能应用示例包括安全服装，包括在可能意外接触热表面、辐射热源或明火的情况下的高可见度安全服装；个人穿着的用于化学、液体或颗粒防护的衣服，其中衣服可能类似地接触燃烧器或类似的低强度火源；或与火炬火焰、热管道或其他通过接近或接触熔化、降解或点燃衣物材料的表面接触的个人所穿的其他衣物。 1.1.2 本规范不适用于对阻燃（“FR”）、耐热性或热能转移保护的单独索赔。相反，要求对服装材料进行阻燃性和耐热性测试的组合评估。 1.1.3 本规范不包括针对特定危险建立防护等级的测试，其中需要衣物绝缘，例如来自闪火、暴露于高能电弧或长时间火灾的防护等级。本规范不取代现有标准，也不应代替现有标准，其中制定了明确的标准，以保护工人免受已知特征的强烈热危害，如闪火（NFPA 2112）、高能电弧（规范 F1506 )或荒地消防（NFPA 1977）。看见 附录X1 有关耐热和阻燃防护服的标准列表。 1.1.4 本规范包括定义个人防护服中所用材料的抗熔化和燃烧性的要求，以限制衣服在暴露于低热或火焰时对佩戴者造成伤害的贡献。服装引起伤害的主要机制是服装点燃和助燃，以及服装是否融化到穿着者的皮肤上。 1.1.5 本规范适用于防护服结构中使用的所有材料，包括衬里材料和接触佩戴者皮肤或内衣的材料。一些材料（如标签和小部件）不接触佩戴者的皮肤或内衣，允许排除在外。 1.1.6 本规范不包括评估整个服装项目的测试。 1.1.7 本规范不包括手套或鞋的测试程序。 1.1.8 本规范适用于主要佩戴在个人头上的连帽、巴拉克拉瓦、罩衣、颈罩、障碍面罩和其他衣物。 1.2 本规范不适用于其他标准中针对特定应用（包括电弧闪光、闪火和各种类型的消防或应急响应）所述的防护服。看见 附录X1 有关耐热和阻燃防护服的标准列表。 1.3 以国际单位制或其他单位表示的数值应单独视为标准。每个系统中规定的值必须独立于其他系统使用，不得以任何方式组合值。 1.4 本标准测量并描述了材料、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 以下预防性警告仅适用于试验方法部分第节 8. ，本规范: 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。 1.6 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。

1.1 This specification provides minimum requirements for labeling protective clothing offering heat, flame, and melting resistance for applications where the potential exists for incidental exposure to open flame, radiant heat sources, or hot surfaces which could melt or ignite materials. 1.1.1 Examples of possible applications for this specification include safety apparel, including high-visibility safety apparel, in situations where the possibility exists for accidental contact with hot surfaces, radiant heat sources, or an open flame; clothing worn by individuals for chemical, liquid, or particle protection where the possibility exists for clothing to similarly contact a burner or similar low-intensity flame source; or other clothing worn by individuals that comes in contact with torch flames, hot piping, or other surfaces that melt, degrade, or ignite clothing materials by proximity or contact. 1.1.2 This specification is not to be used for separate claims for flame resistance (“FR”), heat resistance, or protection against the transfer of thermal energy. Instead, clothing materials are required to be evaluated for the combination of flame and heat resistance tests. 1.1.3 This specification does not include a test for establishing protection levels against specific hazards where clothing insulation is needed such as from flash fires, exposure to high-energy electrical arc, or extended duration fires. This specification does not replace and shall not be used in lieu of existing standards where well-defined criteria are established for protection of workers from known characterized intense thermal hazards such as flash fires (NFPA 2112), high-energy electrical arc (Specification F1506 ), or wildland firefighting (NFPA 1977). See Appendix X1 for a list of standards for heat and flame-resistant protective clothing. 1.1.4 This specification includes requirements that define resistance to melting and combustion of materials used in personal protective clothing in a manner to limit the contribution of the clothing for causing injury to the wearer when exposed to low levels of heat or flame. The primary mechanisms by which a garment can contribute to injury are by the garment igniting and supporting combustion, and if the garment melts onto the wearer’s skin. 1.1.5 This specification is applicable to all materials used in the construction of the protective clothing, including lining materials and materials that contact the skin or underclothing of the wearer. Exclusions are permitted for some materials such as labels and small components that do not come in contact with the wearer’s skin or underclothing. 1.1.6 This specification does not include testing for the evaluation of the entire clothing item. 1.1.7 This specification does not include procedures for testing of gloves or footwear. 1.1.8 This specification is applicable to hoods, balaclavas, shrouds, neck gaiters, barrier face coverings, and other items of apparel that are primarily worn on the individual wearer’s head. 1.2 This specification does not apply to protective clothing that is addressed in other standards for specific applications including electrical arc flash, flash fire, and various types of firefighting or emergency response. See Appendix X1 for a list of standards for heat and flame-resistant protective clothing. 1.3 The values stated in SI units or in other units shall be regarded separately as standard. The values stated in each system must be used independently of the other, without combining values in any way. 1.4 This standard measures and describes 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 The following precautionary caveat pertains only to the test methods portion, Section 8 , of this specification: 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. 1.6 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.