1.1 本规范涵盖了供暖和空调（HVAC）系统中使用的乙二醇、丙二醇、1,3丙二醇以及甘油基传热流体（HTF）的要求。当浓缩液最高使用65 % 在水中或当预稀释的传热流体（30）时的重量浓度 % 按最小重量计）在没有进一步稀释的情况下使用，它们将有效地起到防冻和防腐的作用。 1.2 本规范中描述的流体不适用于使用内燃机（汽油、柴油或CNG/LPG）的系统。 1.3 本规范规定的传热流体按所用防冻剂的主要基础分类如下: 热传递 流体类型 描述 我 乙二醇 二、 丙二醇 三、 1,3-丙二醇 四、 甘油 1.4 应测试符合本规范的传热流体，并完全符合 表1 。 注1: 本规范基于对由新成分或原始成分制备的传热流体性能的了解。本规范还应适用于使用回收或再加工成分产生的材料制备的传热流体，前提是这些成分符合规范的要求 E1177 和 D7388 乙醇和规格 D7640 甘油。 注2: 本规范涉及将与水混合用于各种气候的浓缩抑制二醇和甘油，以及工厂生产的预稀释传热流体（HTF）- 与纯净水混合。中提供了适当稀释度下的估计防冻温度表 附录X1 。 1.5 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。 1.6 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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。 1.7 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《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。

1.1 This specification covers the requirements for ethylene glycol, propylene glycol, 1,3 propanediol as well as glycerin base heat transfer fluids (HTF) used in heating and air conditioning (HVAC) systems. When concentrates are used at up to 65 % concentration by weight in water, or when prediluted heat transfer fluids (30 % by weight minimum) are used without further dilution, they will function effectively to provide protection against freezing, and corrosion. 1.2 The fluids described in this specification are not appropriate for use in systems where internal combustion engines (gasoline, diesel, or CNG/LPG) are used. 1.3 The heat transfer fluids governed by this specification are categorized as follows by the primary base of freeze depressant used: Heat Transfer Fluid Type Description I Ethylene glycol II Propylene glycol III 1,3-Propanediol IV Glycerin 1.4 Heat transfer fluids meeting this specification shall be tested and fully comply with requirements listed in Table 1 . Note 1: This specification is based on the knowledge of the performance of heat transfer fluids prepared from new or virgin ingredients. This specification shall also apply to heat transfer fluids prepared using materials generated from recycled or reprocessed ingredients, provided that these ingredients meet the requirements of Specifications E1177 and D7388 for Glycols and Specification D7640 for Glycerin. Note 2: This specification addresses concentrated inhibited glycols and glycerol that will be mixed with water for use in various climates and prediluted heat transfer fluids (HTF) that are factory-blended with purified water. A table of estimated freeze protection temperatures at appropriate dilutions is provided in Appendix X1 . 1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 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. 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.