1.1 本规范涵盖了用于供暖和空调（HVAC）系统的乙二醇、丙二醇、1,3丙二醇以及甘油基传热液（HTF）的要求。当精矿使用温度高达65 % 水或预稀释传热流体时的重量浓度（30 % 按重量计算）在不进一步稀释的情况下使用，它们将有效地提供防冻和防腐保护。 1.2 本规范中描述的液体不适用于使用内燃机（汽油、柴油或CNG/LPG）的系统。 1.3 根据所用防冻剂的主要基础，本规范规定的传热流体分类如下: 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 . （A） 为了确定与本规范的一致性，应根据实践中的舍入方法，将观察值舍入到用于表示规范极限的最后一个右手数字中的“最接近的单位” E29年 . （B） 供应商和客户之间约定的价值。 （C） 如有争议，测试方法 D1122 是首选测试方法。 （D） 试验方法 D1177 和 D6660 使用乙二醇/甘油混合物。 （E） 如有争议，测试方法 D1177 是首选测试方法。 注1: 本规范基于从新成分或原始成分制备的传热流体的性能知识。本规范也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，前提是这些成分满足规范的要求 E1177 和 D7388 用于二醇和规格 D7640 甘油。 注2: 本规范涉及将与水混合以在各种气候下使用的浓缩抑制二醇和甘油，以及工厂生产的预稀释传热液（HTF）- 与纯净水混合。适当稀释下的估计防冻温度表见 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）。本标准的用户有责任在使用前制定适当的安全和健康实践，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（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 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 . (A) For purposes of determining conformance with this specification, an observed value shall be rounded “to the nearest unit” in the last right-hand digit used in expressing the specification limit, in accordance with the rounding method of Practice E29 . (B) Value as agreed upon between the supplier and the customer. (C) In case of dispute, Test Method D1122 is the preferred test method. (D) Test Methods D1177 and D6660 work with glycol/glycerin mixtures. (E) In case of dispute, Test Method D1177 is the preferred test method. 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 and health 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.