1.1 本规范涵盖了重型发动机冷却系统用全配方甘油基冷却液的要求。当浓度为40时 % 至60 % 质量合适的水中甘油的体积浓度（见 附录X1 )或当使用预稀释的甘油基发动机冷却液（50体积%分钟）而不进一步稀释时，它们将在冬季和夏季有效发挥作用，以防腐蚀、气蚀、冻结和沸腾。 1.2 本规范旨在涵盖由纯甘油制备的发动机冷却液的要求。 注1: 本规范基于对由符合规范的新成分或原始成分制备的发动机冷却液性能的了解 D7714 . 1.3 本规范规定的冷却液分类如下: 冷却剂类型 描述 V-FF 甘油基浓缩物 VI-FF 甘油预稀释液（50 vol%） 1.4 符合本规范的冷却液浓缩液不需要添加补充冷却液添加剂（SCA），直到第一个维护间隔，此时需要SCA的维护剂量来继续保护某些重型发动机冷却系统，特别是缸体设计中的湿式缸套。SCA添加由发动机制造商或车辆制造商定义，并由其承担主要责任。如果他们没有提供说明，请遵循SCA供应商的说明。 1.5 以国际单位制表示的数值应视为标准值。国际单位制后括号中给出的值仅供参考，不被视为标准值。 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。 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 fully-formulated glycerin base coolants for cooling systems of heavy-duty engines. When concentrates are used at 40 % to 60 % glycerin concentration by volume in water of suitable quality (see Appendix X1 ), or when prediluted glycerin base engine coolants (50 volume % min) are used without further dilution, they will function effectively during both winter and summer to provide protection against corrosion, cavitation, freezing, and boiling. 1.2 This specification is intended to cover the requirements for engine coolants prepared from virgin glycerin. Note 1: This specification is based on the knowledge of the performance of engine coolants prepared from new or virgin ingredients that comply with Specification D7714 . 1.3 The coolants governed by this specification are categorized as follows: Coolant Type Description V-FF Glycerin base concentrate VI-FF Glycerin predilute (50 vol %) 1.4 Coolant concentrates meeting this specification do not require addition of supplemental coolant additive (SCA) until the first maintenance interval when a maintenance dose of SCA is required to continue protection in certain heavy duty engine cooling systems, particularly those of the wet cylinder liner-in-block design. The SCA additions are defined by and are the primary responsibility of the engine manufacturer or vehicle manufacturer. If they provide no instructions, follow the SCA supplier's instructions. 1.5 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 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.