1.1 本规范涵盖了汽车或其他轻型服务冷却系统中使用的乙二醇或丙二醇或含乙二醇的甘油基发动机冷却液的要求。当浓度为40时 % 至60 % 浓度（允许70 % 制造商和用户之间的浓度协议）或当使用50%或更高体积的预稀释乙二醇基发动机冷却液浓缩液而无需进一步稀释时，它们将有效地提供防冻、沸腾和腐蚀保护。 1.2 本规范规定的冷却液分类如下: 冷却剂类型 描述 我 乙二醇基浓缩物 二、 丙二醇基浓缩物 五、 乙二醇基浓缩物 含甘油 三、 乙二醇预稀释50%或更高体积的发动机冷却液浓缩液 四、 丙二醇预稀释50%或更高体积的发动机冷却液浓缩液 六、 乙二醇基预稀释液 含有50%或更高体积百分比的甘油的发动机冷却液浓缩液 注1: 本规范基于对由新成分或原始成分制备的发动机冷却液性能的了解。 本规范还适用于使用回收或再处理的旧冷却液或再处理的工业源乙二醇生成的乙二醇制备的发动机冷却液，前提是所述乙二醇满足规范的要求 E1177 . 单独规范( D6471 和 D6472 )适用于由不符合规范中规定要求的回收或再加工用冷却液或再加工工业源乙二醇制备的发动机冷却液 E1177 . 本规范还适用于使用完全精制甘油制备的乙二醇基发动机冷却液，前提是所述甘油满足规范要求 D7640 . 1.3 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。 1.4 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2: 本规范适用于汽车和轻型车用乙二醇基发动机冷却液- 值班服务。规格 D4985 和 D6210 适用于重型发动机维修。 1.5 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 or propylene glycol or ethylene glycol containing glycerin base engine coolants used in automobiles or other light-duty service cooling systems. When concentrates are used at 40 % to 60 % concentration (allowance to 70 % concentration agreement between manufacturer and user) by volume in water, or when prediluted glycol base engine coolants 50 volume % or higher engine coolant concentrate are used without further dilution, they will function effectively to provide protection against freezing, boiling, and corrosion. 1.2 The coolants governed by this specification are categorized as follows: Coolant Type Description I Ethylene glycol base concentrate II Propylene glycol base concentrate V Ethylene glycol base concentrate containing glycerin III Ethylene glycol predilute 50 volume % or higher engine coolant concentrate IV Propylene glycol predilute 50 volume % or higher engine coolant concentrate VI Ethylene glycol base predilute containing glycerin 50 volume % or higher engine coolant concentrate Note 1: This specification is based on the knowledge of the performance of engine coolants prepared from new or virgin ingredients. This specification shall also apply to engine coolants prepared using glycol generated from recycled or reprocessed used coolant or reprocessed industrial-source glycol, provided that said glycol meets the requirements of Specification E1177 . Separate specifications ( D6471 and D6472 ) exist for engine coolants prepared from recycled or reprocessed used coolant or reprocessed industrial-source glycol that does not meet the requirements established in Specification E1177 . This specification shall also apply to glycol based engine coolants prepared using fully refined glycerin provided that said glycerin meets the requirements for Specification D7640 . 1.3 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. 1.4 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 2: This specification applies to glycol base engine coolant for automobiles and light-duty service. Specifications D4985 and D6210 exist for heavy duty engine service. 1.5 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.