1.1本规范涵盖由至少25%的废润滑油制成的四个等级的燃油。这四个等级的燃料拟用于各种类型的燃油燃烧工业设备和商业锅炉，在各种气候和操作条件下使用。这些燃料不适用于家用加热器。 1.1.1等级RFC4、RFC5L、RFC5H和RFC6是使用粘度增加的润滑油混合物，有或没有中间馏出物或残余燃料油，或两者兼有，用于工业燃烧器和配备有处理此类燃料的商业锅炉。 本规范适用于规范D 6448不符合相关燃烧器或锅炉性能或其他要求的应用。 注1-有关本规范中使用的术语和测试方法的重要性的信息，请参阅。 1.2本规范用于从使用过的润滑油中采购燃油的合同中，并用于指导此类燃油的消费者。本规范不涉及任何特定测试必须运行的频率。 1.3本规范中的任何内容均不得妨碍遵守更具限制性的国家或地方法规。在某些管辖区，废油被视为危险废物，从废油中提取的燃料在用作燃料之前需要满足某些标准。 注2-有关对废油发生器、运输和转运设施、再加工厂、营销商和燃烧器施加的美国联邦要求，请参见《美国联邦法规》40 CFR 279。 注3-静电的产生和耗散可能会在处理蒸馏燃烧器燃油时产生问题。 有关该主题的更多信息，请参阅指南D 4865。 1.4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。

1.1 This specification covers four grades of fuel oil made of at least 25 % used lubricating oils. The four grades of fuel are intended for use in various types of fuel-oil-burning industrial equipment and commercial boilers under various climatic and operating conditions. These fuels are not intended for use in residential heaters. 1.1.1 Grades RFC4, RFC5L, RFC5H and RFC6 are used lubricating oil blends of increasing viscosity, with or without middle distillate or residual fuel oil, or both, that are intended for use in industrial burners and commercial boilers equipped to handle these types of fuels. This specification is for applications where Specification D 6448 would not meet the performance or other requirements of the burner or boiler in question. Note 1—For information on the significance of the terminology and test methods used in this specification, see. 1.2 This specification is for use in contracts for the purchase of fuel oils derived from used lubricating oil and for the guidance of consumers of such fuels. This specification does not address the frequency with which any particular test must be run. 1.3 Nothing in this specification shall preclude observance of national or local regulations which can be more restrictive. In some jurisdictions, used oil is considered a hazardous waste and fuels derived from used oil are required to meet certain criteria before use as a fuel. Note 2—For U.S. federal requirements imposed on used oil generators, transporters and transfer facilities, reprocessors, marketers, and burners, see U.S. Federal Code 40 CFR 279. Note 3—The generation and dissipation of static electricity can create problems in the handling of distillate burner fuel oils. For more information on the subject, see Guide D 4865. 1.4 The value stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.