1.1 本规范涵盖四个等级的燃油，全部或部分使用基于碳氢化合物的二手或再加工润滑油或功能性流体（如防腐剂和液压液）制成。这四种等级的燃料适用于各种气候和操作条件下的各种类型的燃油燃烧工业设备。这些燃料不适用于家用加热器、小型商业锅炉、内燃机或船舶应用， 1.1.1 RFO4、RFO5L、RFO5H和RFO6级是使用的润滑油混合物，有或没有增加粘度的馏出物或残余燃料油，或两者都有，用于配备处理这些类型回收燃料的工业燃烧器。 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 附录X1 . 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国家或地方法规，这些法规可能具有更大的限制性。在一些管辖区，废油被视为危险废物，废油中的燃料在用作燃料之前需要满足某些标准。 注2: 有关美国联邦对废油发生器、运输和转运设施、再加工厂、营销商和燃烧器的要求，请参见40 CFR 279。 注3: 静电的产生和消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 D4865 . 1.4 以国际单位制表示的数值应视为标准值；非国际单位制（如有）仅供参考。

1.1 This specification covers four grades of fuel oil made in whole or in part with hydrocarbon-based used or reprocessed lubricating oil or functional fluids, such as preservative and hydraulic fluids. The four grades of fuel are intended for use in various types of fuel-oil-burning industrial equipment under various climatic and operating conditions. These fuels are not intended for use in residential heaters, small commercial boilers, combustion engines, or marine applications, 1.1.1 Grades RFO4, RFO5L, RFO5H, and RFO6 are used lubricating oil blends, with or without distillate or residual fuel oil, or both, of increasing viscosity and are intended for use in industrial burners equipped to handle these types of recycled fuels. Note 1: For information on the significance of the terminology and test methods used in this specification, see Appendix X1 . 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 from used oil are required to meet certain criteria before use as a fuel. Note 2: For United States federal requirements imposed on used oil generators, transporters and transfer facilities, reprocessors, marketers, and burners, see 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 D4865 . 1.4 The values stated in SI units are to be regarded as standard; non-SI units, when given, are for information only.