1.1 本规范涵盖UL82和UL87级无铅航空汽油，这些汽油由本规范定义，仅用于发动机和飞机制造商特别批准并经国家认证机构认证使用这些燃料的发动机和相关飞机。含有杂原子（含氧化合物）的成分可能存在于规定的限度内。 1.2 只有当燃料与精炼商批准用于这些等级航空汽油的组分混合时，生产商才能将燃料认证为符合本规范的UL82或UL87级航空汽油，因为只有精炼商才能证明组分的来源和加工、没有污染、使用的添加剂及其浓度。因此，将任何其他产品重新分类为UL82级或UL87级航空汽油不符合本规范。 1.3 附录X1 包含对规范基本原理的解释。 附录X2 详细说明了个别规范要求的原因。 1.4 以国际单位制表示的数值应视为标准。SI单位后括号中给出的值仅供参考，不被视为标准值。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。

1.1 This specification covers Grades UL82 and UL87 unleaded aviation gasolines, which are defined by this specification and are only for use in engines and associated aircraft that are specifically approved by the engine and aircraft manufacturers, and certified by the National Certifying Agencies to use these fuels. Components containing hetro-atoms (oxygenates) may be present within the limits specified. 1.2 A fuel may be certified to meet this specification by a producer as Grade UL82 or UL87 aviation gasoline only if blended from component(s) approved for use in these grades of aviation gasoline by the refiner(s) of such components, because only the refiner(s) can attest to the component source and processing, absence of contamination, and the additives used and their concentrations. Consequently, reclassifying of any other product to Grade UL82 or Grade UL87 aviation gasoline does not meet this specification. 1.3 Appendix X1 contains an explanation for the rationale of the specification. Appendix X2 details the reasons for the individual specification requirements. 1.4 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. 1.5 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.