1.1 本试验方法涵盖了确定航空涡轮燃料可过滤性的程序（对于其他中间馏分燃料，参见试验方法 第6426页 ). 注1: 本试验方法范围内的ASTM规范燃料为规范 1655年 和 D6615型 以及 2.2 . 1.2 本试验方法不适用于含有未溶解水的燃料。 1.3 以国际单位制表示的值应视为标准值。SI单位后括号中给出的值仅供参考，不视为标准值。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 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《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 5.1 本试验方法适用于实验室或现场评估航空涡轮燃料清洁度。 5.2 储存、预处理或混合后过滤性能的变化可指示燃料状况的变化。 5.3 燃料的相对过滤性可能会有所不同，这取决于过滤器的孔隙率和结构，并且可能并不总是与本试验方法的结果相关。 5.4 工业/炼油厂过滤器过滤性差的原因包括燃料降解产物、储存或运输过程中收集的污染物、混合燃料的不相容性或燃料与过滤介质的相互作用。 其中任何一种都可能与节流孔或过滤器系统堵塞有关，或两者兼有。

1.1 This test method covers a procedure for determining the filterability of aviation turbine fuels (for other middle distillate fuels, see Test Method D6426 ). Note 1: ASTM specification fuels falling within the scope of this test method are Specifications D1655 and D6615 and the military fuels covered in the military specifications listed in 2.2 . 1.2 This test method is not applicable to fuels that contain undissolved water. 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. 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. ====== Significance And Use ====== 5.1 This test method is intended for use in the laboratory or field in evaluating aviation turbine fuel cleanliness. 5.2 A change in filtration performance after storage, pretreatment, or commingling can be indicative of changes in fuel condition. 5.3 Relative filterability of fuels may vary, depending on filter porosity and structure, and may not always correlate with results from this test method. 5.4 Causes of poor filterability in industrial/refinery filters include fuel degradation products, contaminants picked up during storage or transfer, incompatibility of commingled fuels, or interaction of the fuel with the filter media. Any of these could correlate with orifice or filter system plugging, or both.