1.1 本试验方法包括测定航空涡轮燃料和航空汽油中可能形成固体碳氢化合物晶体的温度。如果无法测量结晶点或冰点，则该测试可用于报告在结晶点之前达到的最低可测量温度。 注1: 产生本试验方法精度的实验室间程序不包括航空汽油。 1.2 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.3 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。 有关特定警告声明，请参阅 5.4 部分 6. 和 8.3 . 1.4 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。 ====意义和用途====== 4.1 航空燃油的冰点是燃油不含固体碳氢化合物晶体的最低温度，如果飞机燃油系统中存在固体碳氢化合物晶体，则固体碳氢化合物晶体会限制燃油通过过滤器的流动。飞行期间，飞机油箱中的燃油温度通常会下降，具体取决于飞机速度、高度和飞行持续时间。燃油的冰点必须始终低于油箱的最低工作温度。 4.2 凝固点是规范中的一项要求 D910 和 D1655 .

1.1 This test method covers the determination of the temperature below which solid hydrocarbon crystals may form in aviation turbine fuels and aviation gasoline. If no crystallization point or freezing point can be measured, this test can be used to report the lowest measurable temperature reached before the crystallization point. Note 1: The interlaboratory program that generated the precisions for this test method did not include aviation gasoline. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 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. For specific warning statements, see 5.4 , Section 6 , and 8.3 . 1.4 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 ====== 4.1 The freezing point of an aviation fuel is the lowest temperature at which the fuel remains free of solid hydrocarbon crystals that can restrict the flow of fuel through filters if present in the fuel system of the aircraft. The temperature of the fuel in the aircraft tank normally falls during flight depending on aircraft speed, altitude, and flight duration. The freezing point of the fuel must always be lower than the minimum operational tank temperature. 4.2 Freezing point is a requirement in Specifications D910 and D1655 .