1.1 本试验方法包括测定航空涡轮燃料中可能形成固体碳氢化合物晶体的温度。 1.2 该测试方法旨在覆盖–80℃的温度范围 °C至20 °C；然而 12.4 仅演示了冰点在–60范围内的燃料的试验方法 °C至–42 °C。 1.3 以国际单位制表示的值应视为标准值。本标准不包括其他测量单位。 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建立适当的安全、健康和环境实践，并在使用前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 航空燃料的冰点是指燃料保持不含固体烃晶体的最低温度，如果固体烃晶体存在于飞机的燃料系统中，则会限制燃料通过过滤器的流动。 飞机油箱中的燃油温度通常在飞行过程中降低，这取决于飞机速度、高度和飞行持续时间。燃料的冰点应始终低于最低运行燃料温度。 5.2 石油混合操作需要精确测量冰点。 5.3 该测试方法将结果精确到0.1 °C，并且消除了测试方法所需的大部分操作员时间和判断 第2386页 . 5.4 当规范要求测试方法时 第2386页 ，不得替代本试验方法或任何其他试验方法。

1.1 This test method covers the determination of the temperature below which solid hydrocarbon crystals may form in aviation turbine fuels. 1.2 This test method is designed to cover the temperature range of –80 °C to 20 °C; however, the interlaboratory study mentioned in 12.4 has only demonstrated the test method with fuels having freezing points in the range of –60 °C to –42 °C. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 to 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 The freezing point of an aviation fuel is the lowest temperature at which the fuel remains free of solid hydrocarbon crystals which, if present in the fuel system of the aircraft, can restrict the flow of fuel through filters. The temperature of the fuel in the aircraft tank normally decreases during flight depending on aircraft speed, altitude, and flight duration. The freezing point of the fuel shall always be lower than the minimum operational fuel temperature. 5.2 Petroleum blending operations require precise measurement of the freezing point. 5.3 This test method expresses results to the nearest 0.1 °C, and it eliminates most of the operator time and judgment required by Test Method D2386 . 5.4 When a specification requires Test Method D2386 , do not substitute this test method or any other test method.