1.1 本试验方法包括通过自动装置测定石油产品的倾点，该装置在试样冷却时向试样表面施加略为正的空气压力。 1.2 此测试方法适用于−57的温度范围 °C至+51 °C；然而，（1998年）实验室间试验计划中包含的温度范围仅涵盖−51的温度范围 °C至−11 °C。 1.3 此测试方法的测试结果可在1 °C或3 °C测试间隔。 1.4 本试验方法不适用于原油。 注1: 该试验方法对残余燃料样品的适用性尚未得到验证。有关适用性的更多信息，请参阅 13.4 . 1.5 以国际单位制表示的数值应视为标准。 本标准不包括其他计量单位。 1.6 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。 1.7 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。 ====意义和用途====== 5.1 石油产品的倾点是其在某些应用中的最低使用温度的指标。 流动特性，如倾点，对于润滑系统、燃料系统和管道操作的正确操作至关重要。 5.2 石油调配操作需要精确测量倾点。 5.3 此测试方法的测试结果可在1 °C或3 °C间隔。 5.4 该试验方法以类似于试验方法的形式得出倾点 D97 /IP 15当3 报告°C间隔结果。但是，当规范要求试验方法时 D97 /IP 15，不得替代此测试方法。 注2: 由于一些用户可能希望以类似于测试方法的格式报告他们的结果 D97 /IP 15（在3 °C区间），得出了3 °C间隔。关于相对于试验方法的偏差的说明 D97 /IP 15，参见 13.3.1 . 5.5 相对于试验方法，该试验方法具有更好的重复性和再现性 D97 /1998年实验室间试验程序中测得的IP 15（见第节 13 ).

1.1 This test method covers the determination of pour point of petroleum products by an automatic apparatus that applies a slightly positive air pressure onto the specimen surface while the specimen is being cooled. 1.2 This test method is designed to cover the range of temperatures from −57 °C to +51 °C; however, the range of temperatures included in the (1998) interlaboratory test program only covered the temperature range from −51 °C to −11 °C. 1.3 Test results from this test method can be determined at either 1 °C or 3 °C testing intervals. 1.4 This test method is not intended for use with crude oils. Note 1: The applicability of this test method on residual fuel samples has not been verified. For further information on the applicability, refer to 13.4 . 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.6 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. 1.7 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 pour point of a petroleum product is an index of the lowest temperature of its utility for certain applications. Flow characteristics, like pour point, can be critical for the correct operation of lubricating systems, fuel systems, and pipeline operations. 5.2 Petroleum blending operations require precise measurement of the pour point. 5.3 Test results from this test method can be determined at either 1 °C or 3 °C intervals. 5.4 This test method yields a pour point in a format similar to Test Method D97 /IP 15 when the 3 °C interval results are reported. However, when specification requires Test Method D97 /IP 15, do not substitute this test method. Note 2: Since some users may wish to report their results in a format similar to Test Method D97 /IP 15 (in 3 °C intervals), the precision data were derived for the 3 °C intervals. For statements on bias relative to Test Method D97 /IP 15, see 13.3.1 . 5.5 This test method has better repeatability and reproducibility relative to Test Method D97 /IP 15 as measured in the 1998 interlaboratory test program (see Section 13 ).