1.1 本试验方法包括通过过滤测定中间馏出燃料中颗粒污染物的质量。本试验方法适用于规范中的所有1号和2号等级 D396页 , D975 , D2880 和 D3699 规范中的DMA和DMB级 D2069 . 1.2 本试验方法不适用于其闪点由试验方法确定的燃料 D56 , D93 或 D3828 小于38 °C。 注1: 闪点低于38的中间馏分燃料 当燃料通过未充分结合或接地的膜过滤系统过滤时，静电放电点燃°C。 见测试方法 D2276 和 D5452 用于确定规范中颗粒污染的方法 D1655 航空涡轮燃料和其他类似航空燃料。请参阅指南 D4865 有关静电形成和放电的更详细讨论。 1.3 该测试方法尚未验证是否可用于测试生物柴油，例如是否符合规范 D6751 或中间馏分油和生物柴油的混合物，如符合规格 D7467 ，或两者兼而有之。试验方法 D7321 已确定适用于测试B100和所有中间馏分油与生物柴油的混合物。 注2: 1号和1号。 规范中有2个等级 D396页 或 D975 当前最多允许5个 % 符合规格的生物柴油 D6751 . 含有生物柴油的样品可能会导致膜过滤器部分溶解或受损，并给出错误的结果。 1.4 本试验方法的精度适用于0 克/米 3. 至25 克/米 3. 前提是1 使用L个样本，1个 L完全过滤。可以测量较高水平的颗粒污染物，但精度不确定。 1.5 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。 1.6 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。 1.7 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====== 5.1 这是第一个用于评估中间馏出燃料中颗粒物质量的ASTM标准测试方法。试验方法 D5452 及其前身试验方法 D2276 为航空燃料开发并使用1 gal或5 L燃料样品。使用1 gal的中间馏分燃料可能含有更高的颗粒水平，通常需要过多的时间才能完成过滤。该试验方法使用的体积约为航空燃料方法中使用体积的四分之一。 5.2 燃油中颗粒的质量以及单个颗粒的大小和性质是影响燃油系统滤清器和燃油系统中其他小孔堵塞速度的一个重要因素。 本试验方法提供了一种评估燃料样品中颗粒质量的方法。 5.3 该试验方法可用于规范和采购文件中，作为控制所购燃料中颗粒污染水平的一种手段。一些军用燃料规范中规定了最大微粒水平。

1.1 This test method covers the determination of the mass of particulate contamination in a middle distillate fuel by filtration. This test method is suitable for all No. 1 and No. 2 grades in Specifications D396 , D975 , D2880 and D3699 and for grades DMA and DMB in Specification D2069 . 1.2 This test method is not suitable for fuels whose flash point as determined by Test Methods D56 , D93 or D3828 is less than 38 °C. Note 1: Middle distillate fuels with flash points less than 38 °C have been ignited by discharges of static electricity when the fuels have been filtered through inadequately bonded or grounded membrane filter systems. See Test Methods D2276 and D5452 for means of determining particulate contamination in Specification D1655 aviation turbine fuels and other similar aviation fuels. See Guide D4865 for a more detailed discussion of static electricity formation and discharge. 1.3 This test method has not been validated for testing biodiesel, such as meeting Specification D6751 or blends of middle distillates and biodiesel, such as meeting Specification D7467 , or both. Test Method D7321 has been determined to be suitable for testing B100 and all blends of middle distillates and biodiesel. Note 2: No. 1 and No. 2 grades in Specifications D396 or D975 currently allow up to 5 % biodiesel meeting Specification D6751 . Samples containing biodiesel can result in partial dissolution or compromise of the membrane filters and give erroneous results. 1.4 The precision of this test method is applicable to particulate contaminant levels between 0 g/m 3 to 25 g/m 3 provided that 1 L samples are used and the 1 L is filtered completely. Higher levels of particulate contaminant can be measured, but are subject to uncertain precision. 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 This is the first ASTM standard test method for assessing the mass quantity of particulates in middle distillate fuels. Test Method D5452 and its predecessor Test Method D2276 were developed for aviation fuels and used 1 gal or 5 L of fuel sample. Using 1 gal of a middle distillate fuel, which can contain greater particulate levels, often required excessive time to complete the filtration. This test method used about a quarter of the volume used in the aviation fuel methods. 5.2 The mass of particulates present in a fuel is a significant factor, along with the size and nature of the individual particles, in the rapidity with which fuel system filters and other small orifices in fuel systems can become plugged. This test method provides a means of assessing the mass of particulates present in a fuel sample. 5.3 The test method can be used in specifications and purchase documents as a means of controlling particulate contamination levels in the fuels purchased. Maximum particulate levels are specified in several military fuel specifications.