1.1 本试验方法包括评估最终沸点低于390的水和燃料的趋势 °C，按试验方法测量 D86 ，当它们可能含有潜在的乳液形成添加剂或组分，或已添加潜在的乳液形成添加剂或组分时，清洁地分离而不是产生乳液。 1.2 本试验方法主要适用于汽油、柴油、煤油和燃气轮机、船用、家用取暖油和熔炉燃料的馏出物等级（见规范 D396页 , D975 , D2880 , D3699 , D4814 和 D6985 ). 有关生物柴油或酒精等燃油成分，请参阅 X1.2 和 X1.3 . 1.3 本试验方法不是为了认证或鉴定销售燃料，而是供添加剂供应商使用，以确定其添加剂包装中是否需要破乳剂成分。 1.4 本试验方法不适用于含有大量水溶性成分（如E85）的燃料的试验，也不适用于水乳化燃料的试验，也不适用于航空燃料的试验。 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 本试验方法的主要用途是评估特定燃料中的新添加剂包，以确保添加剂包的使用不会影响燃料水的可分离性，无论是在其正常处理率下，还是在预期处理率的几倍下，以评估潜在过度处理的影响。 5.1.1 水量变化- 使用该技术可以揭示燃油中是否存在水溶性成分，如醇类。 5.1.2 接口条件额定值- 使用该技术可以发现燃料中存在部分可溶成分，如表面活性剂。 5.2 影响界面的添加剂或污染物可能会损害设备中燃料的水分离性能，并迅速抑制燃料通过过滤器和喷射设备的自由流动，导致燃烧性能下降。

1.1 This test method covers the evaluation of the tendency of water and fuels with a final boiling point of less than 390 °C, as measured in Test Method D86 , to separate cleanly rather than create emulsions when they may contain potential emulsion forming additives or components, or have been additized with potential emulsion forming additives, or components. 1.2 This test method applies primarily to gasoline, diesel, kerosine, and distillate grades of gas turbine, marine, home heating oils and furnace fuels (see Specifications D396 , D975 , D2880 , D3699 , D4814 , and D6985 ). For fuel components such as biodiesel or alcohol, refer to X1.2 and X1.3 . 1.3 This test method is not meant to certify or qualify fuels for sale, but it is intended for use by additive suppliers to determine the need for demulsifier components in their additive packages. 1.4 This test method is not meant for testing of fuels containing large amounts of aqueous soluble components, such as E85, or for testing of water emulsified fuels, or for testing of aviation fuels. 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 primary use of this test method is to evaluate new additive packages in specific fuels to ensure that fuel-water separability will not be compromised by the use of the additive package, either at their normal treat rates or at several times the intended treat rate to evaluate the impact of potential overtreatment. 5.1.1 Water Volume Changes— Using this technique reveal the presence of water-soluble components, such as alcohols, in the fuel. 5.1.2 Interface Condition Ratings— Using this technique reveal the presence of partially soluble components, such as surfactants, in the fuel. 5.2 Additives or contaminants that affect the interface could harm water separation properties of fuels in equipment and quickly inhibit the free flow of fuel through filters and injection equipment, causing a decrease in combustion performance.