1.1 本试验方法涵盖了涉及沉淀沥青质的滴定和光学检测的自动化程序，用于确定炼油厂残余物流、残余燃料油和原油的稳定性和相容性参数。在这种情况下，稳定性是将沥青质维持在胶溶或溶解状态并且不经历絮凝或沉淀的能力。类似地，相容性涉及混合两种或更多种油而没有沥青质沉淀或絮凝的性质。 1.2 本试验方法适用于常压和减压蒸馏、热、催化和加氢裂化过程的残余产品，以及规格典型产品 D396 、5L、5H和6级，以及 D2880 、等级号3-GT和4-GT以及原油，条件是这些产品含有0。沥青质浓度为05质量什麽样。 1.3 该测试方法与沥青质含量低于0.05%的油无关，应用于已经含有絮凝沥青质的不稳定油没有意义。 1.4 以SI单位表示的值将被视为标准值。本标准不包括其他计量单位。 1.5 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。 1.6 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 使用光背散射技术自动确定稳定性参数提高了准确性并消除了人为错误。在人工测试中，操作人员必须目视比较滤纸片上的油污，以确定沥青质是否已沉淀。 5.2 如果可以更准确地计算稳定性参数，炼油厂的热和加氢裂化过程可以更接近其严重性极限。这提高了产量和盈利能力。 5.3 测试方法的结果可用于设定燃料油稳定性参数的标准规范。 5.4 原油的相容性参数可用于炼油厂的原油共混，以预先确定哪些原油共混物将是相容的，因此可用于最小化堵塞问题、装置停机和维护成本。原油相容性参数的确定也使炼油厂能够更经济地选择原油混合物。 5.5 该测试方法可以测量稳定性和相容性参数，并确定用于特定应用的不同混合物的稳定性储备，以优化重燃料油的混合、储存和使用 注1: 该测试方法的用户通常使用稳定性和相容性参数来确定残余产品、燃料混合物和原油的稳定性储备。然而，稳定性、稳定性储备和相容性的解释严重依赖于“用途”，超出了本试验方法的范围。

1.1 This test method covers an automated procedure involving titration and optical detection of precipitated asphaltenes for determining the stability and compatibility parameters of refinery residual streams, residual fuel oils, and crude oils. Stability in this context is the ability to maintain asphaltenes in a peptized or dissolved state and not undergo flocculation or precipitation. Similarly, compatibility relates to the property of mixing two or more oils without precipitation or flocculation of asphaltenes. 1.2 This test method is applicable to residual products from atmospheric and vacuum distillation, from thermal, catalytic, and hydrocracking processes, to products typical of Specifications D396 , Grades No. 5L, 5H, and 6, and D2880 , Grades No. 3-GT and 4-GT, and to crude oils, providing these products contain 0.05 % by mass or greater concentration of asphaltenes. 1.3 This test method is not relevant to oils that contain less than 0.05 % asphaltenes, and would be pointless to apply to unstable oils that already contain flocculated asphaltenes. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 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. 1.6 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 Automatic determination of stability parameters using a light back-scattering technique improves accuracy and removes human errors. In manual testing, operators have to visually compare oil stains on pieces of filter paper to determine if asphaltenes have been precipitated. 5.2 Refinery thermal and hydrocracking processes can be run closer to their severity limits if stability parameters can be calculated more accurately. This gives increased yield and profitability. 5.3 Results from the test method could be used to set a standard specification for stability parameters for fuel oils. 5.4 The compatibility parameters of crude oils can be used in crude oil blending in refineries to determine, in advance, which crude oil blends will be compatible and thus can be used to minimize plugging problems, unit shut downs, and maintenance costs. Determination of crude oil compatibility parameters also enables refineries to select crude oil mixtures more economically. 5.5 This test method can measure stability and compatibility parameters, and determine stability reserve on different blends for particular applications to optimize the blending, storage, and use of heavy fuel oils Note 1: Users of this test method would normally use stability and compatibility parameters to determine stability reserve of residual products, fuel blends and crude oils. However, the interpretation of stability, stability reserve and compatibility is heavily ‘use dependent,’ and is beyond the scope of this test method.