1.1 本试验方法包括测定灰分不超过0.5的焦油和沥青的焦化值 % 由试验方法确定 D2415 . 1.2 该试验方法的结焦值实际上与通过试验方法获得的结焦值相同 D189 ，但结果更具再现性。除了用电炉代替气体火焰外，所用的设备是相同的。 1.3 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。 1.4 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。 1.5 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《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====== 4.1 该试验方法可用于指示相对焦炭形成倾向，以及评估和表征焦油和沥青。该试验方法也可作为确定装运或供应来源一致性的一个要素。

1.1 This test method covers the determination of the coking value of tar and pitch having an ash content not over 0.5 % as determined by Test Method D2415 . 1.2 Coking values by this test method are practically the same as those obtained by Test Method D189 , but results are more reproducible. The apparatus used is identical, except that an electric furnace is substituted for the gas flame. 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 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 ====== 4.1 This test method is useful for indicating the relative coke-forming propensities and for evaluating and characterizing tars and pitches. This test method can also be used as one element in establishing the uniformity of shipments or sources of supply.