1.1 本试验方法包括两个步骤，用于测量在所需试验温度下为流体的材料密度。其应用仅限于蒸汽压低于80的液体 kPa（600 mm Hg），粘度低于40 000毫米 2. /试验温度下的s（cSt）。该方法设计用于20℃和20℃之间的任何温度 °C和100 °C。可在更高温度下使用；然而，在这种情况下，精度部分不适用。 注1: 对于在常温下为流体的材料密度的测定，见试验方法 D1217 . 1.2 本试验方法提供了将密度转换为比重的计算程序。 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 警告 -许多监管机构已将汞指定为一种危险物质，可导致严重的医疗问题。汞或其蒸汽已被证明对健康有害，并对材料具有腐蚀性。处理汞和含汞产品时要小心。有关更多信息，请参阅适用的产品安全数据表（SDS）。当地或国家法律禁止销售汞或含汞产品，或两者兼有。用户必须确定其所在地销售的合法性。 1.5 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。 1.6 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 密度是一种基本的物理性质，可与其他性质结合使用，以表征石油的轻馏分和重馏分，并评估原油的质量。 5.2 在15℃的标准温度下，需要测定石油及其产品的密度或相对密度，以将测量体积转换为体积 °C。 5.3 40℃高温下密度的测定 °C和100 °C在提供以毫米为单位的运动粘度转换所需的数据时特别有用 2. /s（厘斯托克斯）对应的动态粘度，单位为mPa·s（厘泊）。

1.1 This test method covers two procedures for the measurement of the density of materials which are fluid at the desired test temperature. Its application is restricted to liquids of vapor pressures below 80 kPa (600 mm Hg) and viscosities below 40 000 mm 2 /s (cSt) at the test temperature. The method is designed for use at any temperature between 20 °C and 100 °C. It can be used at higher temperatures; however, in this case the precision section does not apply. Note 1: For the determination of density of materials which are fluid at normal temperatures, see Test Method D1217 . 1.2 This test method provides a calculation procedure for converting density to specific gravity. 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 WARNING —Mercury has been designated by many regulatory agencies as a hazardous substance that can cause serious medical issues. Mercury, or its vapor, has been demonstrated to be hazardous to health and corrosive to materials. Use Caution when handling mercury and mercury-containing products. See the applicable product Safety Data Sheet (SDS) for additional information. The potential exists that selling mercury or mercury-containing products, or both, is prohibited by local or national law. Users must determine legality of sales in their location. 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 Density is a fundamental physical property that can be used in conjunction with other properties to characterize both the light and heavy fractions of petroleum and to assess the quality of crude oils. 5.2 Determination of the density or relative density of petroleum and its products is necessary for the conversion of measured volumes to volumes at the standard temperatures of 15 °C. 5.3 The determination of densities at the elevated temperatures of 40 °C and 100 °C is particularly useful in providing the data needed for the conversion of kinematic viscosities in mm 2 /s (centistokes) to the corresponding dynamic viscosities in mPa·s (centipoises).