1.1 本试验方法包括测定原油的密度、相对密度和API比重，这些原油可在15 摄氏度和35度 °C，使用手动或自动样品注入设备。本试验方法适用于具有高蒸气压的原油，前提是采取了适当的预防措施，以防止样品转移至密度分析仪期间的蒸汽损失。 1.2 该试验方法在实验室间研究试验中使用0.75 g/mL至0.95 g/mL范围内。轻质原油可能需要特殊处理，以防止蒸汽损失。 1.3 以国际单位制表示的数值应视为标准值。本标准包括其他计量单位。可接受的密度测量单位为克/毫升和千克/立方米。 1.4 本标准并不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建立适当的安全、健康和环境实践，并确定监管限制的适用性。 中给出了具体的警告声明 7.4 , 7.5 和 7.6 . 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====== 5.1 密度是一种基本的物理性质，可与其他性质一起用于表征原油质量。 5.2 原油的密度或相对密度用于将测量体积转换为标准温度15℃下的体积 摄氏度或60度 用于将原油质量测量值转换为体积单位。 5.3 应用本试验方法获得的密度结果进行财务或保管转移会计计算时，可能需要测量原油包裹类似样本上获得的水和沉积物含量。

1.1 This test method covers the determination of the density, relative density, and API gravity of crude oils that may be handled in a normal fashion as liquids at test temperatures between 15 °C and 35 °C utilizing either manual or automated sample injection equipment. This test method applies to crude oils with high vapor pressures provided appropriate precautions are taken to prevent vapor loss during transfer of the sample to the density analyzer. 1.2 This test method was evaluated in interlaboratory study testing using crude oils in the 0.75 g/mL to 0.95 g/mL range. Lighter crude oil may require special handling to prevent vapor losses. 1.3 The values stated in SI units are to be regarded as standard. Other units of measurement are included in this standard. The accepted units of measurement of density are grams per millilitre and kilograms per cubic metre. 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. Specific warning statements are given in 7.4 , 7.5 , and 7.6 . 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 ====== 5.1 Density is a fundamental physical property that may be used in conjunction with other properties to characterize the quality of crude oils. 5.2 The density or relative density of crude oils is used for the conversion of measured volumes to volumes at the standard temperatures of 15 °C or 60 °F and for the conversion of crude mass measurements into volume units. 5.3 The application of the density result obtained from this test method, for fiscal or custody transfer accounting calculations, may require measurements of the water and sediment contents obtained on similar specimens of the crude oil parcel.