1.1 本标准用于计算苯、甲苯、混合二甲苯、苯乙烯、邻二甲苯、间二甲苯、对二甲苯、异丙苯、乙苯的重量和体积，148.9至176.7 °C和176.7至204.4 °C芳烃和环己烷。给出了一种从观测温度下的观测体积计算给定温度下体积的方法， 吨 摄氏度。 表1 列出了密度 在瓦库 15时 °F和20 °C，用于建立关系的化学品。密度（或重量）“ 真空中 “表示真实密度（或重量），如果在真空中测量，而没有空气作用于液体的浮力效应。它代表了现有产品的实际数量。密度（或重量）“ 在空中 “表示将在标尺上测量的内容。差值约为0.13 %. 现代密度计测量密度 真空中 ASTM建议使用 真空中 密度（或重量）。 1.2 以国际单位表示的数值视为标准值。本标准不包括其他计量单位。 1.2.1 在试验方法中制定了完整的英寸-磅单位配套标准 D1555型 . 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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。 1.4 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====== 3.1 本试验方法适用于计算第节所述产品的重量和体积 1. 本方法中提供的信息可用于确定储罐、运输集装箱等中上述芳烃的数量。

1.1 This standard is for use in calculating the weight and volume of benzene, toluene, mixed xylenes, styrene, ortho-xylene, meta-xylene, para-xylene, cumene, ethylbenzene, 148.9 to 176.7 °C and 176.7 to 204.4 °C aromatic hydrocarbons, and cyclohexane. A method is given for calculating the volume at a given temperature from an observed volume at an observed temperature, t °C. Table 1 lists the density in Vacuo at 15 °F and 20 °C for chemicals used to develop the relationship. Densities (or weights) “ in vacuo ” represent the true density (or weight) if measured in a vacuum without the buoyancy effect of air acting on the liquid. It is representative of the actual amount of product present. Densities (or weights) “ in air ” represent what would be measured on a scale. The difference is on the order of 0.13 %. Modern densitometers measure density in vacuo and the ASTM recommends the use of in vacuo densities (or weights). 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.2.1 A complete inch-pound unit companion standard has been developed in Test Method D1555 . 1.3 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. 1.4 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 ====== 3.1 This test method is suitable for use in calculating weights and volumes of the products outlined in Section 1 . The information presented in this method can be used for determining quantities of the above-stated aromatic hydrocarbons in tanks, shipping containers, etc.