1.1 甲烷的热物理性质表用于计算过程设计和操作中甲烷的压力-体积-温度（PVT）、热力学和传输性质。提供了三个温度在90 K和600之间的气态和液态甲烷表 K，压力为30MPa。两个表提供了液-汽平衡时液相和汽相的性质（饱和性质）。第三个表提供了选定的属性 t ， p 在这些条件下的平衡相的点。这些表格是由美国国家标准与技术研究所根据标准参考数据库产品REFPROP 10.0版本开发的 2. 。 1.2 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。

1.1 The thermophysical property tables for methane are for use in the calculation of the pressure-volume-temperature (PVT), thermodynamic, and transport properties of methane for process design and operations. Three tables are provided for gaseous and liquid methane at temperatures between 90 K and 600 K at pressures to 30 MPa. Two tables provide properties for the liquid and vapor phases at liquid-vapor equilibrium (saturation properties). The third table provides properties at selected T , p points for the equilibrium phase at those conditions. The tables were developed by the National Institute of Standards and Technology from a Standard Reference Database product REFPROP, version 10.0 2 . 1.2 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.