.2.5:2020 商业天然气液体的简化蒸汽压关联式

[中文适用范围]： 用于计算压力影响校正因子的方法（例如第11.2.1-1984章，现已由第11.1-2004章取代；以及第11.2.2-1986章）需要获知实测条件下的平衡泡点压力（即蒸气压）。然而，工艺液体的蒸气压通常并未实际测量。虽然蒸气压也可根据组分信息计算得出，但天然气液体（NGLs）的组分数据并非总能获取。因此，有必要建立一种基于常规实测性质的天然气液体蒸气压关联式，相关内容已收录于本出版物中。 [外文原描述]： Methods used for calculation of the correction factor for pressure effects such as Chapter 11.2.1-1984 (now superseded by Chapter 11.1-2004) and Chapter 11.2.2-1986 require knowledge of the equilibrium bubble point pressure (vapor pressure) at the measured conditions. However, the vapor pressure of the process liquid is generally not measured. The vapor pressure can also be calculated form compositional information, but the composition is not always measured for natural gas liquids (NGLs). Therefore, a correlation for the vapor pressure of NGLs is based upon normally measured properties is required and is documented in this publication.