天然气 烃液潜在含量的测定 比重法

[中文适用范围]： 本国际标准描述了在给定压力和温度下测定天然气或类似气体的潜在烃液体含量的两种重量分析方法的原理和一般要求。 本国际标准规定了两种测定样气中冷凝物含量的方法： ——方法 A：手动称重法； ——方法B：基于垂直管内凝结水积聚引起的压力差指示的间接自动称重方法。 手动称重法是间接自动法（方法B）的参考方法。 间接自动方法（方法B）适用于半连续控制。 注：除非另有说明，气体体积均以立方米为单位，压力为 273,15 K 和 101,325 kPa。 [外文原描述]： This International Standard describes the principles of, and general requirements for, two gravimetric methods for the determination of the potential hydrocarbon liquid content of natural gas, or similar gas, at a given pressure and temperature. Two methods are specified in this International Standard to determine the amount of condensate in a sample gas: _ Method A: a manual weighing method; _ Method B: an indirect automatic weighing method based on the indication of the pressure difference caused by the accumulation of condensate in a vertical tube. The manual weighing method is a reference method for the indirect automatic method (Method B). The indirect automatic method (Method B) is suitable for semi-continuous control. NOTE Unless otherwise specified, gas volumes are in cubic metres at 273,15 K and 101,325 kPa.