BS ISO 91:2017是指允许用户转换体积的温度体积修正系数， 在环境条件下测量，以达到交易目的的参考条件下测量。这 文件还提到了校正测量的碳氢化合物体积所需的压缩系数 在平衡压力下，将压力降至相应的体积，用于测量 温度表1显示了本文件中引用的修正系数的定义限值及其相关单位 原油、精炼产品和润滑油文件。这些值以粗体斜体显示。表中还显示了换算为等效单位的限值（如果是密度， 其他基准温度）。表2显示了轻烃校正系数的定义限值 （天然气液体和液化石油气）。交叉引用:ISO 91-2:1991ISO 13443:1996ISO 9770:1989（R10）ISO 91-1:1992ISO/R 91:1970ISO/R 91:1959ISO/R 91:1970/Amd 1:1975ISO 91-1:1982购买本文件时可提供的所有现行修订均包含在购买本文件中。

BS ISO 91:2017 refers to temperature volume correction factors, which allow users to convert volumes, measured at ambient conditions, to those at reference conditions for transactional purposes. This document also refers to compressibility factors required to correct hydrocarbon volumes measured under pressure to the corresponding volumes at the equilibrium pressure for the measured temperature.Table 1 shows the defining limits and their associated units of correction factors referenced in this document for crude oil, refined products and lubricating oils. These values are shown in bold italics.Also shown in the table are the limits converted to their equivalent units (and, in the case of the densities, other base temperatures). Table 2 shows defining limits of correction factors for light hydrocarbons (natural gas liquids and liquefied petroleum gases).Cross References:ISO 91-2:1991ISO 13443:1996ISO 9770:1989 (R10)ISO 91-1:1992ISO/R 91:1970ISO/R 91:1959ISO/R 91:1970/Amd 1:1975ISO 91-1:1982All current amendments available at time of purchase are included with the purchase of this document.