本国际标准描述了一种基于各液化石油气组分的成分数据、密度和蒸气压系数计算液化石油气（LPG）密度和蒸气压的简化方法。本国际标准中提供了一系列因素。本方法适用于产品质量规范，不适用于保管转移中的数量测量（见ISO 6578）。交叉引用:ISO 7941ISO 6578:1991（R10）ISO 3993:1984（R08）ISO 4256:1996包含以下内容:修订，2020年4月

This International Standard describes a simplified method for the calculation of density and vapour pressure of liquefied petroleum gases (LPG) based on compositional data and density and vapour pressure factors for individual LPG components. A list of factors is provided in this International Standard. This method is intended for application in specifications of product quality and is not intended for application to quantity measurement in custody transfer (see ISO 6578).Cross References:ISO 7941ISO 6578:1991 (R10)ISO 3993:1984 (R08)ISO 4256:1996Incorporates the following:Amendment, April 2020