液态烃.用容积置换仪表测量体积

[中文适用范围]： 本文件描述并讨论了位移流量计的特性。 注意容积式流量计应用于液体计量时需要考虑的因素。 这些包括待计量液体的特性和性质、仪表的正确安装和操作、环境影响以及二次和辅助设备的广泛选择。 还讨论了仪表检验和维护方面的问题。 本文件适用于任何适当液体的计量。 给出了关于在计量同一相的双组分混合物（例如水和油）中使用容积式流量计的指南。 它不适用于计量条件下存在气体或固体时的两相流（即两相流）。 它可以应用于工业中遇到的多种液体，仅用于液体计量。 它不限于碳氢化合物。 概述了碳氢化合物财政/托管转移申请的预期绩效指南。 本文件不适用于液化天然气（LNG）和冷冻石油气等低温液体。 它不包括饮用水和加油机应用。 [外文原描述]： ISO 2714:2017 describes and discusses the characteristics of displacement flowmeters. Attention is given to the factors to be considered in the application of positive displacement meters to liquid metering. These include the properties and nature of the liquid to be metered, the correct installation and operation of the meter, environmental effects, and the wide choice of secondary and ancillary equipment. Aspects of meter proving and maintenance are also discussed. ISO 2714:2017 is applicable to the metering of any appropriate liquid. Guidance is given on the use of positive displacement meters in the metering of two-component mixtures of the same phase such as water and oil. It is not applicable to two-phase flow when gases or solids are present under metering conditions (i.e. two-phase flow). It can be applied to the many and varied liquids encountered in industry for liquid metering only. It is not restricted to hydrocarbons. Guidance on the performance expected for fiscal/custody transfer applications for hydrocarbons is outlined. ISO 2714:2017 is not applicable to cryogenic liquids such as liquefied natural gas (LNG) and refrigerated petroleum gas. It does not cover potable water and fuel dispenser applications.