.3.4:2019 同心 方缘孔板流量计 第4部分：背景、发展、实施

[中文适用范围]： 本文件阐述了法兰取压锐缘同心孔板流量系数的方程背景及发展，并推荐了一种流量计算方法。所推荐的方法能在不同起点或终点、以及政府海关或法规所要求的任何计量单位下，针对规定的流体流动条件提供一致的计算结果。该方法使使用不同计算机语言和硬件的多种用户，在使用相同的标准化输入数据时，能够得出几乎相同的计算结果。本文附有勘误表1。 [外文原描述]： Describes the background and development of the equation for the coefficient of discharge of flange-tapped square-edged concentric orifice meters and recommends a flow rate calculation procedure. The recommended procedures provide consistent computational results for the quantification of fluid flow under defined conditions, regardless of the point of origin or destination, or the units of measure required by governmental customs or statute. The procedures allow different users with different computer languages on different computing hardware to arrive at almost identical results using the same standardized input data. Includes Errata 1.