标准摘要
[中文适用范围]： 适用范围：本文件为通过同心、直角边缘、法兰取孔板式流量计的流量计算提供单一参考，涵盖工程公式、不确定度估算、施工与安装要求以及标准化实施建议。文中同时采用美国习惯单位（USC）和国际单位制（SI）。内容讨论了质量流量方程及基准（或标准）体积流量方程，并列出求解流量方程所需的各项参数；同时给出了流量系数与膨胀系数的经验公式。本次修订版对法兰取孔板式流量计的膨胀系数经验计算公式进行了更新。 [外文原描述]： Provides a single reference for engineering equations, uncertainty estimations, construction and installation requirements, and standardized implementation recommendations for the calculation of flow rate through concentric, square-edged, flange-tapped orifice meters. Both U.S. customary (USC), and international system of units (SI) units are included. The mass flow rate and base (or standard) volumetric flow rate equations are discussed, along with the terms required for solution of the flow equation. The empirical equations for the coefficient of discharge and expansion factor are also presented. This revision includes a change to the empirical expansion factor calculation for flange-tapped orifice meters.
英文名称Concentric, Square-Edged Orifice Meters, Part 1—General Equations and Uncertainty Guidelines (includes Errata dated July 2013) (ANSI/API MPMS 14.3.1) (AGA Report No. 3, Part 1)