标准摘要
[中文适用范围]： 本文件规定了一种在封闭管道中测定规则流体体积流率的方法，适用于： - 密度基本恒定的流体或马赫数不超过0.25的流体； - 测量截面上滞止温度基本均匀； - 管道内流体充满； - 稳定流动条件。 特别涉及皮托静压管的技术和维护、通过测量的压差计算局部速度以及通过速度积分计算流率。 [外文原描述]： This document specifies a method for the determination in a closed conduit of the volume rate of flow of a regular flow a) of a fluid of substantially constant density or corresponding to a Mach number not exceeding 0,25, b) with substantially uniform stagnation temperature across the measuring cross-section, c) running full in the conduit, and d) under steady flow conditions. In particular, it deals with the technology and maintenance of Pitot static tubes, with the calculation of local velocities from measured differential pressures and with the computation of the flow rate by velocity integration.
英文名称Measurement of fluid flow in closed conduits — Velocity area method using Pitot static tubes