本文件规定了楔形流量计插入满管时的几何形状和使用方法（安装和操作条件），以确定管道中流体的流速。注1:由于未校准楔形流量计的不确定度对于特定应用来说可能太大，因此可以认为根据第7条校准流量计是必要的。本文件给出了在标定雷诺数范围内使用的标定要求。第7条也可作为类似设计但不在本文件范围内的仪表校准的有用指南。它还提供了计算流量的背景信息，并与ISO 5167-1中给出的要求一起适用。本文件仅适用于楔形流量计，其中流量在整个测量段内保持亚音速，且流体可视为单相。未校准的楔形流量计只能在规定的管道尺寸、粗糙度、β（或楔形比）和雷诺数范围内使用。不适用于脉动流量的测量。它不包括在内径小于50 mm或大于600 mm或管道雷诺数小于1×104的管道中使用未校准的楔形流量计。注2:楔形流量计有一个主要元件，该元件由特定几何形状的楔形限制组成。楔形流量计的替代设计是可用的；但是，在编写本报告时，没有足够的数据来充分描述这些装置，因此，这些流量计根据第7条进行校准。

This document specifies the geometry and method of use (installation and operating conditions) of wedge meters when they are inserted in a conduit running full to determine the flow rate of the fluid flowing in the conduit. NOTE 1 As the uncertainty of an uncalibrated wedge meter can be too large for a particular application, it could be deemed essential to calibrate the flow meter according to Clause 7. This document gives requirements for calibration which, if applied, are for use over the calibrated Reynolds number range. Clause 7 could also be useful guidance for calibration of meters of similar design but which fall outside the scope of this document. It also provides background information for calculating the flow rate and is applicable in conjunction with the requirements given in ISO 5167‑1. This document is applicable only to wedge meters in which the flow remains subsonic throughout the measuring section and where the fluid can be considered as single-phase. Uncalibrated wedge meters can only be used within specified limits of pipe size, roughness, beta (or wedge ratio) and Reynolds number. It is not applicable to the measurement of pulsating flow. It does not cover the use of uncalibrated wedge meters in pipes whose internal diameter is less than 50 mm or more than 600 mm, or where the pipe Reynolds numbers are below 1 × 104. NOTE 2 A wedge meter has a primary element which consists of a wedge-shaped restriction of a specific geometry. Alternative designs of wedge meters are available; however, at the time of writing there is insufficient data to fully characterize these devices, and therefore these meters are calibrated in accordance with Clause 7.