标准编号：ISO 5167-6:2019
中文名称：用压差装置测量管道循环交叉液体流量 第6部分：计量楔米
英文名称：Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full — Part 6: Wedge meters
发布日期：2019-02
标准范围
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.
立即下载标准文件