BS EN ISO 5167-4:2003
用插入圆截面管道中的压差装置测量流体流量.文氏管

Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full. Venturi tubes

被代替

非常抱歉，我们暂时无法提供预览，您可以试试： 免费下载 BS EN ISO 5167-4:2003 前三页，或者稍后再访问。

您也可以尝试购买此标准，
点击右侧 “购买” 按钮开始采购（由第三方提供）。

注意： 点击下载后，生成下载文件时间比较长，请耐心等待......

标准号

BS EN ISO 5167-4:2003

发布

2003年

发布单位

英国标准学会

替代标准

BS EN ISO 5167-4:2022

当前最新

BS EN ISO 5167-4:2022

 

 

被代替标准

98/121142 DC:1998 BS EN ISO 5167-1:1992

适用范围

This part of ISO 5167 specifies the geometry and method of use (installation and operating conditions) of Venturi tubes when they are inserted in a conduit running full to determine the flowrate of the fluid flowing in the conduit. This part of ISO 5167 also provides background information for calculating the flowrate and is applicable in conjunction with the requirements given in ISO 5167-1. This part of ISO 5167 is applicable only to Venturi tubes in which the flow remains subsonic throughout the measuring section and where the fluid can be considered as single-phase. In addition, each of these devices can only be used within specified limits of pipe size, roughness, diameter ratio and Reynolds number. This part of ISO 5167 is not applicable to the measurement of pulsating flow. It does not cover the use of Venturi tubes in pipes sized less than 50 mm or more than 1 200 mm, or where the pipe Reynolds numbers are below 2 × 105. This part of ISO 5167 deals with the three types of classical Venturi tubes: a) cast; b) machined; c) rough welded sheet-iron. A Venturi tube is a device which consists of a convergent inlet connected to a cylindrical throat which is in turn connected to a conical expanding section called the “divergent”. The differences between the values of the uncertainty of the discharge coefficient for the three types of classical Venturi tube show, on the one hand, the number of results available for each type of classical Venturi tube and, on the other hand, the more or less precise definition of the geometric profile. The values are based on data collected many years ago. Venturi nozzles (and other nozzles) are dealt with in ISO 5167-3.

BS EN ISO 5167-4:2003相似标准

推荐