BS EN ISO 5167-3-2003 用插入圆截面管道中的压差装置测量流体流量.喷嘴和文氏喷嘴

标准号：BS EN ISO 5167-3-2003
中文标准名称：用插入圆截面管道中的压差装置测量流体流量.喷嘴和文氏喷嘴
英文标准名称：Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full. Nozzles and Venturi nozzles
标准类型：A42
发布日期：2003/3/18 12:00:00
实施日期：2003/3/18 12:00:00
中国标准分类号：A42
国际标准分类号：17.120.10
适用范围：This part of ISO 5167 specifies the geometry and method of use (installation and operating conditions) ofnozzles and Venturi nozzles when they are inserted in a conduit running full to determine the flowrate of thefluid flowing in the conduit.This part of ISO 5167 also provides background information for calculating the flowrate and is applicable inconjunction with the requirements given in ISO 5167-1.This part of ISO 5167 is applicable to nozzles and Venturi nozzles in which the flow remains subsonicthroughout the measuring section and where the fluid can be considered as single-phase. In addition, each ofthe devices can only be used within specified limits of pipe size and Reynolds number. It is not applicable tothe measurement of pulsating flow. It does not cover the use of nozzles and Venturi nozzles in pipe sizes lessthan 50 mm or more than 630 mm, or where the pipe Reynolds numbers are below 10 000.This part of ISO 5167 deals witha) two types of standard nozzles:1) the ISA5) 1932 nozzle;2) the long radius nozzle6);b) the Venturi nozzle.The two types of standard nozzle are fundamentally different and are described separately in this part ofISO 5167. The Venturi nozzle has the same upstream face as the ISA 1932 nozzle, but has a divergentsection and, therefore, a different location for the downstream pressure tappings, and is described separately.This design has a lower pressure loss than a similar nozzle. For both of these nozzles and for the Venturinozzle direct calibration experiments have been made, sufficient in number, spread and quality to enablecoherent systems of application to be based on their results and coefficients to be given with certainpredictable limits of uncertainty.