标准编号：ISO 5167-5:2016
中文名称：用压差装置测量管道循环交叉液体流量 第5部分：计量锥米
英文名称：Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full — Part 5: Cone meters
发布日期：2016-03
标准范围
This part of ISO 5167 specifies the geometry and method of use (installation and operating conditions)of cone meters when they are inserted in a conduit running full to determine the flow rate of the fluidflowing in the conduit.As the uncertainty of an uncalibrated cone meter might be too high for a particular application, it mightbe deemed essential to calibrate the flow meter in accordance with Clause 7.This part of ISO 5167 also provides background information for calculating the flow rate and isapplicable in conjunction with the requirements given in ISO 5167-1.This part of ISO 5167 is applicable only to cone meters in which the flow remains subsonic throughoutthe measuring section and where the fluid can be considered as single-phase. Uncalibrated cone meterscan only be used within specified limits of pipe size, roughness, β, and Reynolds number. This part ofISO 5167 is not applicable to the measurement of pulsating flow. It does not cover the use of uncalibratedcone meters in pipes sized less than 50 mm or more than 500 mm, or where the pipe Reynolds numbersare below 8 × 104 or greater than 1,2 × 107.A cone meter is a primary device which consists of a cone-shaped restriction held concentrically in thecentre of the pipe with the nose of the cone upstream. The design of cone meter defined in this part ofISO 5167 has one or more upstream pressure tappings in the wall, and a downstream pressure tappingpositioned in the back face of the cone with the connection to a differential pressure transmitter beinga hole through the cone to the support bar, and then up through the support bar.Alternative designs of cone meters are available; however, at the time of writing, there is insufficientdata to fully characterize these devices, and therefore, these meters shall be calibrated in accordancewith Clause 7.
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