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GB/T 2624.6-2024: Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full - Part 6: Wedge devices
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| GB/T 2624.6-2024 | English | 354 |
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Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full - Part 6: Wedge devices
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GB/T 2624.6-2024
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Basic data | Standard ID | GB/T 2624.6-2024 (GB/T2624.6-2024) | | Description (Translated English) | Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full - Part 6: Wedge devices | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | N12 | | Classification of International Standard | 17.120.10 | | Word Count Estimation | 18,187 | | Date of Issue | 2024-09-29 | | Date of Implementation | 2025-04-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 2624.6-2024: Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full - Part 6: Wedge devices
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ICS 17.120.10
CCSN12
National Standard of the People's Republic of China
Measurement with a differential pressure device installed in a circular cross-section pipe
Full pipe flow rate of fluids Part 6.Wedge devices
Part 6.Wedgemeters, IDT)
Released on 2024-09-29
2025-04-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface III
Introduction IV
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Measurement principles and calculation methods 2
5 Wedge device 3
5.1 Scope of application 3
5.2 General shape 3
5.3 Materials and manufacturing 4
5.4 Pressure tapping port 5
5.5 Outflow coefficient C 5
5.6 Expansion coefficient ε 5
5.7 Uncertainty of the outflow coefficient C 6
5.8 Uncertainty of the expandability (expansion) coefficient ε 6
5.9 Pressure loss 6
6 Installation Requirements 6
6.1 General 6
6.2 Shortest upstream and downstream straight pipe sections between various pipe fittings and wedges
6.3 Additional special installation requirements for wedge-shaped devices 7
7 Real-flow calibration of the wedge device 7
7.1 General 7
7.2 Test equipment 8
7.3 Installation of the wedge device 8
7.4 Design of test plan 8
7.5 Reporting of calibration results 8
7.6 Uncertainty analysis of calibration results 8
Appendix A (Informative) Expansion Coefficient Table 10
Appendix B (Informative) Use of Kd2 Parameter 11
Reference 12
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document is Part 6 of GB/T 2624 "Measurement of flow rate of fluid in full pipe by using a differential pressure device installed in a circular cross-section pipe".
GB/T 2624 has published the following parts.
--- Part 1.General principles and requirements;
--- Part 2.Orifice plates;
--- Part 3.Nozzles and Venturi nozzles;
--- Part 4.Venturi tube;
--- Part 5.Conical devices;
--- Part 6.Wedge devices.
This document is equivalent to ISO 5167-6.2022 "Measurement of flow rate of fluids in full pipes by differential pressure devices installed in circular cross-section pipes Part 6
Part. Wedge Flow Meter.
The following minimal editorial changes were made to this document.
--- In order to coordinate with the existing standards, the name of the standard is changed to "Measurement of the flow rate of a full pipe by a differential pressure device installed in a circular cross-section pipe"
Part 6.Wedge devices;
--- For ease of use, relevant notes are added to the text (see 5.2.1, 5.4.6, 5.5.1, 5.6);
--- For ease of use, a header is added (see 6.2).
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed by the China Machinery Industry Federation.
This document is under the jurisdiction of the National Industrial Process Measurement, Control and Automation Standardization Technical Committee (SAC/TC124).
This document was drafted by. Shanghai Industrial Automation Instrumentation Research Institute Co., Ltd., Shanghai Instrument and Control System Inspection and Testing Co., Ltd.
Qingdao Metrology Technology Research Institute, Tianjin University, Zhejiang Metrology Science Research Institute, Jiangsu Metrology Science Research Institute, Cangnan Automation Instrument
Meter Factory, Jiangyin Throttling Device Factory Co., Ltd., Tianxin Instrument Group Co., Ltd., Tianjin Yihuan Automation Instrument Technology Co., Ltd., Dandong
Tongbo Electric (Group) Co., Ltd., Kaifeng Instrument Co., Ltd., Yinchuan Rongshenwei Automation Instrument Factory (Co., Ltd.), Yantai Standard Metrology
Inspection and Testing Center, Jiangsu Yokogawa Group Co., Ltd., Xi'an Ansen Intelligent Instrument Co., Ltd., Jiangsu Jack Instrument Co., Ltd., Jiangsu
Huaxia Instrument Co., Ltd., Jiangsu Xinhui Measurement and Control Technology Co., Ltd., Jiangsu Suyi Group Co., Ltd., Ruida Group Co., Ltd., Jiangsu Huaer
Wei Technology Group Co., Ltd., Shanghai Fuling Automation Control System Co., Ltd., Zhejiang Aoxin Instrument Co., Ltd., Yantai Huahui Instrument
Ltd.
The main drafters of this document are. Sun Yuxin, Guo Aihua, Xiao Honglian, Guo Shenhui, Xu Ying, Chen Shangshun, Cao Jiuying, Shangguan Zongjian, Yan Yongfeng, Chen Tongcai,
Liu Yang, Guo Yonggang, Zhang Jianyong, Tang Linan, Xu Wenda, Liu Yuzhong, Yuan Chao, Wang Shixing, Min Xinyi, Yang Shaohua, Wang Yuxiang, Liu Liang, Weng Deping,
Chen Xuezhong, Zhu Xunhua, Bai Fan, Cui Yuqiang.
Introduction
GB/T 2624 consists of six parts, covering the installation of orifice plates, nozzles, venturi tubes, cone devices and wedge devices in full pipes.
When measuring fluid flow, its geometric dimensions and usage (installation and working conditions) are also given, as well as the methods for calculating flow and its corresponding uncertainty.
Necessary information for determination.
GB/T 2624 (all parts) is only applicable to the case where the fluid maintains subsonic flow throughout the measurement section and can be considered as a single-phase flow.
In addition, each device can only be used within the specified pipe size and Reynolds number range.
GB/T 2624 (all parts) applies to devices that have undergone direct calibration experiments, the number, scope and quality of which are sufficient to enable the relevant
The application system can be based on experimental results and coefficients, and the coefficients given are also within a certain predictable uncertainty range.
A wider range of pipe sizes, diameter ratios β [formula (2)] and Reynolds numbers can be considered using the wedge arrangement calibrated in accordance with Chapter 7.
The device installed in the pipeline is called "primary device". "Primary device" also includes the pressure tapping. All other necessary for convenient flow meter reading
The other instruments or devices are called "secondary devices". The flow computer that receives these readings and executes the algorithm is called the "tertiary device".
GB/T 2624 (all parts) mainly deals with primary devices, with only occasional mention of secondary devices (see ISO 2186) and tertiary devices.
GB/T 2624 "Measurement of full pipe flow rate using a differential pressure device installed in a circular cross-section pipe" consists of six parts.
--- Part 1.General principles and requirements. Aims to give general terms and definitions, symbols, principles and calculation methods, measurement, installation and
General requirements for methods of determining flow measurement uncertainty and the pipe sizes and Reynolds numbers for which these differential pressure devices are applicable
scope.
--- Part 2.Orifice plates. Aims to give the geometric dimensions and usage of orifice plates. Orifice plates can be used with flange pressure ports, corner pressure ports,
For use with pressure ports D, D and D/2.
--- Part 3.Nozzles and Venturi nozzles. This part aims to give the geometric dimensions and usage of nozzles and Venturi nozzles, and involves ISA
1932 nozzle, long diameter nozzle and venturi nozzle.
--- Part 4.Venturi tube. Aims to give the geometric dimensions and usage of the Venturi tube, involving cast, machined and
There are three types of classic venturi tubes. rough welded iron plate type.
--- Part 5.Conical device. Aims to give the geometric dimensions and use of the conical device, used in conjunction with GB/T 2624.1.
The cone device has one or more upstream pipe wall pressure tapping ports and a downstream pressure tapping port located at the tail of the cone.
The pressure pipe is connected from the inside of the cone to the cone support structure, and then passes upward through the support structure to be connected to the differential pressure transmitter.
--- Part 6.Wedge device. Aims to give the geometric dimensions and use of the wedge device, used in conjunction with GB/T 2624.1.
The primary device of the wedge device consists of a wedge-shaped throttling piece with specific geometric dimensions.
GB/T 2624 (all parts) does not cover safety aspects. It is the user's responsibility to ensure that the system complies with applicable safety regulations.
Measurement with a differential pressure device installed in a circular cross-section pipe
Full pipe flow rate of fluids Part 6.Wedge devices
1 Scope
This document specifies the geometric dimensions and method of use of wedge-shaped devices installed in pipelines to measure the flow rate of fluids in full pipes (installation and operation).
condition).
Note 1.For specific application scenarios, the uncertainty of an uncalibrated wedge device is difficult to predict, so it is necessary to conduct a real flow test in accordance with the provisions of Chapter 7.
calibration.
This document specifies calibration requirements and, if applicable, may be used over a calibrated Reynolds number range.
It also provides guidance for the calibration of similar flow meters.
This document also provides relevant information for calculating flow rates and for use with the requirements of ISO 5167-1.2022.
This document applies only to wedge devices where the flow is subsonic and single-phase throughout the measuring section.
The device can only be used within the specified range of pipe size, pipe surface roughness, β [given by formula (2)] (or wedge ratio) and Reynolds number.
This document does not apply to the measurement of pulsating flows. This document does not cover uncalibrated wedge devices with an inner diameter less than 50 mm or greater than 600 mm, or
Use in pipelines with a pipeline Reynolds number (ReD) less than 1×104.
NOTE 2 The primary device of a wedge-shaped device consists of a wedge-shaped throttling piece of specific geometry. Other types of wedge-shaped devices exist but at the time of preparation of this document
There are not enough data to fully characterize these devices, so they are calibrated with real flow as described in Chapter 7.
2 Normative references
The contents of the following documents constitute essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
Note. GB/T 17611-1998 Measurement terms and symbols for fluid flow in closed pipes (idtISO 4006.1991)
ISO 5167-1.2022 Measurement of full flow rate of fluids by differential pressure devices installed in circular cross-section pipes - Part 1.General principles
Note. GB/T 2624.1-2006 Measurement of full pipe flow rate using differential pressure devices installed in circular cross-section pipes Part 1.General principles and requirements
(ISO 5167-1.2003,IDT)
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in ISO 4006, ISO 5167-1.2022 and the following apply.
The terminology databases used for standardization maintained by ISO and IEC are located at.
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