GB/T 18659-2023 English PDFUS$534.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 18659-2023: Measurement of fluid flow in closed conduits - Guidance for the use of electromagnetic flowmeters Status: Valid GB/T 18659: Historical versions
Basic dataStandard ID: GB/T 18659-2023 (GB/T18659-2023)Description (Translated English): Measurement of fluid flow in closed conduits - Guidance for the use of electromagnetic flowmeters Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: N12 Classification of International Standard: 17.120.10 Word Count Estimation: 30,318 Date of Issue: 2023-08-06 Date of Implementation: 2024-03-01 Older Standard (superseded by this standard): GB/T 18659-2002,GB/T 18660-2002,GB/T 20729-2006 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 18659-2023: Measurement of fluid flow in closed conduits - Guidance for the use of electromagnetic flowmeters---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. ICS 17.120.10 CCSN12 National Standards of People's Republic of China Replace GB/T 18659-2002, GB/T 18660-2002, GB/T 20729-2006 Measurement of fluid flow in closed pipes Electromagnetic flowmeter user guide Published on 2023-08-06 2024-03-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee Table of contentsPreface III 1 Scope 1 2 Normative reference documents 1 3 Terms and Definitions 1 4 symbols 3 5 Theory and Basic Formulas 4 6 Structure and working principle 4 6.1 Overview 4 6.2 Sensor 5 6.3 Transmitter 6 6.4 Flow meter/transmitter output 8 7 Equipment Mark 8 7.1 Recommended information 8 8 Installation design and implementation9 8.1 Sensor 9 8.2 Transmitter location13 8.3 Operation Precautions 14 9 Calibration, validation and verification of flow meters14 9.1 Calibration of flow meter (manufacturer’s specification) 14 9.2 Verification of flow meter (on-site electronic verification) 14 10 Flowmeter performance evaluation15 10.1 General requirements15 10.2 Applications within the scope of other standards15 11 Uncertainty Analysis 15 Appendix A (informative) Sensor structural materials 16 Appendix B (Informative) Practical Application Notes on AC and DC Excitation Measurement Systems 18 Appendix C (Informative) Cathodic Protection 19 Appendix D (informative) Conversion of nominal diameter between metric units and American units 20 Appendix E (Informative) Manufacturer’s Accuracy Specifications 21 Reference 24ForewordThis document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. This document replaces GB/T 18660-2002 "Method of use of electromagnetic flowmeter for measuring conductive liquid flow in closed pipelines", GB/T 18659-2002 "Performance Evaluation Method of Electromagnetic Flowmeters for Measuring Conductive Liquid Flow in Closed Pipes", GB/T 20729- 2006 "Total length of flange-mounted electromagnetic flowmeter for measuring conductive liquid flow in closed pipelines". This document is based on GB/T 18660- It mainly contains the content of.2002 and integrates the content of GB/T 18659-2002 and GB/T 20729-2006.With GB/T 18660-2002 In comparison, in addition to structural adjustments and editorial changes, the main technical changes are as follows. ---Some symbols have been changed (see Chapter 4, Chapter 4 of GB/T 18660-2002); ---Changed the functions implemented by the transmitter (see 6.3.1, 6.3 of GB/T 18660-2002); ---Changed the output form of the flow meter/transmitter (see 6.4, 6.4 of GB/T 18660-2002); ---Added the installation conditions for sensors buried underground and sensors submerged in water (see 8.1.2.6, 8.1.2.7); ---Changed the recommended maximum cone angle for small-angle tapered pipes (see 8.1.5.4, 7.1.3.3 of GB/T 18660-2002); ---Deleted the power factor (see 7.1.4.2 of GB/T 18660-2002); ---Deleted the content about sensor cleaning and maintenance (see 7.1.5 of GB/T 18660-2002); ---Added the content of flange connection installation dimensions (see 8.1.6); ---Added the content of flow meter verification (on-site electronic verification) (see 9.2); ---Added the content of flow meter performance evaluation (see Chapter 10); ---Changed the relevant content of uncertainty analysis (see Chapter 11, Chapter 10 of GB/T 18660-2002). This document is equivalent to ISO 20456.2017 "Guidelines for the use of electromagnetic flowmeters for measuring fluid flow in closed pipes for conductive liquids" South". This document has made the following minimal editorial changes. ---In order to coordinate with existing standards, the name of the standard is changed to "Guidelines for the use of electromagnetic flowmeters for measuring fluid flow in closed pipes"; ---Change the volume flow rate q in equation (3) to equation (5) to qv; ---Corrected the error in ISO 20456.2017, correcting "6.3.1" in B.1 to "6.3.2". Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents. This document is proposed by 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 Instrument Research Institute Co., Ltd., Xi'an Ansen Intelligent Instrument Co., Ltd., Beijing Rui Pusanyuan Measurement and Installation Technology Co., Ltd., Kaifeng Instrument Co., Ltd., Ningbo Water Meter (Group) Co., Ltd., Endresshaus (China) Automatic Chemical Co., Ltd., Tianxin Instrument Group Co., Ltd., Hebei Institute of Metrology Supervision and Inspection, Jiangsu Institute of Metrology, Yuyao Yinhuan Flow Co., Ltd., Shenzhen Wanxun Automatic Control Co., Ltd., Hebei Xiong'an Changhe Technology Co., Ltd., Dandong Tongbo Electrical Appliance (Group) Co., Ltd. Division, Beijing Institute of Metrology and Testing Sciences, Fujian Shunchang Hongrun Precision Instrument Co., Ltd., Beijing Fisherport Technology Development Co., Ltd., Hangzhou Zhou Pangu Automation System Co., Ltd., Qingdao Automation Instrument Co., Ltd., Beijing Ruipu Sanyuan Instrument Co., Ltd., Shanghai Xipai Automatic Chemical Technology Co., Ltd., Jiangsu Jack Instrument Co., Ltd., Jiangsu Huaxia Instrument Co., Ltd., Shanghai Jinxiang Instrument Technology Co., Ltd., Beijing Yuan Dong Instrument Co., Ltd., Sinopec Zhongyuan Petroleum Engineering Design Co., Ltd., Bitopa Technology Co., Ltd., Jiangsu Hongguang Instrument Factory Co., Ltd. Company, Zhejiang Aoxin Instrument Co., Ltd., Shandong Freede Measurement and Control System Co., Ltd., Jiangsu Xinhui Measurement and Control Technology Co., Ltd. The main drafters of this document. Xiao Honglian, Wang Shixing, Li Zhenzhong, Jin Wenzhe, Yao Ling, Zhao Jinming, Tao Chaojian, Wu Lei, Cao Jiuying, Zhu Jiashun, Li Minghua, Zou Jing, Zhang Liangliang, Guo Yonggang, Yang Youtao, Sun Yuxin, Chen Zhiyang, Wang Yuesheng, Zheng Mingdu, Yang Weishan, Zhang Jinhua, Wang Jizhong, Min Xinyi, Sun Jianyu, Wang Xin, Deng Jun, Zhu Weining, Yang Peng, Li Yingwei, Wang Zhonghui, Cui Shanchao, Fan Shujin, Si Shuyi, Lu Xinyu. Previous versions of the documents replaced by this document. ---GB/T 18660-2002, GB/T 18659-2002, GB/T 20729-2006. Measurement of fluid flow in closed pipes Electromagnetic flowmeter user guide1 ScopeThis document applies to industrial electromagnetic flowmeters that measure conductive liquid flow in closed full pipes. This document covers the adoption of AC (AC) and Electromagnetic flow meters with two excitation forms of pulsed direct current (DC) and electromagnetic flow meters powered by main power supply, battery power or other power sources Quantity meter. This document does not apply to insertion electromagnetic flowmeters, electromagnetic flowmeters used in open channels or partially filled pipes, nor to the measurement of ferromagnetic slurries. Or electromagnetic flowmeter for liquid metal. This document does not specify safety requirements for the use of electromagnetic flowmeters in hazardous environments.2 Normative reference documentsThis document has no normative references.3 Terms and definitionsThe following terms and definitions apply to this document. ISO and IEC maintain standardized terminology databases at. 3.1 Generate a magnetic field perpendicular to the flow direction, and use the induced voltage Uv generated by the conductive fluid flowing in the magnetic field to derive the flow rate of flow meter. Note. The electromagnetic flowmeter consists of a sensor (3.2) and a transmitter (3.3). 3.2 sensor sensor Devices including at least the following units. ---A section of electrically insulated measuring tube through which the conductive liquid to be measured flows; ---A pair of electrodes that measure the signal generated by the flow of conductive liquid; ---An electromagnet that generates a magnetic field in the measuring tube (3.4). Note 1.The sensor produces a signal proportional to the flow rate and sometimes a reference signal (3.9), see 6.2. Note 2.The terms primary device or flow measuring tube have previously been used to refer to sensors. Note 3.In some cases, other electrodes are also used, such as ground electrodes and full pipe detection electrodes (empty pipe detection), see 3.5. 3.3 transmittertransmitter Contains circuitry to drive the excitation coil and extract the flow signal. ...... |
