GB/T 34041.2-2017 English PDFUS$759.00 · In stock
Delivery: <= 6 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 34041.2-2017: Measurement of fluid flow in closed conduits -- Ultrasonic meters for gas -- Part 2: Meters for industrial applications Status: Valid
Basic dataStandard ID: GB/T 34041.2-2017 (GB/T34041.2-2017)Description (Translated English): Measurement of fluid flow in closed conduits -- Ultrasonic meters for gas -- Part 2: Meters for industrial applications Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: N12 Classification of International Standard: 17.120.10 Word Count Estimation: 38,316 Date of Issue: 2017-09-07 Date of Implementation: 2018-04-01 Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China GB/T 34041.2-2017: Measurement of fluid flow in closed conduits -- Ultrasonic meters for gas -- Part 2: Meters for industrial applications---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. Measurement of fluid flow in closed conduits - Ultrasonic meters for gas - Part 2. Meters for industrial applications ICS 17.120.10 N12 National Standards of People's Republic of China Measurement of Fluid Flow in Closed Pipes Gas ultrasonic flowmeter Part 2. Ultrasonic flowmeters for industrial measurement Part 2.Metersforindustrialapplications (ISO 17089-2.2012, IDT) 2017-09-07 Posted 2018-04-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released Directory Foreword Ⅲ Introduction IV 1 Scope 1 2 Normative references 1 3 Terms, definitions, symbols and abbreviations 1 3.1 Terms and definitions 1 3.2 Symbols and subscripts 5 3.3 Abbreviations 6 4 measurement principle 7 4.1 transit time ultrasonic flowmeter 7 4.2 flare gas or air flow meter 8 4.3 Factors Affecting Performance 8 4.4 Description of basic types 8 4.5 pressure and temperature on the flowmeter geometry 12 4.6 Flowmeter to determine the uncertainty of measurement 12 4.7 Flowmeter classification 12 5 flowmeter features 13 5.1 Performance Indicators 13 5.2 Working conditions 13 5.3 Body, material and structure 14 5.4 Connector 14 5.5 size 14 5.6 Ultrasound transducer port 14 5.7 pressure port 14 5.8 Anti-roll measures 14 5.9 Flow Regulator 14 5.10 logo 15 5.11 Transducer 15 5.12 Electronic unit 15 5.13 Firmware and Software 16 5.14 inspection and verification function 16 5.15 Operation and Installation Requirements 17 5.16 Installation Requirements and Flow Profile Precautions 18 5.17 Handling and Transportation 19 6 Test and Calibration 19 6.1 Flow test and calibration 19 6.2 static leak test and pressure test 20 6.3 Size measurement method 20 6.4 Dynamic test (flow conditions of the test, calibration and adjustment) 21 6.5 flowmeter diagnostic function 22 6.6 Site Testing 23 Appendix A (Normative) Special application note on control valve characteristics and noise 25 References 32 ForewordGB/T 34041 "closed pipe fluid flow measurement gas ultrasonic flowmeter" is divided into two parts. --- Part 1. Trade transfer and sub-transmission measurement gas ultrasonic flowmeter; --- Part 2. Industrial measurement of gas ultrasonic flowmeter. This section GB/T 34041 Part 2. This section drafted in accordance with GB/T 1.1-2009 given rules. This section uses the translation method identical with ISO 17089-2.2012 "closed pipe fluid flow measurement gas ultrasonic flowmeter Part 2. Industrial ultrasonic gas flowmeter measurement. " The documents of our country that are consistent with the corresponding international documents quoted in this part are as follows. --- GB/T 17611-1998 Measurement of fluid flow in closed conduits Terms and symbols (idtISO 4006.1991) This section also made the following editorial changes. --- Delete the note in the scope of "national regulations or other regulations may be more stringent than the provisions of this section." Considered in international standards To the actual situation in different countries may be some countries laws and regulations may be higher than the standard requirements, this situation does not exist in our country In, so delete. --- 5.4 informative reference example "such as ANSI/ASME (class300,600,900, etc.)" to "such as GB/T 9115- 2010, GB/T 9119-2010 and so on. " This part is proposed by China Machinery Industry Federation. This part of the National Industrial Process Measurement Control and Automation Standardization Technical Committee (SAC/TC124) centralized. This section is drafted unit. Shanghai Institute of Industrial Automation Instruments, Beijing Institute of Metrology, Beijing Ruipu ternary instruments have Co., Ltd., Beijing Chang-Min Technology Co., Ltd., Zhejiang Cangnan Instrument Group Co., Ltd., Tianxin Instrument Group Co., Ltd. Shanghai a promise instrument Limited, Liaoning Sikai Technology Co., Ltd., Tianjin billion Central Automation Instrumentation Technology Co., Ltd., Dandong Tongbo Electric (Group) Co., Ltd. Company, Shanghai Nuclear Veritas Instrument Co., Ltd., Beijing Jia Jieneng Technology Co., Ltd., Shanghai Elster - Emerson Gas Equipment Co., Ltd. the company. The main drafters of this section. Li Minghua, Guo Aihua, Yang You Tao, Li Zhenzhong, Puqi Hwan, Zhang Shengyi, Li Xiao Ping, Jiang Chao, Zhang Wei, Xing Dehui, Xing Li Chao, Zhu Qi, Yi Huayong, Wang Yong.IntroductionSince.2000, an ultrasonic flowmeter (USM) that measures gas flow has rapidly entered the flowmeter market, becoming an industrial application and trade Easy to transfer and sub-meter measurement of the mainstream flowmeter. Ultrasonic flowmeter in addition to high repeatability and high accuracy, but also has a pressure loss Very small, large range, you can measure the characteristics of pulsatile flow. Ultrasonic flowmeters provide extended diagnostic information that not only verifies the performance of the ultrasonic flowmeter but also validates the system Other features such as gas chromatographs, pressure transmitters, and temperature transmitters. Given the expanded diagnostic capabilities of ultrasonic flowmeters, This section advocates the addition and use of automatic diagnosis instead of cumbersome manual quality inspection. This section focuses on industrial measurement with gas ultrasonic flowmeter (Class 3 and Class 4). Custody transfer and sub-measurement of gas ultrasonic flow Meter is the subject of GB/T 34041.1. Typical performance elements of the classification scheme are as follows. Category Typical Applications Typical Uncertainty a Relevant documents 1 Custody transfer < 0.7% GB/T 34041.1 2 points less than the amount of 1.5% GB/T 34041.1 3 utilities and process measurement qV > qV, t.1.5% ~ 5% b This section 4 flare gas and air measurement qV > qV, t.5% ~ 10% of this section a flowmeter performance, including the maximum allowable error flowmeter, repeatability, resolution and maximum peak error, etc., depending on the pipe diameter, channel length, sound Channel number, gas composition and speed of sound, as well as the flow meter timing repeatability and many other factors. b With a specific flow adjustment, or with a multi-channel flowmeter, lower uncertainties can be achieved. The special application instructions in Chapter 7 and the information in parentheses are informative. Measurement of Fluid Flow in Closed Pipes Gas ultrasonic flowmeter Part 2. Ultrasonic flowmeters for industrial measurement1 ScopeGB/T 34041 provisions of this part of the use of acoustic signals to measure the closed pipe gas flow gas ultrasonic flowmeter (referred to as. Flow meter) requirements and recommendations, but also provides gas ultrasonic flowmeter performance, calibration (if necessary), the output characteristics of the requirements and installation condition. This section is mainly applicable to industrial flow measurement time-of-flight gas ultrasonic flowmeter, including meter body with a flow meter and on-site safety Transducer installed flowmeter. This section there is no limit on the maximum or minimum size of the flowmeter. This section can be applied to the measurement of various gases, packages Including air, hydrocarbon gases and steam.2 Normative referencesThe following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document. ISO 4006 closed pipe fluid flow measurement terms and symbols (Measurementoffluidflowinclosedcon- duits-Vocabularyandsymbols) 3 Terms, definitions, symbols and abbreviations 3.1 Terms and definitions 3.1.1 General ISO 4006 defined and the following terms and definitions apply to this document. 3.1.2 amount 3.1.2.1 Volumeflow volumeflowrate qV qV = dV dt In the formula. V --- volume; t --- time. Rewriting ISO 80000-4.2006 [8] Definitions 4-30. 3.1.2.1.1 Actualflowrate Measurement of fluid volume per unit of time. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 34041.2-2017_English be delivered?Answer: Upon your order, we will start to translate GB/T 34041.2-2017_English as soon as possible, and keep you informed of the progress. The lead time is typically 4 ~ 6 working days. 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