GB/T 6968-2019 English PDFUS$1159.00 ยท In stock
Delivery: <= 7 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 6968-2019: Diaphragm gas meters Status: Valid GB/T 6968: Historical versions
Basic dataStandard ID: GB/T 6968-2019 (GB/T6968-2019)Description (Translated English): Diaphragm gas meters Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: N12 Classification of International Standard: 75.180.30; 91.140.40 Word Count Estimation: 58,546 Date of Issue: 2019-05-10 Date of Implementation: 2019-12-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 6968-2019: Diaphragm gas meters---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.Diaphragm gas meters ICS 75.180.30; 91.140.40 N12 National Standards of People's Republic of China Replace GB/T 6968-2011 Membrane gas meter Published on.2019-05-10 2019-12-01 implementation State market supervision and administration China National Standardization Administration issued ContentForeword III 1 Scope 1 2 Normative references 1 3 terms, definitions and symbols 2 3.1 Terms and Definitions 2 3.2 Symbol 4 4 working conditions 5 4.1 Flow Range 5 4.2 Maximum working pressure 6 4.3 Temperature range 6 4.4 Installation site 6 5 Technical requirements 6 5.1 Measurement characteristics 6 5.2 Structure and materials 8 5.3 Environmental temperature resistance 10 5.4 Mechanical properties 10 5.5 Mechanical seal 11 5.6 Optional Features 11 5.7 Additional devices for gas meters 12 5.8 Gas meter with built-in gas volume conversion device 12 5.9 Appearance and logo 12 6 Test method 13 6.1 Measurement characteristics 13 6.2 Structure and materials 15 6.3 Environmental temperature resistance 20 6.4 Mechanical properties 21 6.5 Mechanical seal 25 6.6 Optional Features 26 6.7 Gas meter attachments 29 6.8 Gas meter with built-in gas volume conversion device 29 6.9 Appearance and logo 29 7 Inspection rules 30 7.1 Type Inspection 30 7.2 Factory inspection 30 8 Packaging, transport and storage 32 8.1 Packing 32 8.2 Transportation and storage 32 Appendix A (Normative Appendix) Gas meter with built-in gas volume conversion device 33 Appendix B (Normative) Additional requirements and tests for outdoor installed gas meters without any protective measures 37 Appendix C (Normative Appendix) Additional Devices for Gas Meters 38 Appendix D (informative) Durability 53 Reference 54ForewordThis standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 6968-2011 "membrane gas meter". Compared with GB/T 6968-2011, the main technical changes are as follows. --- Revised the scope of application of the standard (see Chapter 1); --- Modify, add and delete some terms and definitions (see Chapter 3, Chapter 3 of the.2011 edition); --- Increased the requirements for the thread size of the pipe joint, and removed the contents of the single pipe joint (see 5.2.7, 6.2.6 of the.2011 edition); --- Revised the corrosion resistance requirements of gas meters and simplified the requirements for salt spray resistance (see 5.2.8, 6.3 of.2011 edition); --- Increased the temperature adaptability requirements of gas meters (see 5.3.2); --- Modified the gas meter to record the reverse cumulative flow requirements (see 5.4.3,.2011 version 6.5.4.1.1); --- Removed the relevant requirements for insulated feet and counter magnetic actuators in optional features (see 6.5.2, 6.5.3 in.2011); --- Increased resistance to toluene/isooctane, water vapor resistance (see 5.6.4, 5.6.5); --- Revised the test pressure requirements for sealing and compressive strength (see 6.2.1, 6.2.2,.2011. 6.2.3, 6.2.4); --- Revised the durability test method (see 6.4.1,.2011 version 7.1); --- Increased the adhesion test of the mark (see 6.9.2.2.3); --- Change the "accessory device for gas meter" to "additional device for gas meter" (see Appendix C); ---Modified the operating voltage and current of the additional device (see C.2.2.1.1,.2011 edition of C.1, C.3.1.1); --- Increased battery related requirements (see C.2.1); --- Increased the requirements for electronic seals (see C.2.2.1.3.1); --- Increased data storage requirements (see C.2.2.1.5); --- Revised the relevant requirements for prepaid control devices (see C.2.2.3,.2011 edition of C.3.3); --- Added the relevant requirements for the ladder charging control device (see C.2.2.4); --- Revised the durability requirements of the control valve and increased the corrosion resistance requirements (see C.2.2.5.2, C.2.2.5.3,.2011 edition of C.3.4.2); --- Increased the relevant requirements for the cut-off type (abnormal valve closing) function device (see C.2.2.6); --- Increased requirements for energy metering converters (see C.2.2.7); --- Added firmware requirements (see C.2.4); --- Change the original "built-in mechanical gas temperature conversion device" to "built-in gas temperature conversion device" and increase the built-in gas temperature Requirements for pressure conversion devices (see Appendix A); --- Removed the.2011 edition of the informative Appendix A and Appendix B. This standard was proposed by the China Machinery Industry Federation. This standard is under the jurisdiction of the National Industrial Process Measurement Control and Automation Standardization Technical Committee (SAC/TC124). This standard was drafted. Chongqing Qianwei Kromm Industry Co., Ltd., Chengdu Qinchuan Internet of Things Technology Co., Ltd., Shanghai Industrial Industry Automation Instrumentation Research Institute Co., Ltd., Beijing Institute of Metrology and Measurement Science, Chongqing Institute of Metrology and Quality Inspection, Zhejiang Province Institute of Science, Liaoning Institute of Metrology, Chongqing Qianwei Technology Group Co., Ltd., Jinka Intelligent Group Co., Ltd., Dandong Heat Instrument Co., Ltd., Chongqing Shancheng Gas Equipment Co., Ltd., Shanghai Zhenlan Instrument Technology Co., Ltd., Rongcheng Yuxiang Industrial Co., Ltd. Company, Liaoning Sikai Technology Co., Ltd., Liaoning Hangyu Star IOT Instrument Technology Co., Ltd., Langfang Xinao Gas Equipment Co., Ltd. Zhejiang Zhengtai Instrument & Meter Co., Ltd., Zhejiang Rongxin Intelligent Instrument Co., Ltd., Zhejiang Weixing Intelligent Instrument Co., Ltd. Chengdu Qianjia Technology Co., Ltd., Anhui Hongling Electromechanical Instrument (Group) Co., Ltd., Ningbo Donghai Gas Metering Technology Co., Ltd., Zhejiang Songchuan Instrument Technology Co., Ltd., Zhengzhou China Resources Gas Co., Ltd., Beijing Gas Group Co., Ltd. The main drafters of this standard. Yin Daiqiang, Chen Hailin, Li Yuan, Wang Wenli, Quan Yaqiang, Guo Aihua, Wang Jianing, Yang Youtao, Liao Xin, Jin Wei, Lu Ke, Guo Gang, Sun Xiaodong, Xu Yizhou, Ren Haijun, Zou Ziming, Shi Jianjun, Cheng Bo, Yang Wenfeng, Chen Zhou, Huang Baotuan, Zhao Yanhua, Luo Chengbin, Lin Lusheng, Liu Zhaodong, Li Fuzeng, Deng Lisan, Huang Donghong, Wang Guohui. The previous versions of the standards replaced by this standard are. ---GB 6968-1986, GB/T 6968-1997, GB/T 6968-2011. Membrane gas meter1 ScopeThis standard specifies the terms, definitions, symbols, working conditions, technical requirements, test methods, and inspections of membrane gas meters (hereinafter referred to as gas meters). Inspection rules, packaging, transportation and storage. This standard is applicable to the maximum working pressure not exceeding 50 kPa, the maximum flow rate not exceeding 160 m3/h, and the accuracy level being 1.5. Gas meter. Note. Unless otherwise stated, the pressures referred to in this standard refer to relative atmospheric pressure (gauge pressure).2 Normative referencesThe following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 191 packaging storage and transportation icon GB/T 2410-2008 Determination of transmittance and haze of transparent plastics GB/T 2423.3-2016 Environmental testing - Part 2. Test method test Cab. constant damp heat test GB/T 2423.17-2008 Environmental testing of electric and electronic products - Part 2. Test method test Ka. salt spray GB 3836.1 Explosive atmosphere - Part 1. General requirements for equipment Explosive atmospheres - Part 2. Equipment protected by flameproof enclosure "d" Explosive atmospheres - Part 4. Equipment protected by intrinsically safe "i" GB/T 4208-2017 enclosure protection grade (IP code) GB/T 5080.7-1986 Equipment reliability test Verification test for failure rate and mean time between failures under the assumption of constant failure rate Inspection plan GB/T 8897.1 Primary batteries Part 1. General GB 8897.4 Primary batteries - Part 4. Safety requirements for lithium batteries GB/T 9113-2010 integral steel pipe flange GB/T 9978.1 Fire resistance test methods for building components - Part 1. General requirements GB/T 10125-2012 Artificial atmosphere corrosion test salt spray test GB/T 11186.3-1989 Methods of measurement of colour of coatings - Part 3 GB/T 13893-2008 Determination of moisture resistance of paints and varnishes - Continuous condensing method GB/T 14536.1-2008 Automatic controls for household and similar use - Part 1. General requirements GB/T 16422.3-2014 exposure test methods for light source of plastics - Part 3. Fluorescent UV lamps GB/T 17626.2-2006 Electromagnetic compatibility test and measurement technology Electrostatic discharge immunity test GB/T 17626.3-2016 Electromagnetic compatibility test and measurement technology RF electromagnetic field radiation immunity test GB/T 17626.4-2008 Electromagnetic compatibility test and measurement technology Electrical fast transient burst immunity test GB/T 17626.5-2008 Electromagnetic compatibility test and measurement technology Surge (impact) immunity test GB/T 30789.3-2014 Paint and varnish coating aging evaluation of the number and size of defects and the appearance of uniform changes Identification of degrees - Part 3. Assessment of rust grade ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 6968-2019_English be delivered?Answer: Upon your order, we will start to translate GB/T 6968-2019_English as soon as possible, and keep you informed of the progress. The lead time is typically 4 ~ 7 working days. 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Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 6968-2019?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 6968-2019 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
