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GB/T 34166-2017: Measurement of natural gas flow by means of standard nozzle meters
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GB/T 34166-2017: Measurement of natural gas flow by means of standard nozzle meters

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Measumement of natural gas flow by means of standard nozzle meters ICS 75.180.30 E98 National Standards of People's Republic of China Measure the flow of natural gas with a standard nozzle flow meter 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 1 Scope 1 2 Normative references 1 3 Terms, definitions and symbols 1 3.1 Terms and definitions 1 3.2 Symbol 2 4 measuring principle and general requirements 3 4.1 Measurement principle 3 4.2 throttling device 3 4.3 requirements of the state of flow 3 4.4 reference conditions 3 5 standard nozzle flowmeter 3 5.1 standard nozzle 3 5.2 pressure device 5 5.3 standard nozzle coefficient 6 5.4 Pressure loss 9 5.5 Setting nozzle 9 5.6 secondary instrument 9 6 Installation Requirements 9 6.1 General 9 6.2 installed in a variety of pipe fittings and standard nozzles upstream and downstream straight pipe 10 6.3 Flow Regulator 14 6.4 Pipeline circularity and cylindricity 14 6.5 Standard nozzle and clamping ring position 15 6.6 Fastening methods and washers 15 7 Verification and Calibration Requirements 15 7.1 Geometric verification 15 7.2 Online Calibration 16 8 traffic calculation 16 8.1 Mass Flow Calculation 16 8.2 standard reference conditions of the volume flow calculation 16 8.3 Calculation of energy flow under standard reference conditions 16 8.4 Parameter Calculation 16 8.5 Flow Calculation Program 17 8.6 Value 18 8.7 value repair about 19 9 Flow Measurement Uncertainty Calculation 19 9.1 General 19 9.2 Mass Flow Measurement Uncertainty Calculation 19 9.3 Differential Pressure Measurement Uncertainty Calculation 20 9.4 Operating conditions, the uncertainty of density measurement calculation 20 9.5 Temperature Measurement Uncertainty Calculation 20 9.6 Pressure Measurement Uncertainty Calculation 21 9.7 Calculation of Measurement Uncertainty of Volume Flow under Standard Reference Conditions 21 9.8 Energy Measurement Uncertainty Under Standard Reference Conditions 21 Appendix A (Informative) Outflow coefficient and coefficient of expansion Table 23 Appendix B (Informative) Iterative Calculation 25 Appendix C (Normative) Pipe Equivalent Uniform roughness k value Table 27 Appendix D (Informative) Setting nozzle 28 Appendix E (informative) flow computer basic requirements 29 Appendix F (informative) Standard nozzle calculation example 32

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. Please note that some of this document may be patentable. The issuing agencies of this document do not bear the responsibility of identifying these patents. This standard by the National Standardization Technical Committee of Oil and Gas (SAC/TC355) and focal point. This standard was drafted by. Beijing Bosi Da New Century Measurement and Control Technology Co., Ltd., China Petroleum West-East Pipeline Company Nanjing measurement test Center, China Institute of Metrology, Southwest Branch of China Petroleum Engineering Design Co., Ltd., Anhui Institute of Metrology, National Oil and Gas Large Flow Metering Station, National Oil and Gas Large Flow Metering Station Chengdu Substation. The main drafters of this standard. Zhou Guoxiang, Zhang Fuyuan, Wang Jingan, Li Chunhui, Huang and Sun Xiuliang, Gao Jun, Duan Jiqin, Chen Lei, Xie Yu, Xiao Hui, Li Jia, Chen Xingchuan, Deng Liang, Hu Zhipeng. Measure the flow of natural gas with a standard nozzle flow meter Important Note This standard does not cover all the safety issues related to its application, the use of this standard, the user has the responsibility to develop corresponding Safety and protection measures, and define the scope of its application.

1 Scope

This standard specifies the standard nozzle structure, technical requirements, methods of use, installation and operating conditions, test requirements; given the natural Volume flow and energy flow, mass flow, and calculation of their measurement uncertainty under gas standard reference conditions. This standard applies to the use of standard nozzles on methane as the main component of the single-phase mixed gas throughout the measurement section to maintain sub-subsonic fluid Fast flow measurement. This standard does not apply to the measurement of pulsatile flow, nor is it suitable for use in pipe diameters less than 50mm or greater than 500mm.

2 Normative references

The 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. GB/T 2624.1-2006 Measurement of full pipe fluid flow using differential pressure devices installed in circular sectioned pipes - Part 1. General Principles and requirements (ISO 5167-1.2003, IDT) GB/T 2624.3-2006 Manifold fluid flow measurement using a differential pressure device mounted in a circular sectioned pipe - Part 3. Nozzle And Venturi nozzle (ISO 5167-3.2003, IDT) GB 3836.1 Explosive atmospheres - Part 1. General requirements for equipment (GB 3836.1-2010, IEC 60079-0.2007, MOD) GB/T 8170 rounded repair rules and limit values of the representation and judgment GB/T 11062 natural gas calorific value, density, relative density and Wobbe index calculation method (GB/T 11062-2014, ISO 6976.1995, MOD) GB/T 17747 (all parts) Calculation of natural gas compression factor [GB/T 17747 (all parts) -2011, ISO 12213 Some) .2006, MOD] GB/T 18603 gas measurement system technical requirements Natural gas flow measurement with a standard orifice flowmeter JJG640 differential pressure flow meter JJF1059.1 Evaluation and Expression of Measurement Uncertainty 3 Terms, definitions and symbols 3.1 Terms and definitions GB/T 2624-2006/ISO 5167.2003 Part 1, Part 3 and GB/T 21446-2008 defined, as well as the following The terms and definitions apply to this document. 3.1.1 Standard nozzle standardnozzle A device consisting of a cylindrical part, usually called the "throat", joined by a constriction inlet, ie GB/T 2624.1-2006/ISO 5167-1. 2003 and ISA1932 nozzles in GB/T 2624.3-2006/ISO 5167-3.2003. ...