GB/T 34166-2017Measumement of natural gas flow by means of standard nozzle meters (English PDF)
用标准喷嘴流量计测量天然气流量
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
September 7, 2017
Implementation date
April 1, 2018
Scope
GB/T 34166-2017 is the English-translated version of 用标准喷嘴流量计测量天然气流量.
GB/T 34166-2017 is the Chinese standard "Measumement of natural gas flow by means of standard nozzle meters".
Its scope clause reads: 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. Its clauses include terms, definitions and symbols.
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Document preview — GB/T 34166-2017
National Standard of the People's Republic of China
- ICS
- 75.180.30
- Classification
- E 98
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms, definitions and symbols
- 3.1 Terms and definitions
- 3.2 Symbol
- 4 measuring principle and general requirements
- 4.1 Measurement principle
- 4.2 throttling device
- 4.3 requirements of the state of flow
- 4.4 reference conditions
- 5 standard nozzle flowmeter
- 5.1 standard nozzle
- 5.2 pressure device
- 5.3 standard nozzle coefficient
- 5.4 Pressure loss
- 5.5 Setting nozzle
- 5.6 secondary instrument
- 6 Installation Requirements
- 6.1 General
- 6.2 installed in a variety of pipe fittings and standard nozzles upstream and downstream straight pipe
- 6.3 Flow Regulator
- 6.4 Pipeline circularity and cylindricity
- 6.5 Standard nozzle and clamping ring position
- 6.6 Fastening methods and washers
- 7 Verification and Calibration Requirements
- 7.1 Geometric verification
- 7.2 Online Calibration
- 8 traffic calculation
- 8.1 Mass Flow Calculation
- 8.2 standard reference conditions of the volume flow calculation
- 8.3 Calculation of energy flow under standard reference conditions
- 8.4 Parameter Calculation
- 8.5 Flow Calculation Program
- 8.6 Value
- 8.7 value repair about
- 9 Flow Measurement Uncertainty Calculation
- 9.1 General
- 9.2 Mass Flow Measurement Uncertainty Calculation
- 9.3 Differential Pressure Measurement Uncertainty Calculation
- 9.4 Operating conditions, the uncertainty of density measurement calculation
- 9.5 Temperature Measurement Uncertainty Calculation
- 9.6 Pressure Measurement Uncertainty Calculation
- 9.7 Calculation of Measurement Uncertainty of Volume Flow under Standard Reference Conditions
- 9.8 Energy Measurement Uncertainty Under Standard Reference Conditions
- Appendix A (Informative) Outflow coefficient and coefficient of expansion Table
- Appendix B (Informative) Iterative Calculation
- Appendix C (Normative) Pipe Equivalent Uniform roughness k value Table
- Appendix D (Informative) Setting nozzle
- Appendix E (informative) flow computer basic requirements
- Appendix F (informative) Standard nozzle calculation example
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
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.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 38 pages — is available in the English PDF.
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