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GB/T 41248-2022Measuring systems for gaseous fuel (English PDF)

燃气计量系统

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

March 9, 2022

Implementation date

October 1, 2022

Scope

GB/T 41248-2022 is the English-translated version of 燃气计量系统.

GB/T 41248-2022 is the Chinese standard "Measuring systems for gaseous fuel".

Its scope clause reads: This document specifies the terms and definitions of gas metering systems, measurement units and abbreviations, measurement requirements, measurement system technical requirements, flow rate Technical requirements for meters, measurement modules and auxiliary equipment, technical requirements for electronic equipment and measurement management requirements.

This document is applicable to the design under standard conditions, the maximum flow rate is greater than or equal to 100m3/h, and the absolute working pressure is greater than or equal to 200kPa gas metering system.

This document does not apply to compressed natural gas (CNG) metering systems for vehicles. This document does not provide any requirements applicable to flow meters. This document does not apply to membrane gas meters.

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Document preview — GB/T 41248-2022

National Standard of the People's Republic of China

Classification: N 12

Issued by: State Administration for Market Regulation, China National Standardization Administration

Foreword
1 Scope
2 Normative references
3 Terms and Definitions
3.1 Metering system and components
3.2 Metrology characteristics
3.3 Tests and test conditions
3.4 Related Electronic Devices
4 Units of measurement and abbreviations
4.1 Units of measurement
4.2 Symbols and Abbreviations
5 Metering system
5.1 Overview
5.2 Composition of the metering system
5.3 Flow measurement
6 Metrology Requirements
6.1 Accuracy classes of metering systems
6.2 Maximum allowable error of the metering system
6.3 Maximum permissible error of the measuring module
6.4 Other metrological properties of calorific value measuring devices
6.5 Maximum allowable error of totalizer
6.6 Measuring Module Repeatability
6.7 Durability of measurement modules
6.8 Maximum allowable error for subsequent verification and inspection in use
7 Technical requirements of metering system
7.1 General
7.2 Measurement module
7.3 Conversion to volume or mass at standard conditions
7.4 Energy Measurement
7.5 Marking
7.6 Seal
8 Technical requirements for flow meters, measurement modules and auxiliary equipment
8.1 Flow meters and measurement modules
8.2 Indicating devices
8.3 Printing equipment
8.4 Memory
8.5 Matching measuring instruments
8.6 Volume conversion device
8.7 Totalizer
8.8 Calorific value measuring device
8.9 Energy conversion device
9 Technical requirements for electronic equipment
9.1 General requirements
9.2 Power Supply
9.3 Checker
10 Metrology Management
10.1 General
10.2 Type approval
10.3 The first check
10.4 Subsequent checks
10.5 System Documentation, Quality Management System and Routine Inspection
Appendix A (Informative) This document and OIMLR140.2007 chapter numbering list
Appendix B (informative) General rules for gas metering systems
Appendix C (normative) Modular approach and error calculation method
Appendix D (normative) Influencing factor test for type evaluation of measurement modules
Appendix E (normative) Performance Environmental Impact Test of Electronic Metering System or Equipment
Appendix F (normative) Calibration gases for calorific value measuring instruments
Appendix G (Informative) Conversion of Gas Mass to Volume at Standard Conditions
Appendix H (Informative) Examples of Minimum Test Quantities for Metrology Systems and Devices

1 Scope

This document specifies the terms and definitions of gas metering systems, measurement units and abbreviations, measurement requirements, measurement system technical requirements, flow rate

Technical requirements for meters, measurement modules and auxiliary equipment, technical requirements for electronic equipment and measurement management requirements.

This document is applicable to the design under standard conditions, the maximum flow rate is greater than or equal to 100m3/h, and the absolute working pressure is greater than or equal to

200kPa gas metering system.

This document does not apply to compressed natural gas (CNG) metering systems for vehicles.

This document does not provide any requirements applicable to flow meters.

This document does not apply to membrane gas meters.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document.

GB/T 2423.1 Environmental Testing of Electrical and Electronic Products Part 2.Test Methods Test A. Low Temperature (GB/T 2423.1-

2008, IEC 60068-2-1.2007, IDT)

GB/T 2423.2 Environmental Testing of Electrical and Electronic Products Part 2.Test Methods Test B. High Temperature (GB/T 2423.2-

2008, IEC 60068-2-2.2007, IDT)

GB/T 2423.3 Environmental Test Part 2.Test Method Test Cab. Constant Damp Heat Test (GB/T 2423.3-2016,

IEC 60068-2-78.2012, IDT)

GB/T 2423.4 Environmental testing of electrical and electronic products Part 2.Test method Test Db. Alternating damp heat (12h 12h cycle

Ring) (GB/T 2423.4-2008, IEC 60068-2-30.2005, IDT)

GB/T 2423.43 Environmental Testing of Electrical and Electronic Products Part 2.Test Methods Vibration, Shock and Similar Dynamic Test Specimens

Installation of products (GB/T 2423.43-2008, IEC 60068-2-47.2005, IDT)

GB/T 2423.56 Environmental Testing Part 2.Test Methods Test Fh. Broadband Random Vibration and Guidelines (GB/T 2423.56-

2018, IEC 60068-2-64.2008, IDT)

GB/T 2424.1 Environmental Testing Part 3.Supporting Documents and Guidelines Low Temperature and High Temperature Testing (GB/T 2424.1-2015,

IEC 60068-3-1.2011, IDT)

GB/T 2424.2 Electrical and Electronic Products Environmental Test Guide for Damp Heat Test (GB/T 2424.2-2005, IEC 60068-3-4.

2001, IDT)

GB/T 11062-2020 Calculation method of calorific value, density, relative density and Wobbe index of natural gas (ISO 6976.2016,

IDT)

GB/T 13609-2017 Guidelines for natural gas sampling (ISO 10715.1997, MOD)

GB/T 17214.2-2005 Working conditions of industrial process measurement and control devices - Part 2.Power (IEC 60654-2.

1979, IDT)

GB/T 17626.1 Electromagnetic Compatibility Test and Measurement Technology Immunity Test General (GB/T 17626.1-2006,

GB/T 778.1 | GB/T 778.4 | GB/T 21117 | GB/T 42567.5 | GB/T 28857 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 158 pages — is available in the English PDF.

Referenced standards

Normative references

IEC 60068 · ISO 6976.2016 · ISO 10715.1997 · IEC 60654

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