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GB/T 18603-2023: Technical requirements of measuring systems for natural gas
Status: Valid GB/T 18603: Evolution and historical versions
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Technical requirements of measuring systems for natural gas
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Basic data | Standard ID | GB/T 18603-2023 (GB/T18603-2023) | | Description (Translated English) | Technical requirements of measuring systems for natural gas | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | E98 | | Classification of International Standard | 75.180.30 | | Word Count Estimation | 36,367 | | Date of Issue | 2023-11-27 | | Date of Implementation | 2024-03-01 | | Older Standard (superseded by this standard) | GB/T 18603-2014 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 18603-2023: Technical requirements of measuring systems for natural gas---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.
ICS 75:180:30
CCSE98
National Standards of People's Republic of China
Replace GB/T 18603-2014
Technical requirements for natural gas metering systems
Published on 2023-11-27
2024-03-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration Committee
Table of contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 2
4 General requirements 3
4:1 Standard reference conditions 3
4:2 Gas quality 3
4:3 Flow measurement 3
4:4 Calorific value measurement 3
4:5 Energy determination 3
4:6 Environmental conditions 4
4:7 Short 4
4:8 Security 4
4:9 Out of service 4
5 Design and Construction 5
5:1 Design 5
5:2 Construction 7
6 Calorie Calorie Measurement 9
6:1 General requirements 9
6:2 Analysis system 9
6:3 Performance requirements 10
6:4 Operation and maintenance 11
6:5 Assignment 12
7 Reliability and Calibration of Natural Gas Metering Systems12
7:1 Accuracy requirements12
7:2 Installation requirements 14
8 Put into production and trial operation 16
8:1 General requirements 16
8:2 Test equipment16
8:3 Trial run 17
8:4 Testing and calibration procedures17
9 Acceptance 20
9:1 General requirements 20
9:2 Inspection after commissioning 20
9:3 Metering system performance evaluation 20
10 Operation and Maintenance 20
10:1 General 20
10:2 Flowmeter 21
10:3 Data collection and processing device 22
10:4 Inspection after maintenance 22
10:5 Consistency 23
10:6 Data files 23
Appendix A (Normative) Instrumentation Requirements 24
A:1 Metering system 24
A:2 Supporting instruments 24
Appendix B (informative) Flowmeter Selection Guide 26
Appendix C (informative) Supporting instrument test procedures 28
C:1 Differential pressure sensor 28
C:2 Pressure sensor 28
C:3 Temperature sensor 29
Appendix D (Informative) Files and Records 30
D:1 File 30
D:2 Record 30
D:3 File Confirmation 30
Reference 31
Foreword
This document complies with the provisions of GB/T 1:1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents"
Drafting:
This document replaces GB/T 18603-2014 "Technical Requirements for Natural Gas Metering Systems": Compared with GB/T 18603-2014, except for the structure
In addition to adjustments and editorial changes, the main technical changes are as follows:
a) Changed the definitions of metering stations, metering systems, fixed assignments, and variable assignments (see 3:3, 3:2, 3:10:1, 3:10:2,:2014 edition
3:1, 3:3, 3:13:1, 3:13:2); added terms and definitions for metering circuits, data acquisition and processing devices, and natural gas real flow calibration
(See 3:1, 3:4, 3:9); deleted terms and definitions of flow computer, conversion device, pressure, temperature, dry basis (see:2014 edition
3:6, 3:7, 3:10, 3:11, 3:14):
b) Added gas quality requirements (see 4:2); changed equipment selection requirements in extreme environments (see 4:6:4,:2014 version
4:6:4); deleted the requirements for quality management system (see 4:8 of the:2014 edition); changed the requirements for vent design (see 4:7,:2014 edition
4:6:6); Added outage requirements (see 4:9):
c) The requirements for other devices supporting the metering system have been changed (see 5:1:1:3, 5:1:1:3 of the:2014 edition); the metering pipeline has been changed
Requirements for installing small-diameter bypass pipes and valves on one side of the upstream stop valve (see 5:1:2:6, 5:1:2:6 of the:2014 edition); added
Relevant requirements for standard nozzle flow meters and channel flow meters (see 5:1:5:2, 7:2:9, 7:2:10, 8:4:3:7, 8:4:3:8, 10:2:8,
10:2:9); Change the orifice flowmeter to a standard orifice flowmeter (see 5:1:2:2, 7:2:3, 8:4:3:1,:2014 version of 5:1:2:2,
7:2:7, 8:4:3:6); deleted the requirement for conversion device (see 5:1:5:3, 10:3 of the:2014 edition); added data acquisition and processing device
requirements for placement (see 5:1:5:3, 10:3); changed the requirements for the depth of thermometer sleeve insertion into the pipeline (see 5:2:4:4,:2014 edition
5:2:4:4):
d) Added the overall requirements for using offline or assignment methods to measure calorific value (see 6:1); changed the requirements for installing processing equipment
(See 6:2:2, 6:2:2 of the:2014 edition); Added requirements for the cumulative sampling system (see 6:2:2); Changes to the gas chromatograph or the
Requirements for calorimeter performance evaluation (see 6:3:1:2, 6:3:1 of the:2014 edition); added the selected assignment method when using
Evaluation criteria before or when the assignment source changes [see 6:5:3a)]; Added the assignment method available for Class A metering systems to obtain heat
Relevant requirements for quantity or composition data [see 6:5:3d), Chapter 6 of the:2014 edition]:
e) The installation requirements for vortex flowmeters are deleted (see 7:2:5 of the:2014 edition):
f) Delete the relevant requirements for vortex flowmeters in the test and calibration procedures (see 8:4:3:3 of the:2014 edition); delete the
The uncertainty caused by differences in installation conditions should not exceed the requirement of 0:3% (see 8:4:4 of the:2014 edition); changed the gas chromatograph
Instrument performance related requirements (see 8:4:6:5,:2014 version of 8:4:6:5):
g) Added measurement system performance evaluation requirements (see 9:3):
Please note that some content in this document may be subject to patents: The publisher of this document assumes no responsibility for identifying patents:
This document is proposed and coordinated by the National Petroleum and Natural Gas Standardization Technical Committee (SAC/TC355):
This document was drafted by: China Petroleum Engineering Construction Co:, Ltd: Southwest Branch, China National Petroleum Corporation Southwest Oil and Gas
Tian Branch, National Petroleum and Natural Gas Pipeline Network Group Co:, Ltd: West-East Gas Pipeline Company, National Petroleum and Natural Gas Pipeline Network Group Co:, Ltd:,
National Oil and Gas Pipeline Network Group Co:, Ltd: Western Pipeline Company, Emerson Process Control Co:, Ltd:, and Tianxin Instrument Group Co:, Ltd:
The main drafters of this document: Huang He, Chen Yu, Duan Jiqin, Ren Jia, Xu Gang, Wu Yan, He Min, Luo Qin, Song Chaofan, Cai Haohui, Zhou Yang, Xu Ming,
Jia Xiaolin, Huang Yangting, Qiu Hui, Huang Yixiang, Chen Yubo, Zhou Yu, Tao Chaojian, Wang Hailan:
This document was first published in:2001, revised for the first time in:2014, and this is the second revision:
Technical requirements for natural gas metering systems
1 Scope
This document specifies the general requirements, design and construction, calorific value measurement, and
Technical requirements for reliability and calibration, commissioning and trial operation, acceptance, operation and maintenance:
This document applies to designs with a throughput capacity of not less than 100m3/h (under standard reference conditions) and a working pressure of not less than 0:1MPa (gauge pressure):
Natural gas metering station trade metering system:
2 Normative reference documents
The contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, the dated quotations
For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to
this document:
GB/T 3836:1 Explosive atmosphere Part 1: General requirements for equipment
GB/T 3836:2 Explosive atmospheres Part 2: Equipment protected by flameproof enclosure "d"
GB/T 3836:3 Explosive atmospheres Part 3: Equipment protected by increased safety type "e"
GB/T 3836:4 Explosive atmospheres Part 4: Equipment protected by intrinsically safe type "i"
GB/T 5274:1 Preparation of mixed gases for gas analysis calibration Part 1: Preparation of first-level mixed gases by weighing method
GB/T 10248 Static volume method for preparation of mixed gases for gas analysis calibration
GB/T 11062 Calculation method for calorific value, density, relative density and Wobbe index of natural gas
GB/T 13610 Gas chromatography method for composition analysis of natural gas
GB/T 17626:1-2006 General introduction to electromagnetic compatibility testing and measurement technology immunity testing
GB/T 17626:3 Electromagnetic compatibility testing and measurement technology Radio frequency electromagnetic field radiation immunity test
GB/T 17626:6 Electromagnetic compatibility test and measurement technology Conducted disturbance immunity induced by radio frequency fields
GB/T 17626:9 Electromagnetic compatibility test and measurement technology pulse magnetic field immunity test
GB/T 17747 (all parts) Calculation of natural gas compression factor
GB 17820 Natural gas
GB/T 18604 Measuring natural gas flow with gas ultrasonic flow meter
GB/T 21391 Gas turbine flowmeter for measuring natural gas flow
GB/T 21446 Measuring natural gas flow using standard orifice flowmeter
GB/T 22723 Determination of natural gas energy
GB/T 27894 (all parts) Determination of composition of natural gas by gas chromatography and calculation of related uncertainties
GB/T 30490 Natural gas automatic sampling method
GB/T 30491:1 Calculation of thermodynamic properties of natural gas Part 1: Gas phase properties in gas transmission and distribution
GB/T 34166 Use standard nozzle flow meter to measure natural gas flow
GB/T 35186 Natural gas metering system performance evaluation
GB/T 37124 Gas quality requirements entering long-distance natural gas pipelines
GB 50251-2015 Gas pipeline engineering design specifications
GB 50540-2009 Construction specifications for process pipeline engineering in oil and gas stations
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