NZS 5259:2015
Gas measurement
Provides performance criteria for all gas measurement systems offering a means of compliance under the Gas Act 1992. The standard sets out requirements for gas measurement that are useful, measurable, and repeatable as a minimum standard for the gas sector. It aims to improve the accuracy of gas measurement and to benefit both the gas sector and the consumer by providing a means of compliance for gas measurement to meet performance criteria.
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Contents
Referenced documents
Review of standards
Related documents
Foreword
Outcome statement
1 General
1.1 Scope
1.2 Application
1.3 Definitions
1.4 Abbreviations
1.5 Interpretation
1.6 Units of measurement of energy
2 Performance requirements
2.1 Purpose
2.2 General requirements of the gas measurement system
2.3 Specific suitability requirements
2.4 Metrological performance of gas measurement systems and components
2.5 Testing
2.6 GMS design, construction, and transportation
2.7 GMS operation and maintenance
2.8 Documentation
2.9 Competency
2.10 Auditing
2.11 Conversion of measured units to energy
2.12 Conversion of actual volume to standard volume
2.13 Conversion of standard volume to energy
2.14 Conversion of measured mass to standard volume
2.15 Conversion of measured mass directly to energy
3 A means of compliance
3.1 Purpose
3.2 General safety
3.3 GMS specification and design
3.4 Specific meter, conversion device, and regulator tests
3.5 GMS installation
3.6 GMS operation and maintenance
3.7 Documentation
3.8 Conversion factor value determination and application
Appendix
Appendix A - Commonly used conversion factors
Appendix B - Guidance on the accuracy requirements for the time parameter of time-stamped data
Appendix C - Compliance checklist
Appendix D - Installation tests for specific types of device
Appendix E - Test equipment and test area requirements for testing conversion devices
Appendix F - Specific requirements for the transfer prover and transfer prover test area
Appendix G - Specific requirements for bell provers and bell prover test areas
Appendix H - External leakage test
Appendix J - Accuracy testing of meters by transfer prover
Appendix K - Accuracy testing of gas meters by bell prover
Appendix L - Testing of conversion devices
Table
Table 1 - Transitional flow rate
Table 2 - Maximum permissible errors for meters (% of reading)
Table 3 - Maximum permissible errors for conversions (% of conversion)
Table 4 - Selection of equipment
Table 5 - Accuracy of registration test points
Table 6 - Accuracy of conversion test points
Table 7 - Acceptance testing intervals
Table 8 - Acceptable quality levels
Figure
Figure 1 - Conversion of actual volume into energy
Figure F1 - Schematic representation of a low pressure transfer prover
Figure F2 - Control chart (example only)
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References
Gas meters - In-service compliance testing
Measurement management systems - Requirements for measurement processes and measuring equipment (withdrawn in Australia)
Electricity and gas industries – Safety management systems for public safety
Related Information
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Contents
Referenced documents
Review of standards
Related documents
Foreword
Outcome statement
1 General
1.1 Scope
1.2 Application
1.3 Definitions
1.4 Abbreviations
1.5 Interpretation
1.6 Units of measurement of energy
2 Performance requirements
2.1 Purpose
2.2 General requirements of the gas measurement system
2.3 Specific suitability requirements
2.4 Metrological performance of gas measurement systems and components
2.5 Testing
2.6 GMS design, construction, and transportation
2.7 GMS operation and maintenance
2.8 Documentation
2.9 Competency
2.10 Auditing
2.11 Conversion of measured units to energy
2.12 Conversion of actual volume to standard volume
2.13 Conversion of standard volume to energy
2.14 Conversion of measured mass to standard volume
2.15 Conversion of measured mass directly to energy
3 A means of compliance
3.1 Purpose
3.2 General safety
3.3 GMS specification and design
3.4 Specific meter, conversion device, and regulator tests
3.5 GMS installation
3.6 GMS operation and maintenance
3.7 Documentation
3.8 Conversion factor value determination and application
Appendix
Appendix A - Commonly used conversion factors
Appendix B - Guidance on the accuracy requirements for the time parameter of time-stamped data
Appendix C - Compliance checklist
Appendix D - Installation tests for specific types of device
Appendix E - Test equipment and test area requirements for testing conversion devices
Appendix F - Specific requirements for the transfer prover and transfer prover test area
Appendix G - Specific requirements for bell provers and bell prover test areas
Appendix H - External leakage test
Appendix J - Accuracy testing of meters by transfer prover
Appendix K - Accuracy testing of gas meters by bell prover
Appendix L - Testing of conversion devices
Table
Table 1 - Transitional flow rate
Table 2 - Maximum permissible errors for meters (% of reading)
Table 3 - Maximum permissible errors for conversions (% of conversion)
Table 4 - Selection of equipment
Table 5 - Accuracy of registration test points
Table 6 - Accuracy of conversion test points
Table 7 - Acceptance testing intervals
Table 8 - Acceptable quality levels
Figure
Figure 1 - Conversion of actual volume into energy
Figure F1 - Schematic representation of a low pressure transfer prover
Figure F2 - Control chart (example only)
Previous versions
NZS 5259:2015
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.