AGA XQ9801 : 2000
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
MEASUREMENT OF GAS BY MULTIPATH ULTRASONIC METERS
Hardcopy , PDF
01-04-2007
English
12-01-2013
1 Introduction
1.1 Scope
1.2 Principle of Measurement
2 Terminology
3 Operating Conditions
3.1 Gas Quality
3.2 Pressures
3.3 Temperatures, Gas and Ambient
3.4 Gas Flow Considerations
3.5 Upstream Piping and Flow Profiles
4 Meter Requirements
4.1 Codes and Regulations
4.2 Meter Body
4.2.1 Maximum Operating Pressure
4.2.2 Corrosion Resistance
4.2.3 Meter Body Lengths and Bores
4.2.4 Ultrasonic Transducer Ports
4.2.5 Pressure Tap
4.2.6 Miscellaneous
4.2.7 Meter Body Markings
4.3 Ultrasonic Transducers
4.3.1 Specifications
4.3.2 Rate of Pressure Change
4.3.3 Exchange
4.3.4 Transducer Tests
4.4 Electronics
4.4.1 General Requirements
4.4.2 Output Signal Specifications
4.4.3 Electrical Safety Design Requirements
4.5 Computer Programs
4.5.1 Firmware
4.5.2 Configuration and Maintenance Software
4.5.3 Inspection and Auditing Functions
4.5.4 Alarms
4.5.5 Diagnostic Measurements
4.5.6 Engineering Units
4.6 Documentation
4.6.1 After Receipt of Order
4.6.2 Before Shipment
5 Performance Requirements
5.1 Definitions
5.2 General
5.2.1 Large Meter Accuracy
5.2.2 Small Meter Accuracy
5.3 Pressure, Temperature and Gas Composition
Influence
6 Individual Meter Testing Requirements
6.1 Leakage Tests
6.2 Dimensional Measurements
6.3 Zero-Flow Verification Test (Zero Test)
6.4 Flow-Calibration Test
6.4.1 Calibration Factors Adjustment
6.4.2 Test Reports
6.5 Quality Assurance
7 Installation Requirements
7.1 Environmental Consideration
7.1.1 Temperature
7.1.2 Vibration
7.1.3 Electrical Noise
7.2 Piping Configuration
7.2.1 Flow Direction
7.2.2 Piping Installation
7.2.3 Protrusions
7.2.4 Internal Surface
7.2.5 Thermowells
7.2.6 Acoustic Noise Interference
7.2.7 Flow Conditioners
7.2.8 Orientation of Meter
7.2.9 Filtration
7.3 Associated Flow Computer
7.3.1 Flow-Computer Calculations
7.4 Maintenance
8 Field Verification Tests
9 Reference List
Appendix A: Multipath Ultrasonic Meter Flow-Calibration
Issues
Appendix B: Electronic Design Testing - a standardized
set of international testing specifications
applicable to electronic gas meters
Appendix C: A.G.A Engineering Technical Note M-96-2-3,
Ultrasonic Flow Measurement for Natural Gas
Applications, March 1996
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