ISO 17089-1:2010
Measurement of fluid flow in closed conduits - Ultrasonic meters for gas — Part 1: Meters for custody transfer and allocation measurement
ISO 17089-1:2010 specifies requirements and recommendations for ultrasonic gas flowmeters (USMs), which utilize the transit time of acoustic signals to measure the flow of single phase homogenous gases in closed conduits.
ISO 17089-1:2010 applies to transit time ultrasonic gas flowmeters used for custody transfer and allocation metering, such as full-bore, reduced-area, high-pressure, and low-pressure meters or any combination of these. There are no limits on the minimum or maximum sizes of the meter. ISO 17089-1:2010 can be applied to the measurement of almost any type of gas, such as air, natural gas, and ethane.
Included are flow measurement performance requirements for meters of two accuracy classes suitable for applications such as custody transfer and allocation measurement.
ISO 17089-1:2010 specifies construction, performance, calibration, and output characteristics of ultrasonic meters for gas flow measurement and deals with installation conditions.
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Scope
Normative references
Terms, definitions, and symbols
Terms and definitions
General
Quantities
Meter design
Thermodynamic conditions
Statistics
Symbols and subscripts
Abbreviations
Principles of measurement
Basic formulae
Factors affecting performance
Description of generic types
General
Transducers
Meter body and acoustic path configurations
General
Basic acoustic paths types
Commonly used multi-path cross-sectional configurations
Meters with paths of equal radial displacement
Meters with paths at off-diameter positions
Contributions to the uncertainty in measurement
USM classification
Reynolds number
Temperature and pressure correction
Introduction
Correction for the temperature
Pressure correction
General
General simplified expression for any body type
Refinement in initial estimate to account for different mete
Refinement in initial estimate for effects of end loading an
Effects of transducer ports
Total metering error
Detailed calculation procedure
Meter characteristics
Operating conditions
Flow rates and gas velocities
Pressure
Temperature
Gas quality
Meter body, materials, and construction
Materials
Meter body
Connections
Dimensions
Ultrasonic transducer ports
Pressure tappings
Anti-roll provision
Flow conditioner
Markings
Corrosion protection
Transducers
Specification
Rate of pressure change
Transducer characterization
Path configuration
Marking
Cable
Electronics
General requirements
Power supply
Pulse detection method
Sampling or pulsating flow
Signal-to-noise ratio
Processing of data
Output
Cable jackets and insulation
Marking
Software
Firmware
Discontinuity
Marking and version management
Configuration and monitoring software
Inspection and verification functions
Diagnostic parameters
Exchange of components
Determination of density
General
Pressure measurement
Temperature measurement and density measurement
Performance requirements
Accuracy requirements for class 1 meters
Accuracy requirements for class 2 meters
Influence of pressure, temperature, and gas composition
Operation and installation requirements
General
Operational requirements
Sound, noise, and pressure-regulating valves
Contamination
Ambient temperature
Vibration
Electrical noise
Non-steady flow
Installation requirements and flow profile considerations
General
Distance to perturbations, upstream and downstream straight
Protrusions and diameter step
Thermowells and density cells
Flow conditioners
Internal surface and wall roughness
Bidirectional use
Orientation of meter
Manual handling and transportation
Test and calibration
Pressure testing and leakage testing
Individual testing — Static testing
General
Geometrical parameters
Timing and time delays
Zero flow verification test
Individual testing — Flow calibration
General
Laboratory flow calibration
General
Duration of the calibration
Uncertainty of the calibration facility
Flow conditions
Stratification at a calibration facility
Traceability of the calibration facility
Limited calibration range at initial calibration
Limited calibration range at recalibration
Bidirectional calibration
Report
General
Results
Meter identification and description of the facility
Conditions of the test
Judging the measurement quality of the meter
Calculation of flow-weighted mean error (FWME)
Adjustment factors
Type testing, ensuring measurement quality in the field
General
Type testing
Accuracy
Installation conditions
Path failure simulation and exchange of components
Electronics design testing
Audit trail and operational practice
General
Verification process
Into operation
Operational diagnostics
Speed of sound
Absolute speed of sound comparison
Relative speed of sound comparison; footprint
Velocity ratios
Profile factor number
Other parameters
Audit trail during operation; inter-comparison and inspectio
Inter-comparison checks of multiple meters in series
Inspections
General
Zero flow checks
Visual inspection
Recalibration
General
Recalibration interval
Field recalibration
As-found laboratory recalibration
Handling in the field
Handling in the laboratory
Consequences and aftercare
Total operational uncertainty
Valve characterization and noise in a metering and regulatin
Introduction
Calculation method
General
Generation of noise by the control valve
Propagation of noise from the valve to the USM using attenua
Signal strength of the USM, Ps
Signal-to-noise ratio at the USM
M&R station design
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Related Information
Similar Standards
-
BS 1042-2.2:1983
Measurement of fluid flow in closed conduits. Velocity area methods, Method of measurement of velocity at one point of a conduit of circular cross section
-
BS 5857-1.1:1980
Methods for measurement of fluid flow in closed conduits, using tracers. Measurement of water flow, General
-
BS 5857-1.2:1980
Methods for measurement of fluid flow in closed conduits, using tracers. Measurement of water flow, Constant rate injection method using non-radioactive tracers
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BS 5857-1.3:1980
Methods for measurement of fluid flow in closed conduits, using tracers. Measurement of water flow, Constant rate injection method using radioactive tracers
Scope
Normative references
Terms, definitions, and symbols
Terms and definitions
General
Quantities
Meter design
Thermodynamic conditions
Statistics
Symbols and subscripts
Abbreviations
Principles of measurement
Basic formulae
Factors affecting performance
Description of generic types
General
Transducers
Meter body and acoustic path configurations
General
Basic acoustic paths types
Commonly used multi-path cross-sectional configurations
Meters with paths of equal radial displacement
Meters with paths at off-diameter positions
Contributions to the uncertainty in measurement
USM classification
Reynolds number
Temperature and pressure correction
Introduction
Correction for the temperature
Pressure correction
General
General simplified expression for any body type
Refinement in initial estimate to account for different mete
Refinement in initial estimate for effects of end loading an
Effects of transducer ports
Total metering error
Detailed calculation procedure
Meter characteristics
Operating conditions
Flow rates and gas velocities
Pressure
Temperature
Gas quality
Meter body, materials, and construction
Materials
Meter body
Connections
Dimensions
Ultrasonic transducer ports
Pressure tappings
Anti-roll provision
Flow conditioner
Markings
Corrosion protection
Transducers
Specification
Rate of pressure change
Transducer characterization
Path configuration
Marking
Cable
Electronics
General requirements
Power supply
Pulse detection method
Sampling or pulsating flow
Signal-to-noise ratio
Processing of data
Output
Cable jackets and insulation
Marking
Software
Firmware
Discontinuity
Marking and version management
Configuration and monitoring software
Inspection and verification functions
Diagnostic parameters
Exchange of components
Determination of density
General
Pressure measurement
Temperature measurement and density measurement
Performance requirements
Accuracy requirements for class 1 meters
Accuracy requirements for class 2 meters
Influence of pressure, temperature, and gas composition
Operation and installation requirements
General
Operational requirements
Sound, noise, and pressure-regulating valves
Contamination
Ambient temperature
Vibration
Electrical noise
Non-steady flow
Installation requirements and flow profile considerations
General
Distance to perturbations, upstream and downstream straight
Protrusions and diameter step
Thermowells and density cells
Flow conditioners
Internal surface and wall roughness
Bidirectional use
Orientation of meter
Manual handling and transportation
Test and calibration
Pressure testing and leakage testing
Individual testing — Static testing
General
Geometrical parameters
Timing and time delays
Zero flow verification test
Individual testing — Flow calibration
General
Laboratory flow calibration
General
Duration of the calibration
Uncertainty of the calibration facility
Flow conditions
Stratification at a calibration facility
Traceability of the calibration facility
Limited calibration range at initial calibration
Limited calibration range at recalibration
Bidirectional calibration
Report
General
Results
Meter identification and description of the facility
Conditions of the test
Judging the measurement quality of the meter
Calculation of flow-weighted mean error (FWME)
Adjustment factors
Type testing, ensuring measurement quality in the field
General
Type testing
Accuracy
Installation conditions
Path failure simulation and exchange of components
Electronics design testing
Audit trail and operational practice
General
Verification process
Into operation
Operational diagnostics
Speed of sound
Absolute speed of sound comparison
Relative speed of sound comparison; footprint
Velocity ratios
Profile factor number
Other parameters
Audit trail during operation; inter-comparison and inspectio
Inter-comparison checks of multiple meters in series
Inspections
General
Zero flow checks
Visual inspection
Recalibration
General
Recalibration interval
Field recalibration
As-found laboratory recalibration
Handling in the field
Handling in the laboratory
Consequences and aftercare
Total operational uncertainty
Valve characterization and noise in a metering and regulatin
Introduction
Calculation method
General
Generation of noise by the control valve
Propagation of noise from the valve to the USM using attenua
Signal strength of the USM, Ps
Signal-to-noise ratio at the USM
M&R station design