ISO 10790:2015
Measurement of fluid flow in closed conduits — Guidance to the selection, installation and use of Coriolis flowmeters (mass flow, density and volume flow measurements)
ISO 10790:2015 gives guidelines for the selection, installation, calibration, performance, and operation of Coriolis flowmeters for the measurement of mass flow and density. This International Standard also gives appropriate considerations regarding the type of fluids measured, as well as guidance in the determination of volume flow and other related fluid parameters.
NOTE Fluids defined as air, natural gas, water, oil, LPG, LNG, manufactured gases, mixtures, slurries, etc.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
3.1 Definitions specific to this Coriolis flowmeter standard
3.2 Definitions from VIM, ISO/IEC Guide 99 (JCGM:2012)
3.3 Symbols
3.4 Abbrevations
4 Coriolis flowmeter selection criteria
4.1 General
4.2 Physical installation
4.2.1 General
4.2.2 Installation criteria
4.2.3 Full-pipe requirement for liquids
4.2.4 Orientation
4.2.5 Flow conditions and straight length requirements
4.2.6 Valves
4.2.7 Cleaning
4.2.8 Hydraulic and mechanical vibrations
4.2.9 Pipe stress and torsion
4.2.10 Crosstalk between sensors
4.3 Effects due to process conditions and fluid properties
4.3.1 General
4.3.2 Application and fluid properties
4.3.3 Multiphase flow
4.3.4 Influence of process fluid
4.3.5 Temperature effects
4.3.6 Pressure effects
4.3.7 Pulsating flow effects
4.3.8 Viscosity effects
4.3.9 Flashing and/or cavitation
4.4 Pressure loss
4.5 Safety
4.5.1 General
4.5.2 Hydrostatic pressure test
4.5.3 Mechanical stress
4.5.4 Erosion
4.5.5 Corrosion
4.5.6 Housing design
4.5.7 Cleaning
4.6 Transmitter (secondary device)
4.7 Diagnostics
5 Inspection and compliance
6 Mass flow measurement
6.1 Apparatus
6.1.1 Principle of operation
6.1.2 Coriolis sensor
6.1.3 Coriolis transmitter
6.2 Mass flow measurement
6.3 Factors affecting mass flow measurement
6.3.1 Density and viscosity
6.3.2 Multiphase flow
6.3.3 Temperature
6.3.4 Pressure
6.3.5 Installation
6.4 Zero adjustment
6.5 Calibration of mass flow measurement
7 Density measurement
7.1 General
7.2 Principle of operation
7.3 Specific gravity of fluids
7.4 Density measurement uncertainty
7.5 Factors affecting density measurement
7.5.1 Temperature
7.5.2 Pressure
7.5.3 Multiphase (Two phase)
7.5.4 Flow effect
7.5.5 Corrosion and erosion
7.5.6 Coatings
7.5.7 Installation
7.6 Density calibration and adjustment
7.6.1 General
7.6.2 Manufacturer’s density calibration
7.6.3 Field density calibration and adjustment
8 Volume flow measurement at metering conditions
8.1 General
8.2 Volume calculation
8.3 Gas as a process fluid
8.4 Volume measurement uncertainty
8.5 Special influences
8.5.1 General
8.5.2 Empty pipe effect
8.5.3 Multiphase fluids
8.6 Factory calibration
8.6.1 Mass flow and density
8.7 Volume check
Annex A (informative) Calibration techniques
Annex B (informative) Safety guidelines for the selection of Coriolis flowmeters
Annex C (informative) Considerations for multi-component liquid systems
Annex D (informative) Miscible liquids containing chemically non-interacting components
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
3.1 Definitions specific to this Coriolis flowmeter standard
3.2 Definitions from VIM, ISO/IEC Guide 99 (JCGM:2012)
3.3 Symbols
3.4 Abbrevations
4 Coriolis flowmeter selection criteria
4.1 General
4.2 Physical installation
4.2.1 General
4.2.2 Installation criteria
4.2.3 Full-pipe requirement for liquids
4.2.4 Orientation
4.2.5 Flow conditions and straight length requirements
4.2.6 Valves
4.2.7 Cleaning
4.2.8 Hydraulic and mechanical vibrations
4.2.9 Pipe stress and torsion
4.2.10 Crosstalk between sensors
4.3 Effects due to process conditions and fluid properties
4.3.1 General
4.3.2 Application and fluid properties
4.3.3 Multiphase flow
4.3.4 Influence of process fluid
4.3.5 Temperature effects
4.3.6 Pressure effects
4.3.7 Pulsating flow effects
4.3.8 Viscosity effects
4.3.9 Flashing and/or cavitation
4.4 Pressure loss
4.5 Safety
4.5.1 General
4.5.2 Hydrostatic pressure test
4.5.3 Mechanical stress
4.5.4 Erosion
4.5.5 Corrosion
4.5.6 Housing design
4.5.7 Cleaning
4.6 Transmitter (secondary device)
4.7 Diagnostics
5 Inspection and compliance
6 Mass flow measurement
6.1 Apparatus
6.1.1 Principle of operation
6.1.2 Coriolis sensor
6.1.3 Coriolis transmitter
6.2 Mass flow measurement
6.3 Factors affecting mass flow measurement
6.3.1 Density and viscosity
6.3.2 Multiphase flow
6.3.3 Temperature
6.3.4 Pressure
6.3.5 Installation
6.4 Zero adjustment
6.5 Calibration of mass flow measurement
7 Density measurement
7.1 General
7.2 Principle of operation
7.3 Specific gravity of fluids
7.4 Density measurement uncertainty
7.5 Factors affecting density measurement
7.5.1 Temperature
7.5.2 Pressure
7.5.3 Multiphase (Two phase)
7.5.4 Flow effect
7.5.5 Corrosion and erosion
7.5.6 Coatings
7.5.7 Installation
7.6 Density calibration and adjustment
7.6.1 General
7.6.2 Manufacturer’s density calibration
7.6.3 Field density calibration and adjustment
8 Volume flow measurement at metering conditions
8.1 General
8.2 Volume calculation
8.3 Gas as a process fluid
8.4 Volume measurement uncertainty
8.5 Special influences
8.5.1 General
8.5.2 Empty pipe effect
8.5.3 Multiphase fluids
8.6 Factory calibration
8.6.1 Mass flow and density
8.7 Volume check
Annex A (informative) Calibration techniques
Annex B (informative) Safety guidelines for the selection of Coriolis flowmeters
Annex C (informative) Considerations for multi-component liquid systems
Annex D (informative) Miscible liquids containing chemically non-interacting components
Bibliography