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BS ISO 21903:2020 Refrigerated hydrocarbon fluids. Dynamic measurement. Requirements and guidelines for the calibration and installation of flowmeters used for liquefied natural gas (LNG) and other refrigerated hydrocarbon fluids >
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BS ISO 21903:2020 Refrigerated hydrocarbon fluids. Dynamic measurement. Requirements and guidelines for the calibration and installation of flowmeters used for liquefied natural gas (LNG) and other refrigerated hydrocarbon fluids, 2020
- undefined
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms, definitions and abbreviated terms
- 3.1 Terms and definitions
- 3.2 Abbreviated terms
- 4 Flowmeter selection
- 4.1 Considerations of meters specific to LNG metering
- 4.2 Coriolis flowmeter
- 4.3 Ultrasonic flowmeter
- 5 Process conditions
- 5.1 Temperature effects
- 5.1.1 Loading procedures
- 5.1.2 Temperature effects on CMF measurements
- 5.1.3 Temperature effects on USM measurements
- 5.2 Pressure effects
- 5.2.1 Coriolis flowmeter
- 5.2.2 Ultrasonic flowmeter
- 5.3 Mechanical vibrations
- 5.3.1 Coriolis flowmeter
- 5.3.2 Ultrasonic flowmeter
- 5.4 Cavitation
- 5.4.1 Coriolis flowmeter
- 5.4.2 Ultrasonic flowmeter
- 5.5 Thermodynamic properties of LNG
- 6 Installation
- 6.1 Valves
- 6.2 Swirl and non-uniform profiles
- 6.2.1 Coriolis flowmeter
- 6.2.2 Ultrasonic flowmeter
- 6.3 Flow conditioners
- 6.4 Pipe stress and torsion
- 6.4.1 Coriolis flowmeter
- 6.4.2 Ultrasonic flowmeter
- 6.5 Flowmeter installation recommendations
- 6.5.1 Coriolis flowmeter
- 6.5.2 Ultrasonic flowmeter
- 6.6 Crosstalk and sensitivity to noise
- 6.6.1 Coriolis flowmeter
- 6.6.2 Ultrasonic flowmeter
- 6.7 Zero offset — Verification and adjustment procedures
- 6.7.1 Coriolis flowmeter
- 6.7.2 Ultrasonic flowmeter
- 6.8 Temperature management
- 6.8.1 Thermal insulation
- 6.8.2 Cooling procedure
- 6.8.3 Warming procedure
- 7 Calibration
- 7.1 General considerations
- 7.2 Calibration in a laboratory
- 7.2.1 Gravimetric method
- 7.2.2 Master meter method
- 7.3 Calibration in situ
- 7.3.1 Gravimetric method using a weighbridge
- 7.3.2 Road tanker temporarily on weighbridge
- 7.3.3 Measurement uncertainty
- 7.4 Interconnected pipe volume
- Annex A (informative) Working principle Coriolis flowmeter
- Annex B (informative) Working principle of the ultrasonic flowmeter
- Annex C (normative) Hardware for an LNG calibration facility
- Annex D (informative) Examples of calibration data
- Annex E (normative) Alternative calibration procedure based on alternative liquids
- Annex F (informative) Thermodynamic properties of LNG
- Bibliography [Go to Page]