Custody transfer metering systems for LNG
Metering solution for liquefied natural gas
- Based on ultrasonic or Coriolis cryogenic flow meters
- From large scale ship (un)loading to bunkering and truck loading
- Comprising flow metering skid, metering control cabinets, sampling and analyser systems, and all supervisory and validation software
KROHNE flow metering systems are used throughout the entire natural gas value chain, from high pressure production of (wet) gas throughout all refining operations, and down to city gates that deliver natural gas to local gas grids. Specifically for custody transfer metering (CT) of LNG at cryogenic temperatures, KROHNE developed a metering solution to measure both the volume and quality of LNG. With the first ultrasonic flowmeter for custody transfer LNG measurement released in 2007, KROHNE has over 10 years experience with high accuracy measurement under cryogenic conditions.
KROHNE takes full project responsibility for the system, including metering skids with instrumentation, gas chromatographs and analysers, flow computers, metering control cabinets and all supervisory and validation software. KROHNE LNG metering systems can be designed as a master-duty configuration, where a Z-cross over allows periodical verification of the duty meters against a master meter. The diagnostic features of the flowmeters are used to guarantee maximum performance and lowest measurement uncertainty of the system.
With instrumentation, metering and supervisory system from the same source, customers can rely on seamless integration of all components. KROHNE is established in the Oil & Gas industry since 1921 and has a local presence in over 100 countries to provide on-going support.
Highlights
- Ultrasonic flowmeters with integrated transducers can be fully insulated
- World-class Coriolis flow meters with an impressive LNG track record
- In-house development of flowmeters, flow computers and supervisory software guarantees seamless integration of metering and diagnostic features
- In house expertise to discuss custody transfer metering system approvals with local metrology offices
- Local support in local language available from over 100 offices worldwide
- Single source responsibility
Typical applications
- Loading and unloading of LNG carriers
- Check metering during bunker delivery of LNG
- Truck loading and truck fuelling
- Master or check metering during partial LNG offloading
Related products
OPTIMASS 6400
Coriolis mass flowmeter for advanced process applications
- High accuracy (±0.05% flat), for cryogenic to HT media (-200…+400°C / -328…+752°F); maintains operation over a wide range of gas fractions and complex flow conditions (EGMTM)
- SIL 2/3; CT: OIML R117, R137, MI-005, MI-002; API, AGA; hygienic certifications
- Flange: DN10…300 / ½…12", max. PN 160 / ASME Cl 1500
- 3 x 4…20 mA, HART®7, Modbus, FF, Profibus-PA/DP, PROFINET, EtherNet/IP™, Bluetooth®
ALTOSONIC 5
Ultrasonic flowmeter for custody transfer (CT) measurement in upstream and midstream applications
- Multipath inline meter for crudes, refined products, cryogenic media and chemicals
- CT: OIML R117, API compliant
- Flange: 4…24"; max. ASME Cl 600
- -200…+250°C / -328…+482°F
SUMMIT 8800
Flow computer for custody transfer (CT) measurement
- Cost effective solution due to modular hard- and software design
- Full colour graphical touch screen for maximum process transparency
- Easy operator access enabling time efficient maintenance
- Automatic Performance Monitoring extends recalibration interval
Related solutions
Supervisory Control Cabinets
Complete solution for process control
- Provides control of the metering system, including validation of field instrumentation
- Installed in a safe area, typically in a control room or dedicated building
- Supplied in combination with new metering systems, or for an upgrade to existing systems
Modular flow control and data transfer cabinets
Basic flow control solution
- Cost effective, modular metering control solution
- Based on the SUMMIT 8800 flow computer
- Installed in a safe area, typically in a control room
Flow computing
Flow computer solution for the visualisation of measurements
- Graphical representation of all measurements
- Fully pre-configured and tested according to customer requirements
- Different liquid and gas streams measured and displayed on a single flow computer
Metering houses and shelters
Turnkey housing solution for the installation of electronic systems and cabinets on-site
- A safe area for the installation of electronic equipment and cabinets
- Integrated HVAC system where required
- Local operator supervisory work station can be included
Sampling systems
Automatic sampling solution for liquid hydrocarbons
- Sampling systems for stand-alone use, or integrated into the flow metering systems
- In-house design, manufacturing, commissioning and testing
- Fully assembled and tested prior to shipping
- Engineered solution to meet any special project specifications
Ball provers
Standalone or fully integrated prover solution
- Engineered solutions optimised for the customer processes
- Stand alone or integrated into the metering skid
- Uni- and bi-directional, with diameters from 3" to 36"
Mobile provers
On-site master metering solution
- On-site meter verification against a mobile master meter
- Cost effective solution due to sharing between different locations
- Lowest measurement uncertainty by periodic verification of prover against national and international standards
- Engineered prover solution optimised for specific applications
Calibration runs and skids
Calibration solution for liquids and gases
- Comparable systems to those used during the manufacture of KROHNE flowmeters
- Flexible concept, with a design tailored to the requested application range of the flow control
- Available with calibration in accordance with national and international standards
SynEnergy Supervisory and visualisation software
Solution for continuous process monitoring and reporting
- HMI/SCADA software for measurement solutions
- State of the art HTML5 secure web technology
- Optimisation of operation results due to predictive maintenance
- Easy integration into existing DCS and ERP networks
CalSys Analyser Management software
Solution for analyser management and data acquisition (AMADAS)
- Effective performance monitoring of quality measurement instruments (QMI)
- Automated analyser validation and statistical process control
- Complies with international standards and methods (ASTM D3764, ASTM D6299, OP 97-30425 etc.)
- Increased availability of gas chromatographs and critical process analysers
Related services
Consultancy & engineering for metering systems
From metrology concepts through to design and testing
- Consultancy regarding local and international metrology requirements and certifications
- Cost effective engineering concepts tailored to application and installation
- Detailed design of mechanical setup, instrumentation, E&I and software
- Site survey and feasibility studies for specific process or technical requirements
- Assistance during project execution
Start-up & commissioning for metering systems
On-site support by dedicated KROHNE engineers
- Onsite commissioning services for on- and offshore metering systems
- Consultancy during the implementation of systems using KROHNE and non-KROHNE products
- Assurance of smooth and continuous operations in the field
- Site acceptance testing (SAT) to verify the system is working according to requirements
System calibration & validation for metering systems
Additional diagnostics and monitoring to achieve optimal performance of the system
- KROHNE certified validation with full audit trail
- On-site or laboratory calibration of instruments
- Adjustments according to application requirements
- Uncertainty calculations with all parties involved
- Periodical inspection, including environmental and metrological certification
Operation & maintenance for metering systems
Support for on-going diagnosis and system health checks
- Maintenance contracts and service level agreements
- Pre-defined service rates and response times
- 24/7 Customer support and emergency helpdesk
- Periodic health checks and software updates
- Troubleshooting using a remote link or by an engineer on-site
Training for metering systems
Full range of workshops and seminars related to products and measurement solutions
- Basic principles of metering systems
- Individual training sessions for operational, engineering and maintenance personnel
- Customised project training and engineering background