Custody transfer metering systems for gases
Metering solution for natural gas
- Based on ultrasonic, Coriolis, turbine or DP flowmeters
- From initial design phase up to on-site commissioning and training
- Comprising flow metering skid, metering control cabinets, sampling and analyser systems, and all supervisory and validation software
KROHNE custody transfer metering systems are used throughout the entire natural gas value chain, from the high pressure production of (wet) gas, throughout refining operations, and in city gates that deliver natural gas to local gas grids or big consumers like power plants. KROHNE has vast experience in custody transfer metering systems, Underground Gas Storage (UGS) measurement stations and natural gas metering, before and during LNG liquefaction and regasification.
KROHNE takes full project responsibility for the metering systems, including metering skids with instrumentation, gas chromatographs and analysers, flow measurement computers, metering control cabinets and all supervisory and validation software. KROHNE metering systems are often designed as a master-duty configuration, where a Z-cross over allows periodical verification of the duty meters against the master meter. Also two ultrasonic flowmeters in series using a different path lay-out are common in gas systems, to provide a continuous cross-check between the two flow measurements. In both cases the diagnostic features of the flowmeters are used to guarantee maximum performance and lowest measurement uncertainty.
With instrumentation and custody transfer metering systems designed 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
- In-house development of instrumentation, flow computers and supervisory software guarantees seamless integration of custody transfer metering and diagnostic features
- Custody transfer ultrasonic flowmeters with different path configurations to avoid common mode errors
- Ultrasonic flowmeters included that do not require a flow conditioner to minimise pressure drop
- Local support in local language available from over 100 offices worldwide
- Single source responsibility for the system
- Compliance with international and local standards e.g. OIML R137, AGA9, MI-002
Typical applications
- Custody transfer metering systems and allocation measurement of natural gas
- Border stations, underground gas storage, city gates
- Power plant fuel gas supply
- High accuracy measurement for pipeline leak detection
- Also applicable to chemical and industrial gases such as hydrogen and nitrogen
Applications
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 V12
Ultrasonic flowmeter for custody transfer (CT) measurement of gases
- 12-chord meter, for high accuracy flow metering of natural gas
- CT: OIML R137 (class 0.5), MI-002, AGA9 etc.
- Many variants, extensive CBM diagnostics free of charge
- Flange: DN100…1600 / 4…64"; max. PN450 / ASME Cl 2500
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
OPTIBAR PM 5060
Pressure transmitter for process pressure and level applications
- Rugged design with fully welded metallic diaphragm suited to high pressure ranges and hygienic requirements
- 100 mbar…1000 bar / 1.45…14500 psi
- Various threads, flanges, aseptic and other connections
- 2-wire 4…20 mA/HART®, FF, Profibus-PA, Bluetooth®
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
Analyser houses and shelters
Analyser solution for crude oil, refined products and natural gas
- Quality measurements of crude oil, refined products and natural gas
- Supplied with new metering systems, or as a stand-alone upgrade to existing systems
- Engineered solutions based on customer preferred brands
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