Measurement solutions
Integrated Measurement, Analysis and Control
Engineered solutions for gas and liquid quantity-and-quality measurement, sampling, analysis and process control.
Gas Metering Systems
Gas quantity and fiscal-measurement solutions using orifice, ultrasonic and venturi technologies, integrated with pressure and measurement control.
Typical solution elements
- Orifice / Ultrasonic / Venturi Meter
- Flow Computer & Metering Control
- Pressure Regulation
- Sampling & Analysis
SKP's project-specific scope can cover engineering, procurement, skid fabrication and integration, FAT, installation and commissioning.
Quality and quantity
Measuring how much gas, and what gas: the skid and the analyzer house together
A custody-transfer point has two questions to settle. The metering skid answers how much gas passed — volume, mass and, with the composition, energy. The analyzer house beside it answers what that gas was — composition, heating value, water and hydrocarbon dew points, sulphur. When a contract sets limits on both, SKP delivers both as one package: the skid, the sample take-off and line, the house with its analyzers, and the flow computer that turns the two into a settled quantity of energy.
Drag to orbit, scroll to zoom. Choose a number to fly to that station.
Stations, in the order the gas meets them
Gas arrives from the pipeline at line pressure. Everything downstream is about settling two numbers for this stream: how much, and what.
Three Coriolis runs on one frame: duty, standby and master. The duty run measures mass flow continuously; the master run is put in series through the proving crossover to check it in service.
A probe reaching the centre of the pipe draws a small, representative sample, which a heated line carries to the analyzer house without letting anything condense on the way.
The sample is conditioned and shared between the analyzers: a chromatograph for composition and heating value, a sulphur chromatograph, and hydrocarbon and water dew-point analyzers.
The flow computer combines the metered quantity with the live composition: mass and volume at base conditions, heating value, and the energy delivered — the number the contract is settled on.
What each side settles
The skid settles quantity
- Mass and volume flow, totalised
- Pressure and temperature at the meter
- Meter verification in service (master meter, proving crossover)
- Flow computer, supervisory and metering reports
The house settles quality
- Composition by gas chromatograph, and from it heating value, Wobbe index and density
- Hydrogen sulphide and total sulphur
- Hydrocarbon dew point
- Water dew point
Together they settle the contract
- Energy delivered = quantity × heating value
- Proof that the gas met the specification when it passed
- One sample system, one house, one report chain
- Alarms on composition and dew point tied to the same clock as the flow
What SKP delivers as one package
- Metering skid: runs, meters, valves, headers, proving crossover, flow computer cabinet
- Sample probe, heated sample line and pressure reduction at the house
- Analyzer house: analyzers, sample conditioning, calibration gas, HVAC and pressurisation, marshalling
- Integration: flow computers, supervisory system, metering and analyzer reports, FAT, SAT and commissioning
Illustrative arrangement. The skid is the JAM ethane metering skid modelled from SKP's own engineering; the analyzer house is a typical layout. Distances and the sample-line routing are simplified, and no tag, line number or project data is reproduced.
Metering and control system architecture
An isometric view of a custody-transfer metering skid with three metered streams — duty, stand-by and master: from the transmitters and Ex d junction boxes in the hazardous area, through redundant flow computers, managed Ethernet switches and the supervisory station, to the Modbus TCP/IP links into the plant DCS.
