Alderley AlderleyApplication Notes
Crude Oil Metering
Project Name: Dunlin Alpha Export Oil Metering Upgrade
Location: Dunlin Alpha, northern North Sea, approx. 195km north east of Shetland
EPC Contractor/Consultants: Amec
End User: Fairfield Energy (UK) Ltd.
Scope of Application
The scope of supply includes a replacement crude oil metering package consisting of 3 x 50% metering streams and master metering stream. Each stream is constructed from 4” LTCS 600# RF pipework and includes manual and Rotork actuated Oliver Twinsafe valves, ZaVeRo ball valves, MTM globe valves, a 3” 900# RF Emerson MicroMotion type CMF300M coriolis meter, Emerson pressure and temperature transmitters and a Leeds butterfly flow-balancing valve.
The package is not skid mounted due to very limited offshore access, instead the equipment is suspended from the overhead steels above a raised mezzanine area. The package also includes a 1600 x 600 x 2000mm control system with 4 x Emerson Floboss S600+ flow computers.
Dunlin Alpha
Technical excellence: delivered
During commissioning Before upgrade
Alderley Alderley
www.alderley.comRev. 1
Applicable Standards
DECC Guidance Notes for Petroleum Measurement, Issue 8
ISO 10790: Measurement of fluid flow in closed conduits - Guidance to the selection, installation and use of coriolis meters
ATEX 94/9/EC: Equipment in Flammable Environments
EMC 2004/108/EC: Electromagnetic Compatibility
LVD 2006/95/EC: Low Voltage Directive
MD 2006/42/EC: Machinery Directive
CE 93/68/EC: CE Marking
SI 1999:2001 (formerly PED 97/23/EC): Pressure Containment
Main Equipment
• Offshore laser scan survey
• 3” ANSI 900# RF Emerson MicroMotion type CMF300M coriolis meters
• 4” ANSI 600# RF double block and bleed with flanged bleed connections c/w Rotork IQT 1000 actuators
• 4” ANSI 600# RF double block and bleed with flanged bleed connections
• ½” ANSI 600# RF x ½” NPTF double block and bleeds
• 2” ANSI 600# RF x ½” NPTF double block and bleeds
• 2” ANSI 600# RF globe valve, straight pattern
• ¾” ANSI 600# RF ball valve
• 1” ANSI 600# RF ball valve
• Emerson 3144P temperature transmitters 4-20mA output, 4 wire PRT, HART + SMART
• Emerson 3051S pressure transmitters, 4-20mA output SMART + HART
• WIKA pressure gauges, 100 dia. glycerine filled, rear blow-out protection
• Control system 1600 x 600 x 2000mm c/w 4 Emerson Floboss S600+ flow computers
• Supervisory computer and associated software
• Offshore commissioning