29 Flanged monopiles for Moray West OWF

DATE: September 17, 2024

29 FLANGED MONOPILES FOR MORAY WEST OFFSHORE WIND FARM

Between February 2024 and April 2024, the CAPE VLT-640 Quad was used by installation contractor DEME on board of its Offshore Heavy Lift DP3 installation vessel Orion to install 29 flanged monopiles with a bottom diameter up to 10 meters and a length of up to 91 meters for the Ocean Winds’ Moray West offshore wind farm in Scottish waters.

The CAPE VLT was chosen as a mitigation measure to prevent pile run. Additional features, such as certified pile handling and upending capabilities, helped make the installation process much more controlled, particularly in combination with the Dynamic Positioning system of the vessel and the state of the art installation tools from DEME. All 29 piles were installed within a total of just 60 days.

CAPE Holland is looking back on a great performance of the world largest CAPE VLT to date with no mechanical breakdown of the equipment which was all newly built, including the newly developed power units (PU-2600) which were also stacked to reduce required deck space.


Application details

Application
Monopile installation
Pile
Monopiles
Water depth
36-50m

PILE DETAILS

Pile type
Flanged
Pile model
Tapered
Pile length
Up to 91m
Pile weight
Up to 1,935t
Pile wall thickness
86-115mm
Pile diameter top
7.5m
Pile diameter bottom
Up to 10m
No. of piles
29 of 62 in total

PROJECT DETAILS

Period
Feb’24 – Apr’24
Sea
North Sea
Country
Scotland
Location
Moray Firth
Market
Offshore Renewables
System/end usage
Offshore Wind Turbine
Operator or end customer
Ocean Winds
Installation contractor
DEME
Type of vessel
Heavy Lift Floating mono hull DP3 Installation Vessel
Name of vessel and owner
Orion, DEME
Mode
Dynamic Positioning

Main Reasons for solution choice

UPENDING, LIFTING, DRIVING IN SINGLE OPERATION

VERTICALITY MONITORING DURING DRIVING

SELECTED EQUIPMENT

CAPE VLT-640

Equipment configuration
CAPE VLT-640 Quad
Eccentric moment
2,560kgm
Max. line pull
3,400t

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