Dutch Sif Holding N.V. has been awarded a contract for the production of all tubular components for the jacket of the BorWin gamma platform.
The contract includes the production of legs, bracings, pile sleeves and pin piles for the jacket.
The project is being undertaken by Petrofac in consortium with Siemens for the German-Dutch transmission grid operator TenneT.
The jacket for the BorWin gamma platform will be built by Heerema Fabrication Group and will house a Siemens HVDC station that will convert the alternating current produced by the offshore wind turbines to direct current before transmitting it onshore to the German high voltage grid.
The total volume of the tubulars for the platform amounts to approximately 8.6 ktons and production is planned in the last quarter of 2016 and the first half year of 2017.
Heerema Marine Contractors (HMC) will transport and install the jacket in the North Sea at a water depth of up to 40 metres and approximately 100 kilometres off the German coast.
TenneT is developing the offshore AC/DC converter platform BorWin gamma as part of the grid connection project BorWin3. Weighing in at 18,000 metric tonnes, BorWin gamma will be one of the heaviest HVDC platforms ever installed.
The installation is expected to commence in the summer of 2018. Once completed, it will transmit approximately 900MW of wind power.
The platform is scheduled to go online in 2019.