Ruukki delivered, from its Kalajoki plant, the first batch of steel structures for offshore wind tower foundations to the Norwegian company Kvaerner Verdal AS. Deliveries from Kalajoki for the Nordsee Ost offshore wind farm project in the North Sea will continue until summer 2012. Ruukki’s delivery includes a total of 240 of individual structures to anchor the towers and join the structures together.
Each jacket requires one transition piece to join the wind turbine tower to the jacket foundation, which is partly submerged under the sea. The transition pieces Ruukki delivers are 12 metres in diameter and about five metres in height. Piles are used to anchor jacket foundations to the sea bed and Ruukki provides the pile clusters. Four pile clusters, which are around 3.5 metres in diameter and 5 metres in height, are required for each jacket.
RWE Innogy’s Nordsee Ost wind farm will be located about 3.5 kilometres offshore to the northeast of Helgoland on the German coast. The sea depth in the area is in the range of around 22 to 25 metres. The wind farm will be commissioned in 2013 and, when completed, will produce approximately 1.1 terawatt-hours of power per year, equivalent to the annual supply of more than 310,000 households.
More information about Ruukki’s offshore structures.
For further information, please contact: Mika Pottala, Unit Manager, Kalajoki plant, Ruukki Engineering, tel. +358 50 56 46 011.
Rautaruukki supplies metal-based components, systems and integrated systems to the construction and engineering industries. The company has a wide selection of metal products and services. Rautaruukki has operations in 27 countries and employs 11,700 people. Net sales in 2010 totalled EUR 2.4 billion. The company’s share is quoted on NASDAQ OMX Helsinki (Rautaruukki Oyj: RTRKS). The Corporation uses the marketing name Ruukki.
www.ruukki.com
