Dillinger heavy plate for the
highly innovative Kaskasi offshore wind farm

Dillinger steel involved in innovative technology

The Kaskasi wind farm is an offshore wind farm of RWE located in the North Sea, about 35 km north of the island of Helgoland. It covers an area of about 17 km² and consists of 38 wind turbines of the Siemens Gamesa SG 8.0-167 DD Flex type. The 342-megawatt wind farm can mathematically supply green electricity to about 400,000 households per year. This is the equivalent of a large city like Frankfurt am Main.

Each turbine rests on a 65 m long, 660 t monopile foundation.

These monopiles are driven to a depth of 18 to 25 meters into the seabed.

Innovative technologies

An innovative technology is celebrating its world premiere at the Kaskasi offshore wind farm: for the first time, special steel collars have been placed around three monopile foundations on the seabed. The so-called “Collared Monopile” was designed based on a patent developed by the operator RWE. Each collar, which is 7 m high and weighs 170 t, is designed to improve the behavior of the foundation structure compared to standard monopiles and increase the overall load-bearing capacity of these monopile foundations.

For the monopiles and the innovative steel collars, Dillinger supplied 28,715 t of heavy plate in grades S355ML, S355G10+M, S460G2+M, S420ML in thicknesses from 40 to 90 mm.