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A steel pipe is coated in concrete in the Wasco coating plant on the island Ruegen, Germany, 11 September 2017. The concrete weight coating is necessary to provide the pipes with enough stability on the sea bottom. Wasco_s coating plant in Mukran will provide concrete coatings services for approximately 90.000 pipes; the coated pipes will be broght to interim storages along the projected pipelines by ship. Photo: Stefan Sauer/dpa | usage worldwide (KEYSTONE/DPA/Stefan Sauer)