The production of every monopile starts in Roermond on a specialized production line for large diameters. A vast majority of the rolled and welded cans, cones and sections are shipped to Rotterdam, where they are assembled into complete monopiles. Primary steel for transition pieces as well as smaller or shorter monopiles are manufactured in Roermond. Transition pieces are fitted out with platforms, boat landings, etc. by a specialized partner.
Components for offshore steel structures are manufactured mainly in Roermond on a separate production line for smaller diameters. Depending on market requirements, this production line is also used to manufacture pin piles for jacket foundations for offshore wind energy projects. The production method for the primary steel for transition pieces and for oil and gas components is similar to the production method for monopiles.