Sif products
Pin Piles & Jacket Tubulars
Our operational division Offshore Steel Structures (OSS) covers a wide range of products including Pin Piles and Jacket Tubulars, supplying offshore foundations components to the booming offshore wind farms market (both for turbines and substations), whilst ensuring energy security by supply to the oil and gas sector. The variety in needs and specifications is substantial, and our experience and custom-made machinery ensure that almost anything is possible.
Monopiles & Transition Pieces
Monopiles
Compared to other options, monopile foundations are popular due to their low manufacturing costs, low transport and installation costs, and low risk profile due to their flawless track record. More than 80% of the wind turbines currently installed in the North Sea are based on monopile foundations. Sif has over 20 years of experience in the manufacturing of monopiles. Sif has constantly invested in manufacturing capabilities in order to follow the technical developments in the monopile foundations industry. In fact, Sif is regularly one step ahead of the market, creating new possibilities for the use of monopiles as the preferred foundations solutions for future projects.
Transition pieces
The transition piece (TP) is a tubular structure made out of high-grade offshore steel. The TP is the second part of a wind turbine generator (WTG), which is directly connected to the monopile foundation and the WTG tower. The most common connection of a TP is with flanges or a grouted connection. The production process begins with rolling the steel plates; after that, the rolled steel plates are welded together. In order to weld steel plates of this size together, Sif uses highly automated welding systems. As a contractor, Sif provides the primary steel components for the TP. For the secondary steel package, coating and final completion of the TP structure, Sif has excellent collaborative relationships with industry-respected partners and subcontractors.