Sverdrup Steel’s partner company Fabtech was commissioned by Equinor to build footbridges to replace the existing footbridges on the Mongstad facility. The pre-existing bridges were constructed in painted carbon steel. Lean duplex was chosen as a more sustainable and durable solution. This made it is possible to have a lighter structure, less maintenance, and a reduced CO2 footprint. With expert assistance from its technical team of metallurgists, the change from carbon steel to Lean Duplex was made. The selected material grade was lean duplex acc. to EN 1.4362 / UNS S32304 in accordance to NORSOK M:120 – MDS YD37. Sverdrup supplied over 2000 meters of structural hollow sections in addition to plates and hot rolled angle bars. All the items were provided in lean duplex and delivered from the company’s site at Kløfta in Norway. The benefits of using lean duplex are many, but in this particular case, the main motive was that Lean Duplex offers an almost maintenance-free product and low lifecycle cost. The result is inherently sustainable and the perfect example of how Lean Duplex can decrease the total CO2 emission.
Lean Duplex is the ultimate material for construction with special requirements for general corrosion resistance.