Stalatube delivered stainless steel hollow sections, made of LDX 2101® material, to Tampere Energy Production Ltd. for Palatsinraitti bridge and dam renovation project. The project started in 2009 and was finished in 2012. The project was particularly interesting due to the historic surroundings. Close attention needed to be paid to the landscape of Lake Näsijärvi and the demands of local authorities, since the bridge had to be built in the middle of a national heritage landscape.
Stainless hollow sections used in this project, made of Lean Duplex, were 300x300x8 and 6,5 m long. The chosen LDX 2101® has been proven to be a cost-effective duplex due to its lean alloying. Its nickel content is low, typically 1,5%. The low nickel content is very beneficial from a long-term price perspective.
These might have been the world’s biggest lean duplex hollow sections produced at that time. Tubes were cut to designed length and then perforated by tube laser. Tube lasering is extremely accurate with tolerances and also cost-effective – at least if there is a slightly bigger volume of hollow sections, which needs to be perforated.
Photo: Riitta Savola/Tampereen Sähkölaitos