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Page 36: of Offshore Engineer Magazine (Mar/Apr 2014)
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EPIC
A truss node in heat treatment.
Photo: Vulcan SFM.
Taking nodes to a new level been driven by project requirements–the
Deck, leg and truss nodes have 1300m water depth, harsh environment, been taken to a new level on and need for condensate storage.
Statoil’s massive Aasta Hansteen
In turn, the scale has driven further ? rsts. Supplier Vulcan SFM, a subsidiary spar development. of Shef? eld Forgemasters International,
Elaine Maslin reports.
believes the four cast deck connection nodes it is providing to connect the deck to the hull will be the largest cast nodal joints manufactured to date. Vulcan verything on the Aasta believes it will also be the ? rst time cast “
Hansteen project is on a nodes have been used within a spar truss
E different scale,” says Paul hull.
Mockford, design director at Shef? eld’s The largest offshore cast nodes previ-
Vulcan SFM. ously supplied by Vulcan were two
The entire project is peppered with 110-tonne trunnion nodes, used for lift- ? rsts. It will be the ? rst spar platform ing Statoil’s 9000-tonne Valemon jacket on the Norwegian Continental Shelf, into place in the Norwegian sector of the
Statoil’s ? rst spar development, the North Sea, in 2012 (OE: August 2012). largest diameter spar built globally, the They measured 4.6x4.4x3.7m.
The Aasta “That record was soon broken by the ? rst spar with condensate storage, and
Hansteen truss nodes (also known as leg nodes the ? rst deepwater ? eld development in spar, or heave plate nodes) in the hull for
Norwegian waters. illustration.
Image: Statoil.
Aasta Hansteen, weighing 117-tonne
The size of the hull, at 198m-tall, has
March 2014 | OE oedigital.com 38 000_0314_Epic2_Vulcan.indd 38 2/21/14 1:54 PM