Aasta Hansteen Spar and Topside Fabrication

This paper describes the fabrication of the world' largest and most complex Truss Spar Platform, Aasta Hansteen, built for the Norwegian Continental Shelf (NCS) to be operated by Equinor. It was built according to NORSOK standard, Norwegian governing laws and regulations and other Company requirements. Hyundai Heavy Industries (HHI) was awarded an EPC Contract (Engineering, Procurement, and Construction) for the Topside of Spar Platform, and HHI and TechnipFMC formed a Consortium responsible for the overall delivery of the Spar Hull. TechnipFMC was responsible for the design, engineering and equipment procurement, whereas HHI was responsible for Fabrication and delivery. This paper addresses the characteristics of the design of Aasta Hansteen Spar Platform and highlights critical aspects of the Construction Method of Spar Hull at HHI's offshore yard in Ulsan, Korea.