Svanen

Svanen

The Svanen, used in the construction of an offshore wind farm off the Belgian coast

Ship data flag  Bahamas Ship type Floating crane Callsign C6LA2 home port Nassau, Bahamas Owner Ballast Nedam , Rotterdam Shipyard Astilleros y Talleres del Noreste (ASTANO), completed by Grootint Order 1990 Keel laying 1991

Ship dimensions and crew length 102.75 m ( Lüa ) width 71.80 m Draft Max. 4.5 m

Machine system Top speed 7 kn (13 km / h)

Furnishing crane Lifting capacity: 8,700 t Lifting height: 76 m maximum lifting speed at maximum load: 0.35 m / min

Others Classifications Lloyd's Register of Shipping Registration numbers IMO no. 9007453

The Svanen , also HLV Svanen , is a very large floating crane , which is mainly used for assembly work on bridges or offshore wind farms . HLV stands for H eavy L ift V essel (German for heavy-duty ship ) and Svanen is the Swedish word for swan .

With a lifting capacity of 8,700 tons, the Svanen is the most powerful floating crane in the world with a single lift. Only the three semi- divers Thialf , Saipem 7000 and Sleipnir have a larger capacity with 14,200 t, 14,000 t and 20,000 t, but only achieve this with the use of two cranes ("tandem lift"). The floating crane Svanen sails under the flag of the Bahamas .

history

The ship was planned in 1990 by the Storebælt Group for the installation of the western bridge over the Great Belt , the Storebælt Bridge . The draft Svanen took over the Dutch company Gusto Engineering , which already many work boats and floating cranes had designed. It was initially built at the Astilleros y Talleres del Noreste (ASTANO) shipyard in El Ferrol, Spain . The Svanen was completed at the Zwijndrecht Grootint shipyard.

In the years 1994 and 1995, major renovations were carried out on the Svanen : The crane capacity was increased to 8700 t, the crane itself was increased by 26 meters and more powerful drives were installed. This enabled her to build the 13-kilometer Confederation Bridge in Canada.

Structure and technology

The Svanen is a self-propelled floating crane in catamaran design. The crane was developed to install prefabricated elements of large bridges. Among other things, it was used in the construction of the Øresund Bridge . Today the Svanen is mainly used to assemble offshore wind farms .

In the course of the work, the original crane capacity was increased from 6500 t: first to 6800 t, then 7800 t and finally to the current capacity of 8700 t.

The ship is propelled by two rotating propeller pods at the bow and two at the stern, which deliver 2400 kilowatts (kW) and 1250 kW respectively. Two side thrusters with 630 kW each are installed in the bow for support.

Well-known projects

• Storebælt Bridge
• Confederation Bridge
• Oresund Bridge

Operational restrictions

• maximum wind speed: 15 m / s
• maximum flow velocity: 1 m / s
• maximum wave height: 1 m

See also

• Overview of the most powerful floating cranes

Web links

Commons : Svanen (ship, 1991)  - collection of pictures, videos and audio files

• Company website of Ballast Nedam Offshore , the owner of Svanen (accessed May 23, 2009)
• Pictures of the Svanen on Nantus ( accessed on May 23, 2009)  ( page no longer available , search in web archives )

Individual evidence

1. ↑ ^{a b} History and technical data on the Gusto website . (No longer available online.) Archived from the original on March 26, 2009 ; accessed on January 20, 2019 . Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.  
2. ↑ Technical data of Svanen (English, PDF file, 1009 kB, viewed on May 23, 2009)  ( page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.