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Largest installation project in Allseas’ history, Nord Stream 2 is a dual 1200 km-long offshore natural gas pipeline that runs through the Baltic Sea from the St Petersburg region of Russia to the Baltic coast in north-east Germany connecting Europe to the world’s largest reserves in Northern Russia.
Company : Nord Stream 2 AG
Location : Baltic Sea (Russia, Finland, Sweeden, Denmark & Germany)
15 – 210 m
Water depth
Scope of work
- Pre-lay route survey & seabed preparations (incl. installation of approx. 1000 mattresses)
- Pipe haul from marshalling yards & associated logistics
- Installation of approximately 2300 km of 48-inch concrete-weight-coated pipeline
- As-laid survey
2300 km
48-inch concrete-weight-coated pipeline
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Specials & challenges
- Largest pipeline installation scope in Allseas’ history
- Mobilise fleet to Baltic Sea
- Modification of Audacia to anchor lay vessel for shallow water scope in German waters
- Permit restrictions in German waters resulting in 3-month installation window and no DP in water depths less than 20 m (~75 km of the route)
- Curved pipelay through Finnish waters over preinstalled span & cable crossings
- Pipe haul of approx. 200,000 pipe joints
- Severe Baltic Sea winter conditions
200,000
pipe joints
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