Nord Stream 2

Scope of work

  • Pre-lay survey of the route
  • Pre-lay seabed preparations including installation of around 1000 mattresses
  • Pipe haul from marshalling yards and associated logistics
  • Installation of approximately 2300 km of 48-inch pipeline
  • As-laid survey

Project specials

  • Largest pipeline installation scope in Allseas’ history
  • Modification of Audacia to anchor lay barge for German shallow water scope
  • Permit restrictions in German waters resulting in three-month installation window and no DP in water depths less than 20 m (~75 km of the route)
  • Curved pipelay through Finnish waters over pre-installed span and cable crossings
  • Pipe haul of around 200,000 pipe joints
  • Mobilise fleet to Baltic Sea
  • Severe Baltic Sea winter conditions