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Installation of the critical 343-kilometre northern section of the world’s longest subsea pipeline linking Russia’s vast natural gas reserves with the European Union via the Baltic Sea.
Company: Saipem (Nord Stream AG)
Location: Russian Federation, Baltic Sea
20 – 95 m
Water depth
Scope of work
- Engineering, procurement & installation of twin 343-km (north & south sections), 48-inch CWC pipeline
- Survey support
- Pipe haul & logistics
48-inch
CWC pipeline
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Specials & challenges
- Longest (1224 km) and heaviest (48-inch O.D. with concrete-weight-coating) subsea pipeline ever installed
- Working for the first time in the Russian Federation (permits and licences)
- Logistics and materials supply (multiple pipe haul vessels) with client-free line pipe issued in Finland resulting in frequent border crossings
- Pipeline installation in curves over pre-installed span and cable crossings, over 20 m wide rock berms with a tolerance of approximately 6 m across designated centre line
- Development and first-time use of a A&R stretcher
- Installation within +/– 25 m security corridor (potential interferences during pipelay with ordnance in the vicinity)
- Extreme winter conditions in the northern Baltic Sea
- Solitaire averaged a 3 km/day production rate in the Baltic Sea while working in frozen seas
1224 km and 48-inch
Longest and heaviest subsea pipeline ever installed
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