Nord Stream Completes the Most Challenging Part of Natural Gas Pipeline through the Baltic Sea

 

Nord Stream today announced that the world’s largest pipelay vessel Solitaire (photo) has completed work on line 1 of the twin pipeline. Two of three sections of line 1 of the natural gas pipeline are now complete. In total, more than 83,300 pipe segments have been laid over a distance of 1,000 kilometres. The remaining part will be constructed by Saipem’s Castoro Sei pipelay vessel by April 2011.

“We have completed this most challenging part of the pipeline through the Baltic Sea on schedule and have now laid over 80 percent of line 1 of the twin pipeline,” says Nord Stream Deputy Director of Construction Ruurd Hoekstra. “Together with our main contractor Saipem we chose Allseas’ dynamically-positioned pipelay vessel Solitaire to lay part of this section because it operates without anchors, so that only the pipeline itself touches the seabed along the precise route agreed with the Finnish authorities. This has been an added safety guarantee for us in this congested area of the Baltic Sea known for its historic mine lines. I am pleased to say that everything has gone according to plan,” he added.

“The smooth running of our construction programme has been made possible by the meticulous planning of every aspect – technical, logistic, safety, environmental and operational – of this complex infrastructure project, which we developed in consultation with the authorities of all five countries through whose waters the pipeline will pass,” Mr Hoekstra added.

The connection of the three major pipeline sections will be carried out at the two offshore locations where the design pressure changes: from 220 to 200 bar and from 200 to 170 bar respectively. The Gulf of Finland and central sections will be connected off the coast of Finland in spring at a sea depth of approximately 80 metres. The connection of the central and south-western sections off the coast of Gotland, Sweden, to take place in summer at a depth of approximately 110 metres, will mark the completion of construction of line 1.

Source:Nord Stream, February  4, 2011; Image: Allseas

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