Cold-weather electrode employed on North Slope pipeline

A SPECIAL ELECTRODE WAS NEEDed for pipeline welding on BP Amoco's Northstar project at Prudhoe Bay.The project required the Houston Contracting Co. to lay approximately 12 miles of 10-in pipe offshore in a total project of 33 miles connecting a man-made production island with the infrastructure of the Trans-Alaska pipeline.One 48-in. OD, 0.562-in. WT segment crosses the Putuligayuk River. The offshore line is being laid in water 3-40 ft deep and buried a minimum of 7 ft below the seafloor. Pipe is being welded in heated tents then laid through a slot cut in the sea ice by special trenching machines. Welding progresses for BP Amoco's Northstar pipeline in Prudhoe Bay, Alas., with ...

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