Krylov State Research Center has developed a conceptual design of a pipe-laying ship. According to the Center’s press service, these vessels will be deployed to the maximum in view of large-scale plans for construction of buried subsea pipelines in Russia and other countries.
The vessel’s functions will include: laying of concrete coated steel pipes as well as flexible metal-reinforced plastic pipes in offshore waters at the depth of 20-500 m; storing, preparing, welding and laying of steel pipes with the diameter of up to 1,220 mm, length of up to 12-24 m, wall thickness of up to 30 mm, working pressure of up to 25MPa; paying out the pipes, hoses and cables through the tunnel flowing into a stinger in the middle part of the hull for ice protection.
The vessel is to have the following characteristics: class - КМ Arc4 [1] АUT1 ICS DYNPOS-2 EPP HELIDECK WINTERIZATION (-40ºС), displacement 81,200 tonnes, deadweight - 44,600 tonnes, length - 245 m, width 34 m, depth - 26 m, draught - 12 m, speed - 12 knots, propulsive output - 48 MWt, endurance 30 days, crew and personnel - 250 persons, stinger length 95 m, speed of pipe laying – up to 3 km/day.
Technical solutions of the vessel’s conceptual design: diesel-electric propulsion system, three fore and three stern rudder propellers. Combined positioning system: dynamic-positioning system (3 fore and 3 stern rudder propellers); anchor mooring system (6 fore and 4 stern anchor lines); centralized system for control of cargo and ballast operations; winterization system; improved environmental safety; two-compartment standard; special cargo cranes for concrete coated steel pipes; heliport; indoor preparing, welding and laying of steel pipes; means for deicing of structures and equipment.
The conceptual design developed by Krylov State Research Center meets the operating requirements for the Barents, Pechora and Kara Seas. It is the basis for the development of the technical design.
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