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The double-hulled Polar Endeavour. Although double-hulled tankers reduce the likelihood of ships grazing rocks and creating holes in the hull, a double hull does not protect against major, high-energy collisions or groundings which cause the majority of oil pollution, despite this being the reason that the double hull was mandated by United States legislation. [7]
Marine Board (1998). Double-Hull Tanker Legislation: An Assessment of the Oil Pollution Act of 1990 (1998). Marine Board Commission on Engineering and Technical Systems. Washington, D.C.: National Academy Press. ISBN 0-309-06370-1; Marine Log (2008). "The Liberty Ship and the T-2 Tanker (1941)". Ships of the Century. Marine Log.
These coils circulate fluid in the tank by convection, transferring heat to the cargo. All modern chemical tankers feature a double-hull construction. And most have one hydraulically driven and submerged cargo pump for each tank with independent piping, which means that each tank can load separate cargo without them being mixed.
Rotary table (#20) rotates, along with its constituent parts, the kelly and kelly bushing, the drill string and the attached tools and bit. Shale shaker (#2) separates drill cuttings from the drilling fluid before it is pumped back down the wellbore. Stand (#16) is a section of 2 or 3 joints of drill pipe connected and stood upright in the ...
Double-acting triple-expansion marine engine. High-pressure steam (red) passes through three stages, exhausting as low-pressure steam (blue) to the condenser. It is a logical extension of the compound engine (described above) to split the expansion into yet more stages to increase efficiency. The result is the multiple-expansion engine.
Marine propulsion is the mechanism or system used to generate thrust to move a watercraft through water. While paddles and sails are still used on some smaller boats , most modern ships are propelled by mechanical systems consisting of an electric motor or internal combustion engine driving a propeller , or less frequently, in pump-jets , an ...
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A "Scotch" marine boiler (or simply Scotch boiler) is a design of steam boiler best known for its use on ships. Sectional diagram of a "wet back" boiler. The general layout is that of a squat horizontal cylinder. One or more large cylindrical furnaces are in the lower part of the boiler shell. Above this are many small-diameter fire-tubes ...
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