دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: any shipboard tank or tanker compartment normally used for carrying saltwater ballast. When these compartments or tanks are not connected with the cargo system, they are called segregated ballast tanks or systems.

n: the empty space between two bulkheads that separates two adjacent compartments. It is designed to isolate the two compartments from each other, thereby preventing the liquid contents of one compartment from entering the other in the event of the failure of the bulkhead of one to retain its tightness. In oil tankers, cargo spaces are always isolated from the rest of the ship by cofferdams fitted at both ends of the tank body.

n: tanker with two hulls. Theoretically, the first hull absorbs all or most of any impact, leaving the second hull intact or less damaged and thus able to contain the cargo.

n: (GVW) a free-running propeller mounted on or near the shaftdriven main propeller of a ship or tanker ship. The Grem vane wheel turns like a windmill because of the high-speed flow of water created by the main propeller. A GVW improves efficiency and thus can increase a ships speed without additional power.

n: (lMCO) an international organisation that regulates maritime practices, including possible pollution of the oceans by tanker-cleaning effluent. Later became International Maritime Organisation.

n: an offshore system to which the production from several wells located on the seafloor is routed and to which a tanker ship ties up to load the produced oil. The tanker is moored to a single point on the buoy and is thus free to rotate around it, depending on wind and current directions.

n: a tanker with a capacity over 100,000 deadweight tons (90,720 dead weight tonnes). Supertankers with a capacity larger than 100,000 deadweight tons but less than 500,000 deadweight tons (45,360 deadweight tonnes) are called very large crude carriers. Those with a capacity over 500,000 deadweight tons are called ultralarge crude carriers.

n: see tanker.

n: a ship designed to transport oil, LPG, LNG, or SNG. Tankers whose capacity is 100,000 deadweight tons (90,720 deadweight tonnes) or more are supertankers, either very large crude carriers or ultralarge crude carriers. Also called a tank ship.