Crude/Chemical/Products Tanker Delivered By Wartsila's Turku Yard
The Turku Shipyards of Oy Wartsila ab in Finland recently delivered the 19,999-dwt products tanker Kihu to Neste Oy, the national oil company of Finland. Less than a year elapsed between her keel laying and delivery. The ship is classed by Lloyd's Register of Shipping + 100 Al, Chemical Tanker, + LMC, IGS, Ice Class 1A. She is an IMO type II/III chemical tanker for worldwide trading of crude oil, refined petroleum products, and type II/III chemicals including benzene, styrene monomer, caustic soda, molasses, urea, solvents, and alcohols.
The vessel has an overall length of about 528 feet, molded beam of 75.8 feet, molded depth to upper deck of 46.6 feet, and draft of 33.2 feet.
Total cargo tank capacity (100% full) is 26,644 cubic meters.
Main engines, auxiliary engines, boilers, and inert gas generator are all designed to run from start to stop on one grade of fuel oil—3,500 seconds Redwood at 100 F.
The Wartsila/Pielstick 6PC4.21- 570 main engine is coupled through a reduction gear to a KaMeWa controllable- pitch propeller. The engine has a maximum continuous rating of 9,776 bhp at 400 rpm; service speed operating at 82 percent of mcr is 15.5 knots. The ship is fitted with a controllable-pitch bow thruster powered by a 1,340-hp electric motor.
Three Wartsila-Vasa 6R22HF auxiliary diesels are direct-coupled to Stromberg alternators of 935 kva, 450 volts, 60 Hz each. Two oil-fired steam boilers and one exhaust gas steam boiler are installed for ship's service, which include heating of cargo and ballast tanks and cargo tank washing water.
The hull is divided, by two longitudinal and 11 transverse bulkheads, into 10 center tanks and eight wing tanks for cargo, six wing tanks for water ballast, and two slops tanks. Transverse bulkheads are stiffened by corrugations; longitudinal bulkheads in the center cargo tanks are smooth, with stiffeners in the wing tanks. The center tanks are coated with pure epoxy; cargo side tanks are coated with zinc silicate.
Despite being a ship of less than 150 meters BP (492 feet) and less than 20,000 dwt, the Kihu incorporates some of the more stringent requirements applicable to larger vessels. Her damage stability meets most requirements valid for ships above 150 meters; she is fitted with crude oil washing and inert gas systems; and she has segregated ballast water tanks with capacity sufficient for the ship to operate in heavy ice conditions. Hull and propulsion machinery are designed for these conditions, above the requirements of Lloyd's Register Ice Class notation.
The four segregated cargo system are designed for efficient operation; discharging time is about 12 hours, and loading and deballasting time is about five hours. A cargo computer is connected on-line with level transmitters of cargo, ballast, and bunker tanks, cargo tank temperature system, draft sensors fore and aft, and an inclinometer.
Each cargo tank is equipped with one vertical, centrifugal, hydraulically driven pump of Thune Eureka manufacture. For cargo heating, 18 Sunrod heaters are installed on the main deck. One Maritime Protection inert gas generator is installed in a deckhouse aft. Its capacity is 3,300 cubic meters per hour with a maximum pressure of 0.2 bar.
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