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NEW STANDARD OIL TANKERS
Source : Pacific Marine Review, Volume 38, November 1941.
Two more ships will shortly be added to the fleet of the Standard Oil Company of New Jersey. These vessels are the Esso Albany and Esso Trenton. successors to ships previously so christened but subsequently acquired by the Navy and renamed USS Sabine and USS Sangamon.
The new Esso Albany was launched by the Sun Shipbuilding and Dry Dock Company at Chester, Pa., on August 2, sponsored by Mrs. G. W. Gordon. The Esso Trenton was christened at the same yard by Mrs. C. H. Lieb on September 6.
The particulars of these two sister tankers are given in the table herewith.
Principal Characteristics.
The Vessels are constructed on the longitudinal friming system, the hulls having cruiser form sterns with flared bows. There are two steel masts, the foremast being equipped with two cargo booms, each of five tons capacity: and there are two steel kingposts
amidships. Each ship carries four 22-foot metallic lifeboats
The ships are built and equipted in strict conformity with the existing regulations of the Bureau of Marine Inspection and Navigation, the American Bureau of Shipping, the regulations of the U.S. Public Health Service and other requirements for petroleum carriers.
The navigating facilities include installation of Sperry gyro compass and gyro steering control; Fathometer: RMCA radio and auto alarm equipment.
Propulsion
The propelling machinery for each vessel consists of a high-pressure ahead turbine and a low-pressure ahead turbine in series, transmitting power to the propeller through double reduction gearing. The astern turbine is incorporated in the low-pressure
turbine casing. The turbines are of the latest design, impulse type, as manufactured by the General Electric Company. The double reduction gears are also of General Electric manufacture.
The turbines are designed to deliver, for normal operation. 9000 shp to the propeller at 90 rpm when supplied with steam at 435 lbs. gage pressure and 730° F. total temperature at the steam chest of the turbine, and exhausting at 28' 4" vacuum in the condenser, while steam as required is extracted for feed water heating. The astern turbine develops. for continuous operation, 80 per cent of the normal ahead torque at 50 per cent of the normal ahead rpm with normal ahead steam flow. The reduction gears are of the double helical line-pitch type.
Boilers
Steam is supplied on each ship by two Babcock & Wilcox two-drum express-type watertube boilers, each of 5250 sq. ft. of heating surface and 1347 sq. ft. of economizer heating surface, fitted with superheaters and de- superheaters. Each boiler under maximum conditions is suitable to supply 54,197 lbs. of superheated steam per hour at 450 lbs. gage pressure and 764° F. steam temperature at the superheater outlet. The boilers are fired by Todd “Hexpress" burners.
The steam pressure and furnace conditions are controlled automatically by means of a boiler draft control and a combustion control system.
There are three horizontal, twostage, double inlet on the first stage, bronze body and bronze rotors, hydraulically balanced centrifugal main cargo pumps installed in the cargo pumproom. They are driven by electric motors in the engine room, to which they are connected by means of a solid coupling, a floating shaft and a flexible coupling.
The electrical system consists of two 240-volt dc, 400 kw steam turbo-generators and 150 kw port service turbo-generator located on the generator flat.
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