Abstract:
A method for building a liquefied-gas-carrier wherein a lower hull subassembly having a tank mounted thereupon is inserted into an upper hull subassembly assembled at a predetermined place on a shipway and are joined to each other to thereby form a unit tank section, and a plurality of unit tank sections assembled in the same manner are joined one by one to build the hull of the ship.
Abstract:
A spacer is interposed between the edges to be connected of two steel frame column members H-shaped in section formed by welding or rolling, so as to form square grooves of a narrow gap between the flanges of said two steel frame column members to be connected by welding.
Abstract:
The dimensions of the membrane tank are so selected that when it is cooled by liquefied gas charged therein and contracted, the flat portions may just contact with the inner surfaces of an insulating material lined over the inner wall of a shell structure. Restraining forces are applied to the membrane tank when the latter is installed into the insulating material structure. When the liquefied gas is charged into the membrane tank, the bending stresses generated are almost zero and the tank is subjected only to the hoop tensions.
Abstract:
A scaffolding unit for shipbuilding is provided which comprises a main body which in turn comprises a carriage and a plurality of scaffoldings or working platforms erected upon the carriage, and a pair of wings disposed on the longitudinal sides of the main body for the works of decks between the hatches, the decks outside of the hatches and the side shell platings.
Abstract:
Guide sheave frames are suspended between a trolley and a sheave block so as to control the angles between the ropes for lifting or lowering the sheave block which are suspended in the form of V between the trolley and the sheave block. In loading or unloading the guide sheave frames are adapted to be spaced apart by a suitable distance from or engaged with each other.
Abstract:
A method for loading bulk materials is provided in which a telescopic chute and the pile of bulk materials are maintained within a predetermined range and the bulk materials are discharged while maintaining the volume in the telescopic chute in excess of a predetermined volume and the discharge of bulk materials is stopped when the volume of bulk materials in the telescopic chute is decreased less than a predetermined volume. In discharge operation, the dust rises only in the telescopic chute and may be collected. A telescopic chute is also provided which is best adapted to carry out the method of the present invention.