Abstract: In the construction of a large, land-based skirt-supported spherical tank, the tank is partially prefabricated, its bottom polar cup section being produced ready for mounting and stored inside the rest of the spherical shell. In this state, wherein the transportation height of the tank has been substantially reduced, the as yet unfinished spherical tank is transported to the erection site, where the bottom polar cap section is lowered into position and secured to the rest of the spherical shell.

Abstract: In an insulated spherical tank for containing liquefied gas, said tank comprising a support in the form of a vertical, partially thermally-insulated skirt which forms a unified structure with the tank wall, wherein the insulation in the wedge-shaped region between the skirt and the spherical tank is sealingly joined, the sealed joint is secured with a mechanical connection.

Abstract: Mooring systems for floating vessels positioned off-shore. A rigid column extends from the sea floor and provides a single-point mooring for a barge or other floating structure which includes facilities for storing oil or liquified gases. The barge may also include facilities for liquefying gases. A fluid line for oil or gas extends from below the water line inside the vertical column to the mooring point above the water line. A pair of mooring arms is pivotally attached to a table pivoted on the mooring point, and the arms diverge with their other ends attached to the barge at zones spaced from each other. The arms are extensible and each of them has a compensator which tends to hold each arm to a predetermined length. Each compensator also restrains the rate of movement during extension and contraction of its arm. A fluid-flow line extends from the mooring point to the barge with flexible interconnections between the fluid-flow lines above the water line.

Abstract: The transportation of oil and gas under high pressure in tanks on board a ship is carried out by loading and unloading the oil/gas utilizing a suitable pressurized liquid, for example water, in the individual tanks, whereby during loading, a tank or a group of tanks containing pressurized liquid are filled with oil and gas while the pressurized liquid simultaneously is displaced into the next tank or group of tanks which are to be filled, after which the said next tank/group of tanks are filled and the pressurized liquid displaced into a third tank/group of tanks, etc., and that during unloading, the cargo in one tank or one group of tanks is removed by introducing a pressurized liquid into the tank/group of tanks, and unloading of the cargo in the next tank/group of tanks occurs by transferring the pressurized liquid from the said first tank/group of tanks to the next.

Abstract: Machinery arrangement for LNG ships consisting of a diesel engine and a combined gas turbine-steam turbine-electrical system. The diesel engine and the electromotor drive a vp-propeller. The diesel engine burns only bunker oil, while the combined gas turbine-steam turbine plant burns boiled off gas from the cargo.

Abstract: A spherical tank is supported by a vertical skirt extending from the tank equator down to a foundation. An enclosed space defined by the spherical tank, the skirt and the foundation is made pressure tight and is connected to a pressure-regulating system, thus permitting regulation of the pressure within the space.

Abstract: In a spherical tank having a central vertical tower, the tower is rigidly connected to the tank shell at both ends, preferably by welding. The top of the spherical tank may be flattened in the area around the tower.

Abstract: A conical transition between the vaulted upper part of a tank onboard a ship and the tank dome is disclosed. This conical transition or cone solves vibration problems in the tank by increasing the natural frequency of the tank dome.

Abstract: A leak protection system on a tank for storing or transporting liquefied gas, having leak collection means which open out above a catch basin placed beneath the tank. The catch basin is of sufficiently large dimensions to permit the gradual evaporation of the leaked material, and is subdivided into a plurality of cells.

Abstract: A tank for holding liquefied gas and including a support in the form of a vertical skirt which forms a structural unity with the tank wall. The vertical skirt has an intermediate portion in the region between the transition to the tank wall and the foundation, said intermediate skirt portion being made of a material which has the properties of poor heat conductivity relative to that of the material comprising the tank wall and the portions of the skirt above and below it, and which has, a thermal expansion coefficient which lies between those coefficients for the other skirt portions, and the ability to withstand low temperatures, said intermediate skirt portion being thermally insulated. That intermediate skirt portion forms a thermal barrier or "temperature brake" between the top and bottom portions of the skirt.

Abstract: A floating plant for offshore liquefaction, temporary storage and loading of LNG, made as a semi-submersible platform with storage tanks for LNG arranged in the submerged section of the platform. The storage tanks are independent spherical tanks which are supported inside the submerged section of the platform and completely surrounded thereby.

Abstract: A tank for holding liquefied gas and including a support in the form of a vertical skirt which forms a structural unity with the tank wall. The vertical skirt has an intermediate belt or zone in the region between the transition to the tank wall and the foundation, said zone being made of a bearing material which has the properties of poor heat conductivity relative to that of the material comprising the tank wall and the rest of the skirt, a thermal expansion coefficient which lies between the values for the other skirt materials, and the ability to withstand low temperatures, said zone being thermally insulated.

Abstract: When loading liquefied gas in a non-cooled skirt-supported tank the transitional area between the tank wall and the skirt is cooled down by direct cooling. Cooling arrangements for such cooling are disclosed.

Abstract: A spherical tank has at the equatorial plane a projection for cooperation with a supporting skirt, the projection and adjoining components forming a groove with a rounded bottom, the groove bottom area having a cross-section with neutral axes deflected toward each other.

Abstract: A ship having large, internally insulated, self-supporting spherical tanks for transport of liquefied gases is described. Different insulation materials are presented. Control systems for the insulation is provided. Also a method for applying the insulation is disclosed.