The invention concerns a sealed tank including adjacent first and second walls each comprising a corrugated sealing membrane; the sealing membranes of the first and second walls join at the level of an edge;

the sealing membrane of the first wall including a first series of corrugations and a second series of corrugations intersecting at the edge;
the sealing membrane of the second wall including a third series of corrugations intersecting at the edge;
the tank further including a corner arrangement comprising a sealing membrane that is welded in sealed manner to the sealing membrane of the first wall and to the sealing membrane of the second wall and is such that the corrugations of the first series of corrugations are connected to corrugations of the third series of corrugations and the corrugations of the second series of corrugations are connected to the corrugations of the third series of corrugations.

The invention concerns a sealed and thermally insulating vessel for storing a fluid, comprising a secondary thermal insulation barrier and a secondary sealing membrane, the secondary sealing membrane comprising a plurality of corrugated metal sheets sealingly welded to each other and each comprising at least two perpendicular corrugations, the secondary thermal insulation barrier comprising a plurality of juxtaposed insulating panels, each insulating panel having an inner face, opposite the bearing wall, provided with metal plates to which the corrugated metal sheets are welded, each insulating panel being associated with the adjacent insulating panels via a plurality of bridging elements.

A liquefied gas storage tank having insulation parts and a method for arranging the insulation parts are disclosed. Disclosed are the liquefied gas storage tank having the insulation parts and the method for arranging the insulation parts, the liquefied gas storage tank being capable of improving durability against the impact generated by liquefied gas since insulation panels, which are arranged in the insulating parts for the liquefied gas storage tank, have different densities according to: a load due to the mass of the liquefied gas stored in the liquefied gas storage tank; and the impact generated by sloshing.

A liquefied gas storage tank having insulation parts and a method for arranging the insulation parts are disclosed. Disclosed are the liquefied gas storage tank having the insulation parts and the method for arranging the insulation parts, the liquefied gas storage tank being capable of improving durability against the impact generated by liquefied gas since insulation panels, which are arranged in the insulating parts for the liquefied gas storage tank, have different densities according to: a load due to the mass of the liquefied gas stored in the liquefied gas storage tank; and the impact generated by sloshing.

A method for checking the sealing of a sealed tank for storing a liquefied gas at low temperature, the tank having an inner hull and a secondary sealing membrane, a secondary space that is arranged between the inner hull and the secondary sealing membrane, a primary sealing membrane and a primary space that is arranged between the primary sealing membrane and the secondary sealing membrane is disclosed. The method has the following main steps: generating a pressure lower than the pressure of the primary space in the secondary space using a suction device, measuring the temperature of an outer surface of the inner hull, and detecting the location of a sealing defect of the secondary sealing membrane in the form of a cold spot on the outer surface of the inner hull.

A corner structure comprises: a fixed member fixed to a corner of a storage tank; a movable member supported on the fixed member so as to be linearly movable; a stop member attached to the fixed member to prevent the movable member from being detached from the fixed member; and a heat insulating member disposed between a sealing wall and a hull. The fixed member comprises a guide portion provided with a guide recessed portion, the movable member comprises a guide protruding portion inserted into the guide recessed portion, and the width and the length of the guide protruding portion are smaller than the width and the length of the guide recessed portion, so that the movable member can be supported on the fixed member to be movable in the longitudinal direction and in the direction perpendicular to the longitudinal direction.

A new procedure for constructing cryogenic storage tanks involves erecting a freestanding metal liner. The liner is sized and configured to withstand the hydraulic forces the concrete wall of the tank being poured without the need for temporary stiffeners on the inside surface of lower portions of the liner. Lateral tension ties can be connected to anchor ties on an outward surface of the liner and used to tie the liner to outer formwork. These ties may be spaced up to about 2 m apart. Studs can also be provided on the outer surface of the liner, and a cylindrical ring of cryogenic steel can be integrated into the liner.

The invention relates to an installation for storing and transporting a liquefied gas, having a sealed pipe (7) that passes through the tank wall so as to define a fluid passage between the inside and the outside of the tank, a sealed metal sheath (29) that is disposed around the sealed pipe (7) and fitted in the opening (22) in the load-bearing wall, the sealed sheath having a longitudinal portion extending at least as far as the sealing membrane (14), the sealing membrane being joined to the sealed sheath (29) in a sealed manner, wherein the load-bearing structure comprises a coaming (24) that protrudes from an outer surface of the load-bearing wall, the sealed pipe being supported by a top wall (26) of the coaming, the sealed sheath (29) having an outer end that is disposed outside the load-bearing wall and attached to the coaming or to the sealed pipe (7) all around the sealed pipe.

Disclosed is a pump tower disposed inside a liquefied gas storage tank so as to supply or discharge liquefied gas to/from the inside of the liquefied gas storage tank. The pump tower, according to one embodiment of the present invention, comprises: a discharge pipe used for discharging the liquefied gas in the liquefied gas storage tank; an emergency pipe equipped with an emergency pump at the lower end thereof; a charge pipe for supplying the liquefied gas into the liquefied gas storage tank; and a support, which is provided on the bottom of the liquefied gas storage tank, for enabling the vertical displacement of the pump tower and restricting the horizontal movement and rotation thereof. The support comprises: a lower body fixed to a hull side; an upper body fixed to a pump tower side; and a wedge member interposed between the lower body and the upper body.

Disclosed is a heat-insulation system for a liquefied natural gas cargo hold, which comprises a primary sealing wall, a secondary sealing wall, and a secondary heat-insulating layer, and is applied to a liquefied natural gas cargo hold. The heat-insulation system for a liquefied natural gas cargo hold comprises a collar stud installed on a line on the upper surface of the secondary heat-insulating layer where an anchor strip is installed.