Abstract: The present invention relates to a watertight and thermally insulating tank built into a bearing structure comprising at least one wall having a variable width and forming oblique solid angles of intersection with the adjacent walls, the said tank comprising secondary insulating and watertightness barriers and a primary insulating barrier which are formed by panels fixed to the walls and able to hold a primary watertightness barrier, the said primary watertightness barrier comprises, at each variable-width wall, one or more central strake(s) (63) arranged longitudinally and each fixed to underlying panels (12), running strakes (66) being held mechanically, by a sliding joint, parallel to the oblique solid angles of intersection, on underlying panels and fixed at the ends to the central strakes, so that the tensile forces (F) experienced by the running strakes in their longitudinal dimension are transmitted to the bearing structure via the central strakes.

Abstract: A device is disclosed for preventing the evaporation of a liquefied gas stored in an impervious and thermally insulating tank built into a bearing structure of a ship or located in a set of floating or land-side storage tanks. The device passes a fluid refrigerant through the mass of liquefied gas to cool the mass to a temperature slightly below its reference storage temperature. By so doing, the refrigerant compensates for the heating of the mass, due to thermal leaks within the insulating tank, during the transport or storage of the liquefied gas.

Abstract: Watertight and thermally insulating tank intended for the transportation of liquefied gases by sea, said tank being built into a bearing structure (1) comprising longitudinally adjacent faces (2) forming a dihedron (4); said tank comprising two successive watertightness barriers, one of them a primary watertightness barrier in contact with the product contained in the tank and the other a secondary watertightness barrier (14,55,30,40) arranged between said primary watertightness barrier and the bearing structure, a primary thermally insulating barrier (12,13,24,27,28,29,37,38,51,54,71) being arranged between these two watertightness barriers and a secondary thermally insulating barrier (15,16,57,58,31,32,41) being arranged between said secondary watertightness barrier and the bearing structure; said primary watertightness barrier comprising substantially flat running metal strakes (62) and, on each side of the longitudinal solid angle of intersection (A) of at least one of said dihedra, a longitudinal row of

Abstract: Watertight and thermally insulating tank built into the bearing structure of a ship, said tank comprising two successive watertightness barriers, one being a primary one in contact with the product contained in the tank and the other being a secondary one placed between the primary barrier and the bearing structure, at least one thermally insulating barrier being provided between the bearing structure and the secondary watertightness barrier and/or between the two watertightness barriers, each thermally insulating barrier consisting of a number of caissons (102) of roughly parallelepipedal overall shape, each caisson having a bottom panel (105) and a top panel (106) made of plywood, characterized in that the panels of each caisson are spaced apart by a number of spacer pieces (103) which consist of thin sheets of plywood, extending at right angles to said panels, each caisson being at least partially filled with blocks of foam (104), bonded over a substantial part of the height of each spacer piece, to preven

Abstract: Watertight and thermally insulating tank intended for the transportation of liquefied gases by sea, said tank being built into a bearing structure (1) comprising longitudinally adjacent faces (2) forming a dihedron (4); said tank comprising two successive watertightness barriers, one of them a primary watertightness barrier in contact with the product contained in the tank and the other a secondary watertightness barrier (14,55,30,40) arranged between said primary watertightness barrier and the bearing structure, a primary thermally insulating barrier (12,13,24,27,28,29,37,38,51,54,71) being arranged between these two watertightness barriers and a secondary thermally insulating barrier (15,16,57,58,31,32,41) being arranged between said secondary watertightness barrier and the bearing structure; said primary watertightness barrier comprising substantially flat running metal strakes (62) and, on each side of the longitudinal solid angle of intersection (A) of at least one of said dihedra, a longitudinal row of

Abstract: Watertight and thermally insulating tank built into the bearing structure (1) of a ship, the said tank comprising two successive watertightness barriers, one of them a primary one (17) in contact with the product contained in the tank, and the other a secondary one (13) located between the primary watertightness barrier and the bearing structure, a thermally insulating secondary barrier (4) being located between the secondary watertightness barrier and the walls of the bearing structure, characterized in that it comprises an impact-resistant mechanical protecting shield (16) located between the two watertightness barriers, the shield being held elastically pressed against the secondary watertightness barrier by metal fastening means mechanically connected to the secondary insulating barrier, thermal insulation being afforded only by the secondary insulating barrier.

Abstract: Watertight and thermally insulating tank built into the bearing structure of a ship, the said tank comprising two successive watertightness barriers, the said bearing structure comprising walls (1) which form the internal sides of its double hull and two transverse bulkheads (2), these two watertightness barriers alternating with two thermally insulating barriers, the corner connection of the elements of the primary and secondary barriers, in the zones where the transverse bulkheads meet the internal sides, being achieved in the form of a connecting ring, the structure of which remains substantially constant right along the solid angle (3) of intersection between a transverse bulkhead and the internal sides, each connecting ring comprising a prefabricated composite girder (20) consisting of a rigid metal formwork (21) incorporated in a thermally insulating material (22), the said rigid formwork defining a central fixed anchorage zone (29) substantially at the intersection between the plane that bisects the co

Abstract: Impermeable and insulating tank built into a load-bearing structure, the tank having two successive sealing barriers alternated with two thermally insulating barriers, the secondary barriers and the primary insulating barrier consisting of a set of prefabricated panels, each panel comprising, in succession, a first rigid board, a first thermal insulation layer (104), a second thermal insulation layer (108), and a second rigid board, the junction regions between the primary insulating barrier elements of two adjacent panels being filled with insulating titles each consisting of a thermal insulation layer (115) covered with a rigid board, the continuity of the secondary sealing barrier being provided in the junction regions of two adjacent panels by flexible strips (120) which are impervious to gas and to liquid, each strip being hermetically bonded to a secondary insulating barrier element of a panel by a lateral marginal region (120a) and to a secondary insulating barrier element of the adjacent panel by an o