Stopper for a secondary diaphragm of an lng vat

F - Mech Eng,Light,Heat,Weapons – 17 – C

Patent

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Details

F17C 3/02 (2006.01)

Patent

CA 2752208

The invention relates to a liquefied natural gas tank, including a support structure (11) and a sealed and thermally insulated vat for containing liquefied natural gas, each wall of the vat having, in series in the direction of the thickness from the inside toward the outside of said vat, a primary sealed barrier, a primary thermally insulated barrier, a secondary sealed barrier and a secondary thermally insulated barrier, the secondary sealed barrier of a vertical wall including a first sealed layer located at the top of said wall and a connection device sealingly connecting said first sealed layer to said support structure, characterized in that said connection device includes a first metal plate (22) parallel to said first sealed layer, and a second sealed layer (17) which is adhered to said first sealed layer, as well as connected to said first metal plate.

Réservoir pour gaz naturel liquéfié, comprenant une structure porteuse (11) et une cuve étanche et thermiquement isolée destinée à contenir du gaz naturel liquéfié, chaque paroi de cuve présentant successivement, dans le sens de l'épaisseur depuis l'intérieur vers l'extérieur de ladite cuve, une barrière étanche primaire, une barrière thermiquement isolante primaire, une barrière étanche secondaire et une barrière thermiquement isolante secondaire, la barrière étanche secondaire d'une paroi verticale comprenant une première nappe étanche située au sommet de ladite paroi et un dispositif de liaison reliant, de manière étanche, ladite première nappe étanche à ladite structure porteuse, caractérisé par le fait que ledit dispositif de liaison comprend une première plaque métallique (22) parallèle à ladite première nappe étanche, et une deuxième nappe étanche (17) qui est, d'une part, collée à ladite première nappe étanche et d'autre part reliée à ladite première plaque métallique.

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