Liquefied natural gas storage tank

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

Patent

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Details

F17C 1/00 (2006.01) F17C 3/00 (2006.01) F17C 13/00 (2006.01)

Patent

CA 2557165

Substantially rectangular-shaped tanks are provided for storing liquefied gas, which tanks are especially adapted for use on land or in combination with bottom-supported offshore structure such as gravity-based structures (GBS). A tank according to this invention is capable of storing fluids at substantially atmospheric pressure and has a plate cover adapted to contain fluids and to transfer local loads caused by contact of said plate cover with said contained fluids to an internal frame structure comprised of a plate girder ring frame structure and/or an internal truss frame structure. Optionally, a grillage of stiffeners and stringers may be disposed on the plate cover and additional sifters disposed on the plate girder ring frame structure and/or an internal truss frame structure. Methods of constructing these tanks are also provided.

L'invention concerne des réservoirs de forme sensiblement rectangulaire destinés au stockage de gaz liquéfié, et qui sont spécialement adaptés pour être utilisés au sol ou en combinaison avec une structure au large des côtes posée sur le fond marin, p. ex. structures à gravité. La réservoir de l'invention permet de stocker des fluides pratiquement à la pression atmosphérique, et comporte une plaque couvercle conçue pour contenir des fluides et transférer les charges locales, produites par le contact de ladite plaque avec les fluides contenus, vers une structure interne constituée d'une structure annulaire de poutre à âme pleine et/ou d'une structure interne de support d'entretoises. Un treillis d'éléments renforts et de raidisseurs peut éventuellement être placé sur la plaque couvercle, ainsi que des tamis supplémentaires sur la structure de poutre à âme pleine et/ou la structure interne de support d'entretoises. L'invention concerne aussi des procédés de construction de ces réservoirs.

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