Sealed and thermally insulating tank

摘要

The invention relates to a sealed and thermally sealed tank comprising a bottom wall (2) fixed to a supporting wall (1), the bottom wall (2) comprising: a sealing membrane (3) comprising a plurality of corrugated metal sheets welded, a thermally insulating barrier (4), the waterproofing membrane (3) and the thermally insulating barrier (4) being interrupted in a singular zone by a window (7) the tank comprising a hollow structure (15) inserted in the window (7), the hollow structure (15) being arranged through the thickness of the vessel wall (2), in which the vessel (71) has a metal closure plate (23), the metal closure plate ( 23) comprising an internal edge (24) welded all around the hollow structure (15), the metal closure plate (23) comprising an external edge (25) placed under the waterproofing membrane (3) so as to form a overlap area, in which the metal closure plate (23) is welded d e sealed with the waterproofing membrane (3) at the overlap area, and the metal closure plate (23) is left free from the thermally insulating barrier (4). Figure for the abstract: Fig. 1