STOPPER FOR A SECONDARY DIAPHRAGM OF AN LNG VAT.

摘要

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.