A sealed and thermally insulating tank for storing fluid has a wall including a supporting structure, a primary thermal insulation barrier and a primary sealing membrane lying against the primary thermal insulation barrier, contacting the stored fluid. The primary thermal insulation barrier includes a primary insulating panel which includes a bearing zone collaborating with an anchoring device bearing against the bearing zone of the external rigid plate holding it toward the supporting structure. The primary thermal insulation barrier includes a reinforcing insulating plug extending, in the thickness direction, from the bearing zone of the external rigid plate to a specific zone of the primary sealing membrane to take up the compressive forces on the specific zone of the primary sealing membrane. The reinforcing insulating plug includes a polymer foam layer having a compressive yield strength greater than that of the polymer foam layer of the primary insulating panel.

The invention relates to a sealed and thermally insulating tank for storing fluid, comprising, from the outside to the inside of the tank, a secondary thermally insulating barrier and a secondary sealing membrane, the secondary sealing membrane being secured to the secondary thermally insulating barrier, a primary thermally insulating barrier resting against the secondary sealing membrane and a primary sealing membrane resting against the primary thermally insulating barrier, the tank comprising a duct that extends along a longitudinal direction, the duct being delimited on one hand by the secondary thermally insulating barrier and on the other hand by the secondary sealing membrane, a bottom of the duct being at least in part formed by the secondary thermally insulating barrier, the tank further comprising a pressure-drop stopper that is arranged in the duct and extends between the bottom of the duct and the sealing membrane.

A pressure accumulator includes a cylindrical body made of metal and configured to vaporize and store a liquefied gas in a storage space in the cylindrical body, a lid body having a through hole that allows a pipe to penetrate through the through hole, and being configured to close an opening end portion of the cylindrical body with a gap between the lid body and an inner peripheral surface of the cylindrical body, a sealing structure portion between an outer peripheral portion of the lid body and an inner peripheral portion of the cylindrical body, and a fixing part at the opening end portion of the cylindrical body, an outer peripheral surface of the fixing part being screw fastened to the inner peripheral surface of the cylindrical body to support and fix the lid body from an outer side of the lid body.