An opening-side flange may include a connecting surface including an inclined surface, a corner part, and an annular groove on a bottom-face side. A conical surface part of the inclined surface may be a conical surface of a truncated cone, and may be inclined such that a radially outer end thereof approaches an opening side. The corner part may be a corner formed between the inclined surface and the annular groove, and may function as a sealing surface with the liner. The annular groove may be a part that connects the inclined surface to an outer surface part, and may be a part that is hollowed toward the opening side relative to the inclined surface.

A sealed and thermally insulating tank intended for the storage of a fluid, the tank having a secondary insulating barrier having juxtaposed insulating panels; and a primary insulating barrier having insulating panels that are each arranged straddling at least four secondary insulating panels and anchored to the latter. The sealed tank is equipped with a through-element passing through a specific zone of the wall. In the specific zone of the wall, the longitudinal directions of the primary panels are perpendicular to the longitudinal directions of the secondary insulating panels. The through-element passes successively through an opening made in one of the secondary insulating panels and an opening made in one of the primary insulating panels.

A gas storage apparatus includes a foam body having a negative Poisson's ratio, and a gas impregnated in closed cells of the foam body, the gas having a pressure above atmospheric pressure. A method of making a gas storage apparatus includes providing a first body comprising a precursor material, and, while the first body is in an atmosphere including a gas, applying a stimulus to the precursor material, the stimulus causing the precursor material to form a closed-cell porous foam structure having a negative Poisson's ratio. Cells of the closed-cell porous foam structure encapsulate the gas at a pressure above atmospheric pressure.

A sealing system for an outlet of a polymer-lined compressed gas cylinder has a polymer liner outlet extending into a bore of a boss. An insert is engaged with the bore and a secondary angled seal, forming two primary seals between the insert and portion of the liner outlet. The first seal is an O-ring in the radial direction. The second seal is an angled seal, or beveled conical seal, of the polymer being compressed between the metal components of polar boss and the insert. The use of seal in two different directions compresses the polymer liner in two directions to prevent any possibility of gas leakage and/or seal extrusion under pressure. The angled seal surface prevents any reverse extrusion of the primary seal that might happen during cold temperatures or during repeated pressure cycles in long term service.

The present invention relates to a method for manufacturing an internal shell of a composite type IV reservoir delimiting an internal cavity intended to accommodate a pressurized fluid and comprising at least one metal baseplate allowing connection between said internal cavity and the outside of the internal shell, said baseplate or baseplates being secured to the internal shell, said method comprising the following steps: a) a step of applying at least one adhesive layer of a first polymer to the part or parts of the metal baseplate or baseplates intended to be in direct contact with the material of which the internal shell is made; b) a step of incorporating said baseplate or baseplates thus coated into a mould the internal cavity of which is of a shape that corresponds to the shape of the internal shell that is to be obtained; c) a step of forming, on the internal wall of the mould and on the part or parts of the baseplate or baseplates intended to be in contact with the material of which the internal shell is made, at least one layer of a second polymer different from said first polymer and adhering to the first polymer, thus forming the aforementioned internal shell equipped with the aforementioned baseplate or baseplates.

A sealed and thermally insulating tank intended for the storage of a fluid, the tank having a secondary insulating barrier having juxtaposed insulating panels; and a primary insulating barrier having insulating panels that are each arranged straddling at least four secondary insulating panels and anchored to the latter. The sealed tank is equipped with a through-element passing through a specific zone of the wall. In the specific zone of the wall, the longitudinal directions of the primary panels are perpendicular to the longitudinal directions of the secondary insulating panels. The through-element passes successively through an opening made in one of the secondary insulating panels and an opening made in one of the primary insulating panels.

Sealed and thermally insulating tank in which a first tank wall and an adjacent second tank wall form an edge, the tank further including a sealed corner piece fixed in a sealed manner to the sealing membrane of the first tank wall and of the second tank wall, the corner piece including a sheet metal corner angle-iron situated in line with the edge, a first reinforcing flange, a second reinforcing flange, a first locking piece, a second locking piece wherein the locking pieces are fixed to the insulating barrier, the first reinforcing flange and the second reinforcing flange each include a tab fixed to the lower face of the first and second locking pieces, respectively.

A tank comprising a multi-layer structure, for storing compressed gas, including in succession from inside to outside at least the three following layers: at least one sealing layer of a composition including at least one semi-crystalline thermoplastic polyamide having a Tm of less than or equal to 280 C., at least one intermediate composite reinforcing layer of a fibrous material in the form of continuous fibres impregnated with a composition including at least one semi-crystalline thermoplastic polyamide having a Tg of less than 100 C., at least one outer composite reinforcing layer of a fibrous material in the form of continuous fibres impregnated with a composition including at least one polyphthalamide having a Tg of greater than 80 C., the outermost sealing layer being welded to the innermost intermediate composite reinforcing layer and the outermost intermediate composite reinforcing layer being welded to the innermost outer composite reinforcing layer.

A cryogenic tank includes a membrane anchor mechanism which fixes a membrane provided on an inner wall surface side of a concrete wall via a heat insulating material to the concrete wall, a pressing par which is provided by the membrane anchor mechanism and presses the membrane from the inside of the cryogenic tank, and an interposition part which is interposed between the pressing part of the membrane anchor mechanism and the membrane, and includes a first abutment surface coming into surface-contact with the pressing part and a second abutment surface coming into surface-contact with the membrane.

A method for constructing a triple shell tank including an inner tank, an intermediate tank, and an outer tank each having a roof and a side plate includes the following procedure. As construction entrances, a first construction opening is opened in an outer tank side plate, a second construction opening is opened in an inner tank side plate, and a third construction opening is opened in an intermediate tank side plate, each during the installation of the corresponding side plate. The construction openings are opened so as to partially overlap with one another in a circumferential direction and a height direction of the triple shell tank. The first construction opening and the second construction opening are opened so as to satisfy a relationship AR1AR2, where AR1 is an opening area of the first construction opening and AR2 is an opening area of the second construction opening.