A double-wall tank comprising at least one piping connecting system and to a method for assembling a double-wall tank provided with at least one piping connecting system. An inner connecting part is coupled to an comprises an inner part hole. The inner part hole and an inner wall hole of the inner wall are coincident. An outer connecting part is coupled to an outer wall and comprises an outer part hole. The outer part hole and an outer wall hole of the outer wall are coincident. One or more pipes pass through the outer part hole, the outer wall hole, the inner part hole, the inner wall hole. The pipe is coupled, in a fluid-tight fit, to the inner part hole and the outer part hole.

A type IV conformable pressure vessel is provided comprising an elongated folded tank and a valve assembly configured to pass fluid into and out of an interior of the tank through first and second filling couplers directly connected to a respective first and second end of the tank. The tank has at least two chambers for the storage of fluid. The valve assembly receives fluid from an external source, selectively provides the external fluid through a Venturi nozzle into a mixing chamber, recirculates fluid from the second end of the tank into the mixing chamber, and delivers the mixture of the recirculated fluid and the external fluid to the first end of the tank.

A pressurized gas containment liner includes a first part comprising a first shell with a first peripheral edge, and a second part comprising a second shell with a second peripheral edge. The first peripheral edge is rigidly connected to the second peripheral edge, and the first shell and the second shell delimit between them an interior volume. The first part comprises at least one pillar that passes through the interior volume, is formed integrally with the first shell, and is elongated between a proximal end, connected to the first shell, and a distal end, rigidly connected to the second part. A transverse section of the pillar decreases from the proximal end to the distal end.

A pressurized gas containment liner includes a first part comprising a first shell with a first peripheral edge, and a second part comprising a second shell with a second peripheral edge. A strip is superimposed on the first peripheral edge and on the second peripheral edge. The strip rigidly connects the first part and the second part to each other, and the first part, the second part, and the strip delimit an interior volume between them. The pressurized gas containment liner further includes at least one pillar passing through the interior volume and connecting the first and the second shells.

A pressurized gas containment liner includes a first part comprising a first shell, a second part comprising a second shell, and at least one intermediate part, arranged between the first part and the second part, in an assembly direction. The intermediate part is rigidly connected to the first and second parts. The first part, the second part, and the at least one intermediate part together delimit an interior volume. The or at least one of the intermediate parts comprises an intermediate shell and at least one pillar elongated in an elongation direction and connecting two opposite portions of the intermediate shell, and passing through the interior volume perpendicular to the assembly direction. The pillar and the intermediate shell are integral.

The disclosure relates to a tank for storing volatile gas under pressure and a structure comprising the tank. The tank has a wall formed of a filament wound carbon fibre reinforced polymer (CFRP). The CFRP may have a graphene nanomaterial filler dispersed in the polymer adhesive matrix. The structure includes a frame for bearing static and dynamic forces from internal and external loads, the frame including the tank, the tank being an active load bearing structural element configured as a stressed member in the frame such that, in the structure in use, the tank bears static and dynamic forces from internal and external loads. One or more of: the filament winding pattern of the carbon fibre, the wall thickness, the wall shape, or the material properties of the polymer matrix including the dispersed graphene; is configured such that the tank has mechanical properties required by the design of the structure.

An aircraft, including a hydrogen consumer and a hydrogen supply device for supplying the hydrogen consumer with hydrogen, the hydrogen supply device having a cryogenic hydrogen tank for storing liquid hydrogen. In order to lower the weight while improving performance of the hydrogen tank during different flight conditions, embodiments of the aircraft further include a suspension arrangement with suspension elements for suspending the hydrogen tank on a structure of the aircraft, wherein the hydrogen tank includes a tank wall made from fiber reinforced composite material, and wherein the suspension arrangement includes a plurality of first tensile loaded dry fiber suspension elements fixed to load introduction areas on the hydrogen tank such that the suspension elements extend essentially tangential to a surface of the hydrogen tank at the associated load introduction area.

An assembly or apparatus for use in relation to an assembly, wherein said assembly is subjected to a temperature of less than 50 C. in use, wherein said assembly or apparatus includes a component which comprises a polymeric material (A) having a repeat unit of formula O-Ph-O-Ph-CO-Ph- (I) wherein Ph represents a phenylene moiety; and wherein said polymeric material (A) has a melt viscosity of at least 0.50 kNsm.sup.2.

The present invention proposes a fuel tank comprising at least two shells weldable together, each of said at least two shells is made of a polymer composition comprising at least 45% by weight of at least one aromatic polyamide and at least 10% by weight of at least one aliphatic polyamide relative to the total weight of the polymer composition.

A high-pressure container having a liner and a composite layer for reinforcing a perimeter of the liner includes: a cylinder part foiled along the axial direction of the high-pressure container; and dome parts fastened to both ends of the cylinder part to enclose the high-pressure container. The composite layer formed on the cylinder part is formed by a plurality of hoop layers and helical layers overlapped alternately. A hoop layer disposed closer to the liner has a thickness greater than that of a hoop layer disposed farther from the liner so that a thickness of the hoop layers decreases as a distance from the linear increases.