Gas containment vessels are provided that are comprised of an inner corrosion resistant shell made of lower strength steel alloy or aluminum alloy or thermoplastic polymer, and an outer concentric shell constructed of high strength, albeit lower corrosion resistant, metal or fiber-reinforced composite. The fiber can comprise filaments derived from basaltic rocks, the filaments having been immersed in a thermosetting or thermoplastic polymer matrix, and commingled with carbon, glass or aramid fibers such that there is load sharing between the basaltic fibers and carbon, glass or aramid fibers.

The invention relates to a device basically consisting of the packaging of matrices of parallel tubes that act as pressurised containers. Both ends of each tube are hermetically connected to collectors located in the vicinity of the ends of the tubes. The collectors have multiple accommodations distributed according to the packing pattern of the tube matrix, there being an accommodation for each tube end. At least one collector has an internal channel that allows the connection of fluids between the tubes forming the tube matrix. This collector has an opening that allows fluid exchange between the inside of the tubes and the outside. The assembly comprising the tube matrix and collectors is surrounded by a structural belt. The collectors have a rounded geometry in the area of contact with the belt. Reinforcement fibres of the belt are mainly arranged parallel to the axis of the tubes. Reinforcement fibres of the tubes are mainly arranged in the circumferential direction of same. Those areas of the assembly comprising the tube matrix and collectors not covered by the belt are covered by casings. A rigid foam occupies the spaces between the outside of the tubes and the rest of the space inside the belts and the casings.

A high-pressure tank comprising: a resin liner for a high-pressure tank including at least one opening portion; an aluminum mouth portion attached to the opening portion; and a reinforcement layer formed on an outer surface of the liner, wherein an aluminum oxide coating is formed on a surface of the aluminum mouth portion, the aluminum oxide coating includes a porous surface layer in which columns with an average height of 10 to 100 nm are arranged in a dispersed state, an average value of a percentages of the protruding portion area of the columns in randomly sampled 400 nm square visual fields of the porous surface layer is 5.0 to 26.0%, and an average value of the numbers of the columns in randomly sampled 400 nm square visual fields of the porous surface layer is 500 to 2000.

A storage container includes a wall structure defining an interior, where the interior is configured to contain a fluid. A portion of the wall structure is formed by a composite material. The composite material includes frozen water and a fibrous additive.

A polyamide resin composition for a molded article exposed to high-pressure hydrogen contains a polyamide 6 resin (A) and a polyamide resin (B) having a melting point, as determined by DSC, that is not higher than a melting point of the polyamide 6 resin (A) +20 C. and a cooling crystallization temperature, as determined by DSC, that is higher than a cooling crystallization temperature of the polyamide 6 resin (A), the polyamide resin (B) present in an amount of 0.01 to 5 parts by weight based on 100 parts by weight of the polyamide 6 resin (A). The polyamide resin composition can provide a molded article having excellent weld properties and is less likely to suffer failure points despite repeated charging and discharging of high-pressure hydrogen.

Disclosed is a breathing apparatus comprising a pressure vessel. The pressure vessel may comprise a composite shell formed from a plurality of fibres and a matrix comprising a resin material and graphene particles. The pressure vessel may comprise at least one permeation barrier layer comprising graphene microparticles or graphene nanoparticles provided on an outer surface of the structural shell or on an outer surface of the liner. Methods of manufacture for pressure vessels are also disclosed.

An aeronautical cryogenic tank device for storing gas, having a spherical or annular shape about an axis, comprising an inner container (26) defining a liquefied gas storage chamber (28), an outer envelope (27) containing the inner container (26), an insulation chamber (29) defined between the inner container (26) and the outer envelope (27), the reduced-pressure insulation chamber (29) having scaling equal to or better than 10-9 millibar*litre/second, a removable collector (38) passing through the outer envelope (27) and the inner container (26) in a sealed manner, the collector (38) extending over a diameter or a diagonal of the inner container (26) and having a free end close to a bottom of the inner container (26), and a conduit supplied by the collector (38).

An acronautical gas storage cryogenic tank device, comprising an inner container (26) defining a liquefied gas storage chamber (28), an outer envelope (27) containing the inner container (26) and made of a plurality of demountable parts for accessing the inner container (26), the outer envelope (27) being made of a material resistant to temperatures from less than 60 C. to at least +80 C. an insulation chamber (29) defined between the inner container (26) and the outer envelope (27), the reduced-pressure insulation chamber (29) having helium-tightness equal to or better than 10*9) millibar*litre/second defined between the inner container (26) and the outer envelope (27), two connections of which at least one is a sliding connection, supporting the inner container (26) and borne by the outer envelope (27), a removable collector (42) passing through the outer envelope (27) and the inner container (26) in a sealed manner, and a flexible thermally insulating neck (42) forming a sealed interface between the collector on the one hand and, on the other hand, the outer envelope (27) and the inner container (26), the neck (42) being formed around a portion of the collector (38), the neck (42) passing through the insulation chamber (29) in order to allow the collector (38) to be demounted independently of the pressure in the insulation chamber (29).

A cryogenic storage system basically includes a first cryogenic storage tank, a second cryogenic storage tank, a fluid transfer line and a cryogenic containment structure. The first cryogenic storage tank has a first predetermined capacity of liquefied gas. The second cryogenic storage tank has a penetration free bottom and a second predetermined capacity of the liquefied gas that is larger than the first predetermined capacity of the first cryogenic storage tank. The fluid transfer line is fluidly connected between the first cryogenic storage tank and the second cryogenic storage tank. The heat exchanger converts liquid exiting the first cryogenic storage tank to a higher pressure gas that is used as a motive force to move liquidized gas out of the second cryogenic storage.

A multilayer structure selected from a reservoir, a pipe or a tube, for transporting, distributing or storing hydrogen, including, from the inside to the outside, at least one sealing layer and at least one composite reinforcing layer, the innermost composite reinforcing layer being welded to the outermost adjacent sealing layer, the sealing layers including at least one semi-crystalline thermoplastic polymer, the Tm of which is less than 280 C., wherein the at least one thermoplastic polymer of each sealing layer may be the same or different, and at least one of the composite reinforcing layers being of a fibrous material in the form of continuous fibers impregnated with a composition of at least one thermoplastic polymer P2j, the thermoplastic polymer P2j having a Tg greater than the maximum temperature of use of said structure (Tu), with TgTu+20 C., Tu being greater than 50 C.