A retention assembly for a valve assembly of a charged cylinder may comprise a first fitting coupled to the valve assembly and a second fitting coupled to the charged cylinder. A retaining member may be coupled between the first fitting and the second fitting. The retaining member may be disposed within an interior chamber of the charged cylinder.

The present invention is a tank for storing pressurized gas. The tank comprises at least one tubular element (1) having a wall comprising a layer of prestressed concrete (6), at least one circumferential mechanical reinforcing layer (8), at least one axial mechanical reinforcing layer (7) and a sealing layer (5). The concrete from which the layer of prestressed concrete is made is chosen from ultra high performance fiber-reinforced concretes.

The present invention relates to a pressure container for storing gases or liquids under pressures above 200 bar, comprising an elongate storage element having at least one rotationally symmetrical, preferably conical and/or cylindrical, central portion, a plurality (N) or number (N) of individual layers (n=1 to N) which each have at least one braided or wound reinforcing fibre, preferably at least two braided or wound reinforcing fibres, wherein the individual layers (n=1 to N) lie over one another in a local sequence along a perpendicular (S) to the axis of rotation of the central portion, and wherein an inner starting layer (n=1) surrounds a hollow body arranged within the storage element or forms said hollow body, and wherein an end layer (n=N) arranged above the starting layer (n=1) is provided, and wherein the reinforcing fibre or the reinforcing fibres in each of the individual layers (n=1 to N) has or have a layer-dependent fibre angle .sub.n relative to the axis of rotation projected into the respective individual layer (n=1 to N), wherein, proceeding from the starting layer (n=1) to the end layer (n=N), the angle differences .sub.n of the fibre angles .sub.n of two successive individual layers (n=1 to N1) are defined by the equation .sub.n=.sub.n+1.sub.n, where n=1 to N1, and, for at least 80%, preferably at least 90%, of all angle differences .sub.1 to .sub.N1, the condition .sub.n0 is met.

A hydrogen refueling station based on low-temperature and high-pressure graded hydrogen storage includes: a liquid hydrogen storage tank, n?2 hydrogen storage vessels that are low-temperature and high-pressure vessels, a booster pump and a high-pressure vaporizer, disposed between the storage tank and the storage vessels. A temperature value and a maximum pressure value of gaseous hydrogen stored in the storage vessels are T.sub.n and P.sub.n; when n=2, T.sub.1<T.sub.2, P.sub.1<P.sub.2; and when n?3, T.sub.1< . . . T.sub.(n-1)<T.sub.n, P.sub.1< . . . P.sub.(n-1)<P.sub.n. A main refueling pipe is configured to communicate the hydrogen storage vessels with the hydrogen dispenser. A refueling controller is configured to, based on an ascending order of the temperature values, sequentially control corresponding hydrogen storage vessels to communicate with the hydrogen dispenser for participation in a refueling operation. A gaseous hydrogen refueling method based on the hydrogen refueling station is further provided.

This invention relates to methods of fabricating components of a pressure vessel using a dicyclopentadiene prepolymer formulation in which the purity of the dicyclopentadiene is at least 92% wherein the formulation further comprises a reactive ethylene monomer that renders the prepolymer formulation flowable at ambient temperatures and to pressure vessels that are fabricated by said methods.

The invention relates to a reinforcing liner comprising load-bearing yarns of a first type characterized in that the liner further comprises load-bearing yarns of a second type having a creep rate {acute over ()}.sub.2 of at least 10 times higher than the creep rate {acute over ()}.sub.1 of the yarns of first type, i.e. {acute over ()}.sub.210{acute over ()}.sub.1, wherein the creep rates are measured on the yarns at a temperature of 20 C. and under an applied load of 600 MPa. The invention also relates to a pressure vessel comprising thereof.

A retention assembly for a valve assembly of a charged cylinder may comprise a first fitting coupled to the valve assembly and a second fitting coupled to the charged cylinder. A retaining member may be coupled between the first fitting and the second fitting. The retaining member may be disposed within an interior chamber of the charged cylinder.

A pressure vessel (2) for the storage of fluid has a core (10) made of metal or polymer and is wrapped either completely or partially from outside with a high strength fibers (21, 22) for reinforcement wherein one of the reinforcing fibers is a metal wire (21) of a single filament or cables of multi filaments having strength from 2000 MPa to 6000 MPa. The wire has a plastic ductility of over 20% in reduction in area (RA) at tensile fracture. The metal wire (21) is made of steel or nickel or titanium or their respective alloys. The core (10) of the vessel (2) is first wrapped with a resin covered ceramic fibers such as carbon, fiberglass and subsequently wrapped with the metal wire (21) with or without other fibers (22). The metal wires (21) can be of different diameters in parallel or cabled forms.

A composite pressure vessel includes a liner to contain a pressurized fluid and a composite layer formed on at least a portion of an exterior surface of liner. The composite layer includes a third generation advanced high strength steel filament reinforcement embedded in a polymer matrix.

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.