A system for storing natural gas comprises a plurality of straight sections of tube. The plurality of straight sections of tube are dense packed. The plurality of straight sections of tube are configured to fill a designated volume.

A non-pyrophoric AB.sub.2-type Laves phase hydrogen storage alloy and hydrogen storage systems using the alloy. The alloy has an A-site to B-site elemental ratio of no more than about 0.5. The alloy has an alloy composition including about (in at %): Zr: 2.0-5.5, Ti: 27-31.3, V: 8.3-9.9, Cr: 20.6-30.5, Mn: 25.4-33.0, Fe: 1.0-5.9, Al: 0.1-0.4, and/or Ni: 0.0-4.0. The hydrogen storage system has one or more hydrogen storage alloy containment vessels with the alloy disposed therein.

Method for the production of a high-resistance tank has an initial stage in which a closed metal vessel is formed, followed by a second stage in which the walls of the vessel are subjected to a mechanical pre-tensioning treatment in both the axial and radial directions, up to a predetermined value. This mechanical treatment has a stage in which the tank is enclosed inside a mould of suitably larger dimensions. A liquid is then introduced in the tank and pressurized until the tank walls are dilated and stretched to a point where they encounter the mould inner surface. Subsequently, the outside of the tank is coated with one or more layers of composite material, so as to complete the construction of the tank, upon which a final auto-frettage treatment is carried out. The type of steel to be used is AISI 304, preferably in its more weldable AISI 304L version.

A method of producing a high-pressure steel cylinder by forming from an individual dimension piece, consisting of an upper neck on the rounded end, which protrudes from the cylinder and it is provided by an opening the cylinder is additionally provided on its bottom with another bottom neck made in an inner material strengthening which is orientated insidewards of the high-pressure steel cylinder and the inner material strengthening is provided by a through-out opening.

A dewar for storing a cryogenic fluid features an inner vessel configured to store the cryogenic fluid and an outer vessel having an outer upper head and an outer lower head. The outer upper and lower heads are joined so as to define an interior chamber of the dewar. The inner vessel is positioned within the interior chamber of the outer vessel so that an insulation space, which is evacuated of air, is defined between the inner and outer vessels. A neck extends between the inner vessel and a central region of the outer upper head. The outer upper head and neck are configured so that the central region permanently deforms without breaking the neck when excessive shock loads are applied to the dewar.

A pressure vessel includes a hollow body including a body, a first end, and a second end. The body includes a cylindrical body wall and each of the first and second ends includes a convex, rounded end wall. Each of the first and second ends forms a first and second juncture, respectively, where each end wall meets the body wall. The pressure vessel further includes first and second projections adjacent to the first and second juncture, respectively, and a fiber wrap surrounding the wall of the body between the first and second projections.

A pressure vessel for storing gaseous fuel has a vessel wall which surrounds an interior, wherein one or more ribs are formed on the vessel wall. A pressure vessel system, particularly for a motor vehicle, includes at least two such pressure vessels. A method is disclosed to form the ribs on the vessel wall of the pressure vessel.

Disclosed is a gas storage container for an inflator, the container being formed by cold forging a steel material having a predetermined steel composition. The steel composition by mass percent of the steel material includes, C: 0.10% to 0.31%, Si: 0.13% to 0.39%, Mn: 0.49% to 1.05%, P: 0.03% or less, S: 0.03% or less, Ni: 0.28% or less, Cr: 0.76% to 1.38%, Mo: 0.13% to 0.33%, and a remainder of Fe and unavoidable impurities.

A method for producing a light-weight pressure tank with a light-weight pressure container from a metal material, the light weight pressure container including at least one polar or equatorial attachment element and a container wall connected to the at least one polar or equatorial attachment element, wherein at least the container wall is formed integrally in one piece with the at least one polar or equatorial attachment element by additive manufacturing by a thermal spraying method by applying the metal material to a convex or concave mold surface of a cambered formwork mold by a spray jet through at least one spray nozzle.

A tank, in particular for a liquid hydrogen reservoir, provided with at least one dome fixed by way of an outer welded joint and having a central portion provided with at least one free end including a first connecting element and at least one dome provided with an open end including a second connecting element, the dome and the central portion being able to be joined together, the first connecting element and the second connecting element being configured to form, when the central portion and the dome are joined together, a protruding tab extending toward the outside of the tank and able to be welded to a protruding end, such a protruding tab making it possible in particular to join together the tank, this being done entirely from the outside of said tank, and to easily mount and dismount the dome, in particular without accessibility issues.