A reinforcement layer of a high-pressure vessel has a plurality of low helical layers. In at least one of the (i−1)-th low helical layer and the i-th low helical layer, the difference between the diameter of an opening formed in an end portion of the (i−1)-th low helical layer and the diameter of an opening formed in an end portion of the i-th low helical layer is equal to or larger than the width of the band-shaped fiber when an inclination angle WA of the band-shaped fiber is equal to or smaller than a second angle smaller than a first angle.

Multilayer structure for transporting hydrogen, including, from the inside, at least one sealing layer and at least one composite reinforcing layer, an innermost composite reinforcing layer being wound around an outermost adjacent sealing layer, the sealing layers of a composition predominantly of at least one semi-crystalline, long-chain polyamide thermoplastic polymer P1i (i=1 to n, n being the number of sealing layers), the Tf of which, as measured according to ISO 11357-3: 2013, is greater than 160° C., with the exception of one polyether block amide (PEBA), up to 50% by weight of impact modifier relative to the total weight of the composition and up to 1.5% by weight of plasticiser relative to the total weight of the composition, the composition being free of nucleating agent, and at least one of the composite reinforcing layers being of a fibrous material.

A pressure vessel includes: a liner made of a resin and configured to store a pressurized fluid; and a reinforcing layer made of a fiber-reinforced resin provided around an outer peripheral surface of the liner. The liner includes a body portion having a tubular shape and a pair of side-end portions each having a domical shape. One of the side-end portions extends continuously from one of two ends of the body portion, and the other one of the side-end portions extends continuously from the other one of the two ends of the body portion. The liner includes a restriction portion provided at a center of the liner in an axial direction of the body portion. The restriction portion is configured to restrict displacement of the reinforcing layer in the axial direction.

Provided is a pressure-resistant container that allows a time required for winding a fiber-reinforced member on both a tubular barrel portion and dome portions of a container body to be shortened. A pressure-resistant container includes: a container body having a tubular barrel portion, and dome portions that are provided integrally on both end portions, respectively, in an axial direction, of the tubular barrel portion; and a fiber-reinforced member that covers an outer surface of the container body. The fiber-reinforced member includes a first fiber sheet that is formed from fibers oriented in one direction, and that has a fiber direction in which the fibers extend such that the fiber direction is tilted relative to the axial direction of the container body at such an angle as to cover both the dome portions, on both sides in the axial direction, of the container body. The first fiber sheet has a sheet body portion formed in a sheet-like shape, and a plurality of protruding portions that are aligned on and protrude from both end portions, in a fiber direction, of the sheet body portion. The sheet body portion is wound along an outer surface of the tubular barrel portion to cover the tubular barrel portion. The protruding portions are wound back along outer surfaces of the dome portions to cover the dome portions.

A pressure vessel includes: a liner made of a resin and configured to store a pressurized fluid; and a reinforcing layer made of a fiber-reinforced resin provided around an outer peripheral surface of the liner. The liner includes a body portion having a tubular shape and a pair of side-end portions each having a domical shape. One of the side-end portions extends continuously from one of two ends of the body portion, and the other one of the side-end portions extends continuously from the other one of the two ends of the body portion. The liner includes a restriction portion provided at a center of the liner in an axial direction of the body portion. The restriction portion is configured to restrict displacement of the reinforcing layer in the axial direction.

The present invention is directed to a reinforcement method for a cylindrical high-pressure tank reinforced by FRP prepreg bandage, totally. For that purpose, this invention developed the manufacturing process for the internal metallic tank assembly where its diameter is comparatively large. It is effective for lightening weight of a high-pressure tank.

A high-pressure tank that enables end portions of a first reinforcing layer wound around a body of a liner to sufficiently contribute to the strength of dome portions of the tank. In the high-pressure tank, a reinforcing layer includes the first reinforcing layer that covers the body and a second reinforcing layer that covers the first reinforcing layer and side end portions of the liner. The first reinforcing layer includes a hoop reinforcing layer formed through hoop winding of a resin-containing fiber bundle in a midsection of the body, and a helical reinforcing layer arranged in parallel with the hoop reinforcing layer along the axis direction of the high-pressure tank and formed through helical winding of the fiber bundle in a section on at least one end side of the midsection, the helical reinforcing layer forming a part of the dome portions.

The present disclosure provides a pressure vessel 10 (sometimes known as a composite overwrapped pressure vessel or “COPV”) comprising carbon fiber 20 (such as carbon fiber 20 filaments) wrapped around a tank liner 30.

The present invention is a pressure tank comprising a tubular part and two bottoms (5) with the bottoms (5) positioned at the ends of the tubular part. The tubular part comprises a cylindrical wall (1) and a ply of circumferential reinforcing elements (2) wound around cylindrical wall (1). The elastic modulus of the material of cylindrical wall (1) is less than the elastic modulus of the material of the first ply of circumferential reinforcing elements (2). The invention also relates to an energy storage and recovery system comprising a compressor, an expansion device, a heat storage and a compressed air tank according to the aforementioned characteristics.

A system for powering a vehicle is provided. The system can include an engine or power generation system to be powered by a fuel and a housing. The housing can be configured to couple to one or more frame rails of the vehicle, receive and protect a cylinder configured to store the fuel to be used by the engine or power generation system. The housing can have one or more access panels allowing access to an interior of the housing. The cylinder can include a first end portion, a second end portion, a central body forming an enclosed cavity for storing pressurized gas, a reinforcement structure disposed over the central body, and a metal foil interposed between the reinforcement structure and central body. The metal foil can be configured to reduce permeation of contents of the cylinder.