It is possible to achieve reduction in the occurrence of tension decrease at fiber bundles in a sheet. A method of manufacturing a tank includes several steps. A feed step is carried out of feeding a sheet including aligned fiber bundles while applying tension to the sheet in the longitudinal directions of the fiber bundles. The method further includes a detection step of detecting a decreased tension part subjected to tension decrease in the sheet being fed and a tension recovery step of compensating for the tension decrease at the decreased tension part by spraying an organic solvent if the decreased tension part is detected in the detection step. The method also includes a winding step of winding the sheet having been fed on a liner.

It is possible to achieve reduction in the occurrence of tension decrease at fiber bundles in a sheet. A method of manufacturing a tank includes several steps. A feed step is carried out of feeding a sheet including aligned fiber bundles while applying tension to the sheet in the longitudinal directions of the fiber bundles. The method further includes a detection step of detecting a decreased tension part subjected to tension decrease in the sheet being fed and a tension recovery step of compensating for the tension decrease at the decreased tension part by spraying an organic solvent if the decreased tension part is detected in the detection step. The method also includes a winding step of winding the sheet having been fed on a liner.

Systems and methods for filling and pressurizing a container with liquid suppressant and nitrogen gas. A pressurized receiving container of nitrogen gas is initially provided at a transformative pressure and liquid suppressant is subsequently added to the pressurized receiving container. The transformative gas pressure provides a sufficient amount of nitrogen to saturate the added liquid suppressant and provide an operative head space pressure within the receiving container without the need for mechanized mixing of the nitrogen and liquid suppressant solution.

An end-cap arrangement for a polymer pressure vessel comprises an end-cap, a filler element for being provided in the vicinity of the end part of the polymer pressure vessel, and a polymer outer ring. The end-cap comprises a polymer end-cap part and a polymer inner ring part being integrally connected to the polymer end cap part. The end-cap is provided for inserting into an end part of the polymer pressure vessel such that the polymer end-cap part seals the end part of the polymer pressure vessel. The polymer inner ring part and the polymer outer ring are arranged for providing radial compression of the filler element.

A pressure vessel includes a vessel body, a first rib and a second rib. The vessel body includes a first surface and a second surface. The first rib projects in a second direction from the first surface and extends in a first direction. The second rib provided in series with the first rib, projects in the first direction from the second surface, and extends in the second direction. A width in the second direction of the internal space is smaller than a width in the first direction of the internal space. A maximum value of a projection amount of the second rib from the second surface to the outside of the vessel body in the first direction is smaller than the maximum value of a projection amount of the first rib from the first surface to the outside of the vessel body in the second direction.

A pressure vessel includes a vessel body, a first rib and a second rib. The vessel body includes a first surface and a second surface. The first rib projects in a second direction from the first surface and extends in a first direction. The second rib provided in series with the first rib, projects in the first direction from the second surface, and extends in the second direction. A width in the second direction of the internal space is smaller than a width in the first direction of the internal space. A maximum value of a projection amount of the second rib from the second surface to the outside of the vessel body in the first direction is smaller than the maximum value of a projection amount of the first rib from the first surface to the outside of the vessel body in the second direction.

Provided are a pressure vessel and a vehicle. The pressure vessel includes a casing, a cylinder valve, a valve seat and an inner liner, the casing has a storage space, the casing has a communication channel communicating the storage space with an outside, the cylinder valve is disposed at the communication channel and configured to adjust an opening degree of the communication channel, the valve seat is at least partially supported between the cylinder valve, the inner liner is disposed on an inner wall surface of the casing, the cylinder valve extends out of the inner liner, the inner liner includes a fitting portion adapted to surround and be attached on an outer peripheral surface of the cylinder valve, and a limiting portion is provided on an inner wall surface of the valve seat and adapted to be attached on and stop the outer peripheral surface of the cylinder valve.

Provided is a highly practical pressure vessel in which there is minimal inside diameter deformation even if openings in a center inlet/outlet part are large, and there is little pressure-induced elongation from a center to both ends. This pressure vessel is composed of a tube body made of a fiber-reinforced resin, wherein: a center inlet/outlet part that lets a liquid in or out is provided to a tube-body-axial center part on a peripheral surface of the tube body; end-part inlet/outlet parts that let a fluid in or out are provided to tube-body-axial end parts of the tube body; the tube body is configured from a helical layer of which fibers are inclined at an angle of from 40 to less than 50 relative to a tube-body-axial direction, a reinforcing layer of which fibers are inclined at a greater angle than the helical layer relative to the tube-body-axial direction, and a seal layer constituting an innermost layer; a breakaway part that breaks away circumferentially outward from the seal layer is provided to a position on the helical layer where the center inlet/outlet part is provided; the reinforcing layer is configured from an inward reinforcing layer and an outward reinforcing layer provided respectively to inward and outward sides of the helical layer so as to enclose the breakaway part of the helical layer therebetween; and the center inlet/outlet part is provided so as to penetrate the inward reinforcing layer, the breakaway part of the helical layer, and the outward reinforcing layer.

A method for manufacturing a gas filling container is provided. The method includes performing a treatment of bringing an amine compound into contact with the inner surface of a gas filling container having at least the inner surface made of stainless steel, manganese steel, carbon steel, or chromium molybdenum steel, and, after the treatment, a treatment of volatilizing off the amine compound from the gas filling container.

A method for manufacturing a gas filling container is provided. The method includes performing a treatment of bringing an amine compound into contact with the inner surface of a gas filling container having at least the inner surface made of stainless steel, manganese steel, carbon steel, or chromium molybdenum steel, and, after the treatment, a treatment of volatilizing off the amine compound from the gas filling container.