A set of fittings for a fuel tank including an elongated stem and a ferrule. The stem includes an elongated coupling body at one end configured to couple within a cavity defined by an end of a fuel tank liner. The ferrule includes a ferrule body having a first ferrule end and a second ferrule end; a lip defining a coupling orifice at the first ferrule end with the stem being operable to extend though the coupling orifice and engaging the lip, and a ferrule cavity defined by the ferrule body that extends between the first and second ferrule ends and opening to the coupling orifice at the first ferrule end and a ferrule opening at the second ferrule end, the ferrule cavity configured to surround the end of the fuel tank liner.

A pressure vessel (10) is provided with: a cylinder part (1) that defines a pressure chamber (11); a screwing part (3) that is disposed inside at least one of the two ends of the cylinder part; a lid (2) that has a pressure-receiving surface (2A) facing the pressure chamber and that is disposed at a position closer to the pressure chamber than is the screwing part; and a reinforcing ring (4) that is fitted to the outer circumferential surface of the cylinder part. The reinforcing ring covers, along the axial direction of the cylinder part, a part on an outer circumferential surface (1F) corresponding to a portion or the entirety of the engaging portion (12) between the cylinder part and the screwing part.

The present invention relates to a heat-insulating structural material, which: firstly, can minimize or prevent a thermal bridge by improving the structure of the connection part of the heat-insulating structural material; secondly, improves insulation performance by arranging a vacuum insulation material inside the core layer of the heat-insulating structural material; and thirdly, increases structural stiffness by forming the core layer from a non-foaming polymer material having excellent structural performance, prevents gas from moving in or out of the vacuum insulation material through the air-tight adhesive structure of the core layer, and can improve fire protection performance so as not to be vulnerable to fire, and thus the present invention is universally applicable to fields requiring insulation ability and structural performance.

A sealed and thermally insulating tank whose wall is fixed to a carrier wall. The tank wall includes a secondary thermal insulation barrier which is retained on the carrier wall and a secondary sealing barrier which is supported by the thermal insulation barrier. There is also a primary insulation barrier which is fixed to the secondary element of the tank by a fastener which is connected to the secondary insulation barrier.

A high-pressure vessel includes: a body portion formed in a cylindrical shape, with at least one end portion of the body portion, in an axial direction thereof, being open; a cap, at least part of which is inserted inside at least one open end portion of the body portion to plug the at least one open end portion; a first reinforcement layer provided on an outer peripheral surface of the body portion and made of fiber-reinforced plastic, a fiber direction of which coincides with a circumferential direction of the body portion; and a second reinforcement layer integrated with the first reinforcement layer and made of fiber-reinforced plastic including fibers that bridge one end portion and another end portion, in the axial direction, of the body portion.

A high-pressure vessel includes: a body portion formed in an open cylindrical shape; a cap, at least a part of the cap being inserted inside an opening of at least one end portion of the body portion to thereby plug the end portion; a first reinforcement layer provided at an outer peripheral surface of the body portion and configured by fiber-reinforced plastic having a fiber direction that coincides with a circumferential direction of the body portion; and a second reinforcement layer configured by fiber-reinforced plastic including fibers that pass through a center portion of the cap, as seen in the axial direction of the body portion, and that are disposed parallel to the axial direction of the body portion, as seen in a direction orthogonal to the axial direction of the body portion.

A precast, prestressed concrete tank and method that facilitates construction of a primary inner tank within a secondary outer tank, and which permits for the construction of the primary inner tank after the secondary outer tank has been erected, but without requiring insertion through a top of the secondary outer tank, or by tunneling underneath the secondary outer tank, is disclosed. The primary inner tank has an inner wall and the secondary outer tank has an outer wall (precast, prestressed concrete) and wire windings. The primary inner tank is disposed inside of the secondary outer tank. The secondary outer tank has a plurality of first precast outer wall panels, and a temporary construction opening frame. The temporary construction opening frame defines an access doorway during construction of the tank. The temporary construction opening frame is disposed on a foundation base slab.

A precast, prestressed concrete tank and method that facilitates construction of a primary inner tank within a secondary outer tank, and which permits for the construction of the primary inner tank after the secondary outer tank has been erected, but without requiring insertion through a top of the secondary outer tank, or by tunneling underneath the secondary outer tank, is disclosed. The primary inner tank has an inner wall and the secondary outer tank has an outer wall (precast, prestressed concrete) and wire windings. The primary inner tank is disposed inside of the secondary outer tank. The secondary outer tank has a plurality of first precast outer wall panels, and a temporary construction opening frame. The temporary construction opening frame defines an access doorway during construction of the tank. The temporary construction opening frame is disposed on a foundation base slab.

A thermal insulating structure includes: at least two retainers that protrude from a to-be-insulated surface exposed to a vacuum space; at least two first multilayer vacuum insulating sheets adjacent to each other with the retainers positioned therebetween, the insulating sheets covering the to-be-insulated surface; at least one second multilayer vacuum insulating sheet that extends between the retainers along a boundary between the first multilayer vacuum insulating sheets in a manner to cover the boundary; at least two third multilayer vacuum insulating sheets that are adjacent to each other with the retainers positioned therebetween, the at least two third multilayer vacuum insulating sheets covering the first multilayer vacuum insulating sheets and the second multilayer vacuum insulating sheet; and a keep plate that is fixed to the retainers and holds the first multilayer vacuum insulating sheets, the second multilayer vacuum insulating sheet, and the third multilayer vacuum insulating sheets.

A cryogenic liquid storage apparatus includes an inner container configured to store a cryogenic liquid, an inner holder disposed at the inner container, an outer container that surrounds the inner container, an outer holder disposed at the outer container, and a support wire that is a single body defining a closed-loop shape passing through the outer holder and the inner holder. The support wire is configured to support the inner container with respect to the outer container.