A pressure vessel includes a vessel main body, a first protective member, and a second protective member. The vessel main body is configured to contain gas inside. The second protective member is configured to exhibit performance that is different from that of the first protective member. One of the first protective member and the second protective member has recesses that the other one of the first protective member and the second protective member does not have at an end on a peak of a domical panel side provided with the one of the first protective member and the second protective member.

A high-pressure gas tank includes: a tank body section; a base attached to an opening of the tank body section; a valve attached to an opening of the base so as to open and close a gas supply-discharge port of the tank body section, a part of the valve being inserted in the base, and the valve having a contact surface that contacts a seat surface as a surface of an end of the base, the surface of the end of the base forming the opening of the base; and a seal member arranged between an outer peripheral surface of a portion of the valve that is inserted in the opening of the base and an inner peripheral surface of the base. A slit for forming a communication hole communicating between outside of the high-pressure gas tank and a space between the base and valve is provided.

Methods and manufactures disclosed herein generally relate to a cannular composite (ITC) structure composed of multiple layers of scaling, reinforcement, sensing, protection, and interspatial injected materials.

Methods and manufactures disclosed herein generally relate to a cannular composite (ITC) structure composed of multiple layers of sealing, reinforcement, sensing, protection, and interspatial injected materials.

It is an object of the present invention to provide a pressure container configured so that a seal member is excellent at maintainability and has a simple structure. The container includes a hollow plastic liner (2) provided with a projected cylindrical neck portion (2b), and to reserve gas or liquid; a mouthpiece member (3) disposed outside the neck portion (2b) in a radial direction; a reinforced layer (4) covering outsides of the plastic liner (2) and the mouthpiece member (3); an attachment member (5) capable of being inserted between the neck portion (2b) and the mouthpiece member (3), and attachable to and detachable from the mouthpiece member (3); and a first seal member (6) disposed between an outer peripheral surface of the neck portion (2b) and an inner peripheral surface of the attachment member (5).

A high-pressure gas tank includes a seal member that covers an opening recess from a surface of a liner on an outer side of an inner circumferential wall of a mouthpiece placing portion to a surface of a mouthpiece flange on a center side of a flange outer peripheral edge. The flange outer peripheral edge and the inner circumferential wall of the mouthpiece placing portion satisfy Dt>(Sm/Xgs).Math.100. Dt denotes a width of an opening of the opening recess and is defined as a distance between a flange outer peripheral edge-side end and an inner circumferential wall-side end of an opening of the opening recess. Sm denotes a maximum tolerance of a relative positional misalignment between the inner circumferential wall of the mouthpiece placing portion and an outer circumferential end of the flange outer peripheral edge. Xgs [%] denotes a breaking elongation of the seal member.

Disclosed is a device, a system and methods for tracking conductive composite pressurized gaseous storage tanks. The system including anchoring an RFID device in a non-conductive blind boss, wherein the anchor material has a low dielectric and has minimal reflection if RF energy.

The present invention provides a Type 3 pressure vessel comprising a polar boss that is attached to a metallic liner and provides reinforced static strength, fatigue strength, endurance, chemical resistance and/or corrosion resistance of the liner orifice or neck region. In particular, the material of the polar boss has higher static strength, fatigue strength, endurance, chemical resistance and/or corrosion resistance relative to that of the liner material.

A propane tank with a valve passage containing a valve has a protection cap with a projecting pin which extends into the passage adjacent the valve to provide a secondary seal. The projecting pin is defined by an annular sleeve surrounding a hollow interior extending up to the upper wall where the sleeve has an outside surface tapered from the upper wall to the remote end and an inside surface tapered from the remote end to the upper wall and the passage carries an O-ring seal arranged so that movement of the upper wall in a direction away from the passage caused by pressure release is insufficient to cause release of the secondary seal between the projecting pin member from the O-ring seal. The projecting element extends into the hollow interior to a position beyond the remote end of an actuating pin of the valve.

There is provided a method for constructing a cylindrical tank, including the step of assembling a metal inner tank by individually and sequentially conducting, on an internal side of a PC wall, raising of an inner tank lateral plate by a jack-up unit and welding of a next-stage inner tank lateral plate onto a lower section of the raised inner tank lateral plate, further including the step of installing a guide pair configured to sandwich the raised inner tank lateral plate onto the next-stage inner tank lateral plate that is to be welded therebeneath. As a result, in the case of adopting the jack-up construction system, it is possible to prevent an inner tank lateral plate from being attached next from falling.