A pressure vessel, comprising: a vessel body having a rectangular parallelepiped shape for containing high pressure gas; a dividing wall in the form of a plate and disposed in the vessel body; and a plurality of ribs disposed on an outer surface of the vessel body. The vessel body includes: a top wall having a rectangular shape; a bottom wall having a rectangular shape and facing the top wall; and a surrounding wall joining a peripheral edge of the top wall and a peripheral edge of the bottom wall. The dividing wall is disposed in the vessel body to define a first chamber having a rectangular parallelepiped shape and a second chamber having a rectangular parallelepiped shape in cooperation with the vessel body. Each of the plurality of ribs extends over an entire circumference of the vessel body and along a plane perpendicularly intersecting the dividing wall.

A pressure vessel, comprising: a vessel body having a rectangular parallelepiped shape for containing high pressure gas; a dividing wall in the form of a plate and disposed in the vessel body; and a plurality of ribs disposed on an outer surface of the vessel body. The vessel body includes: a top wall having a rectangular shape; a bottom wall having a rectangular shape and facing the top wall; and a surrounding wall joining a peripheral edge of the top wall and a peripheral edge of the bottom wall. The dividing wall is disposed in the vessel body to define a first chamber having a rectangular parallelepiped shape and a second chamber having a rectangular parallelepiped shape in cooperation with the vessel body. Each of the plurality of ribs extends over an entire circumference of the vessel body and along a plane perpendicularly intersecting the dividing wall.

A ring and method of manufacturing a ring which may include: an outer ring, in which a second carbide composed of a combination of tungsten carbide, iron group carbide or carbonitride is mixed with a metal binder phase at a predetermined ratio, in which the outer ring is divided into a first outer ring and a second outer ring formed in a shape corresponding to each other; an inner ring separately and/or independently assembled between the first and second outer rings, in which the inner ring includes an outside inner ring that forms an outer circumferential surface of the ring and an inside inner ring that forms an inner circumferential surface of the ring; ring fitting parts formed on the first and second outer rings, respectively, such that both sides of the outer and inside inner rings are press-fit; and assembling protrusions formed on the first and second outer rings, respectively, to be inserted into the outer circumferential surface of the inside inner ring to maintain a firm assembly between the outer ring and the inner ring for a long period of time.

A ring and method of manufacturing a ring which may include: an outer ring, in which a second carbide composed of a combination of tungsten carbide, iron group carbide or carbonitride is mixed with a metal binder phase at a predetermined ratio, in which the outer ring is divided into a first outer ring and a second outer ring formed in a shape corresponding to each other; an inner ring separately and/or independently assembled between the first and second outer rings, in which the inner ring includes an outside inner ring that forms an outer circumferential surface of the ring and an inside inner ring that forms an inner circumferential surface of the ring; ring fitting parts formed on the first and second outer rings, respectively, such that both sides of the outer and inside inner rings are press-fit; and assembling protrusions formed on the first and second outer rings, respectively, to be inserted into the outer circumferential surface of the inside inner ring to maintain a firm assembly between the outer ring and the inner ring for a long period of time.

An apparatus for fabricating an internally finned pressure vessel includes a plurality of positioning discs, each of the positioning discs defining a plurality of circumferentially spaced slots extending radially into the positioning disc from a perimeter thereof, and one or more rods extending through the plurality of positioning discs, the plurality of positioning discs being held in axial alignment by the one or more rods. A method of fabricating the internally finned pressure vessel includes providing the apparatus, loading a plurality of fins into the slots of the positioning discs, inserting the apparatus containing the plurality of fins into a pressure vessel, attaching the plurality of fins to the pressure vessel by a brazing process, and removing the apparatus from the pressure vessel.

To alleviate stress exerted on a thread portion of a high pressure gas container including a metallic container to prevent fatigue fracture, there is provided a high pressure gas container comprising a metallic container, wherein the metallic container includes: a metallic cylinder; a female thread portion on an inner peripheral surface of the metallic cylinder at at least one end; and a lid having, on an outer peripheral surface, a male thread portion configured to screw into the female thread portion, and a maximum value of residual compressive stress at a position of 0.4 mm in a depth direction from a plurality of thread bottoms of the female thread portion and the male thread portion is 100 MPa or more, less than or equal to tensile strength of a material of the metallic cylinder, and less than or equal to tensile strength of a material of the lid.

To alleviate stress exerted on a thread portion of a high pressure gas container including a metallic container to prevent fatigue fracture, there is provided a high pressure gas container comprising a metallic container, wherein the metallic container includes: a metallic cylinder; a female thread portion on an inner peripheral surface of the metallic cylinder at at least one end; and a lid having, on an outer peripheral surface, a male thread portion configured to screw into the female thread portion, and a maximum value of residual compressive stress at a position of 0.4 mm in a depth direction from a plurality of thread bottoms of the female thread portion and the male thread portion is 100 MPa or more, less than or equal to tensile strength of a material of the metallic cylinder, and less than or equal to tensile strength of a material of the lid.

A multi-function pressure vessel suited for installation in a heat transfer fluid system. The multi-function pressure vessel comprises: a tank defining an internal volume, a bladder dividing the internal volume into a heat transfer fluid chamber for ac commodating expansion fluid and a pressurized gas chamber adapted to be filled with a pressurized gas. The tank has a heat transfer fluid inlet for receiving an incoming flow of heat transfer fluid from the heat transfer fluid system and a heat transfer fluid outlet connected in fluid flow communication with the heat transfer fluid inlet by an internal pipe mounted in the heat transfer fluid chamber. The internal pipe has perforations defined therein. An air vent at an upper end of the heat transfer fluid chamber is provided for venting any air bubbles passing through the perforations in the internal pipe. A drain valve may be provided at a bottom end of the heat transfer fluid chamber for removing dirt particles flowing through the perforations in the internal pipe.

A multi-function pressure vessel suited for installation in a heat transfer fluid system. The multi-function pressure vessel comprises: a tank defining an internal volume, a bladder dividing the internal volume into a heat transfer fluid chamber for ac commodating expansion fluid and a pressurized gas chamber adapted to be filled with a pressurized gas. The tank has a heat transfer fluid inlet for receiving an incoming flow of heat transfer fluid from the heat transfer fluid system and a heat transfer fluid outlet connected in fluid flow communication with the heat transfer fluid inlet by an internal pipe mounted in the heat transfer fluid chamber. The internal pipe has perforations defined therein. An air vent at an upper end of the heat transfer fluid chamber is provided for venting any air bubbles passing through the perforations in the internal pipe. A drain valve may be provided at a bottom end of the heat transfer fluid chamber for removing dirt particles flowing through the perforations in the internal pipe.

The present invention refers to a composite material that comprises carbon fiber or sheet made from polyacrylonitrile (PAN) or lignin being indicated for the manufacture of several articles such as high resistance pressure cylinder. Said material presents several advantages such as, for example, to provide improved screening to the articles that comprise it.

The referred composite comprises: a first inner layer of polytetrafluorethylene, covered by a second layer of high-density polyethylene, adhered to a third layer of composite containing carbon fiber or sheet made from polyacrylonitrile (PAN) or lignin immersed in cured epoxy resin from a polymeric matrix and a hardener; and a fourth outer layer of composite, comprising aramid fiber impregnated with a dilating fluid and cured epoxy resin from a polymeric matrix and a hardener.