Abstract:
A method of making an annular component includes forming sheet feedstock into an annular shape disposed about a central axis; and bonding one portion of the feedstock to another portion of the feedstock using ultrasonic welding, so as to fix the annular shape.
Abstract:
The polymeric pipes reinforced with a metal casing are used for transporting oil and gas, acids, alkali products, drinking water and industrial water, and also in the transportation of aggressive and neutral pulps. A metal-containing polymeric reinforced pipe includes a welded metal casing and a polymeric matrix having an amorphous-phase-based molecular structure. The metal-containing polymeric reinforced pipe is produced by extrusion moulding with simultaneous feeding of a polymer melt and the reinforcing metal casing into the mould cavity, followed by intensive cooling of the internal and external surfaces of the pipe being moulded. The invention increases the quality and endurance limit in the radial direction of the metal-containing polymeric reinforced pipe, productivity of the process for manufacturing the pipe, and also the strength and technological effectiveness of a pipeline constructed from the pipes produced.
Abstract:
A method for creating an improved coiled tubing is provided, comprising cleaning a sheet metal workpiece using an electroplasma process to remove oxide scale and other contaminants on surfaces of the workpiece; applying a first metal coating to the workpiece using the electroplasma process; forming the sheet metal workpiece into a tube having abutting edges to form a seam; welding the seam to complete the formation of the tube; grinding the seam to establish a smooth exterior surface on the seam; applying a second metal coating to the seam of the tube using the electroplasma process; and coiling the tube around a spool.
Abstract:
An apparatus and a process are disclosed for straw tube formation utilized in manufacturing boron coated straw neutron detectors. A preferred embodiment of the process for creating a thin walled straw for use in a boron-coated straw neutron detector comprises providing foil having a boron coating on a surface, forming the coated foil into a cylindrical tube having a longitudinal seam and the boron coated surface on the inside of the cylindrical tube, and then ultrasonically welding closed the seam of the tube. Optionally, the cylindrical tube can then be drawn through a die to form a straw tube having a non-circular cross section, preferably a star-shaped cross section.
Abstract:
A method for encasing a body of an exhaust gas system with a housing which is wound around the body. Using a winding method, the body is placed in a loop formed by a belt-shaped conveyor element that can be driven in a conveyor device, wherein the conveyor element is seated against the outer casing face at a wrapping angle u of at least 270 degrees. Starting with a first edge, the metal strip is then introduced in a conveyor device between the body and the conveyor element, is drawn into the gap between the body and the conveyor element and is bent around the body until the body is encased at least twice by the metal strip.
Abstract:
A composite conduit suitable for transporting corrosive and/or erosive fluids including gases, liquids or slurries, is formed by positioning a tube formed of a material having desirable corrosion and/or erosion resistant properties within a pipe formed of a commonly weldable material such that one end of the tube is aligned with one end of the pipe. The tube has an outer diameter slightly less than the inner diameter of the pipe. The tube is affixed to the pipe by connecting the aligned ends thereof, and the pipe is compressed in a reducing operation so that the inner diameter of the pipe is reduced to a diameter that is less than or equal to the outer diameter of the tube. Adjacent, end-to-end sections of the composite conduit are connected using a coupling that employs a cylindrical body formed of the same material as the tubes of the conduits. The coupling body has an outer diameter that is slightly less than the inner diameter of the tubes of the conduits, and preferably an inner diameter that varies to form a taper at each end of the body. The body further contains a circumferential recess intermediate the ends of the body, and a ring formed of the same material as the tubes of the conduits. The ring is positioned within the recess of the body and has a circumferential stop means for limiting movement of the ends of the body within the respective ends of the conduits by the ends of the conduits abutting the stop means. At least one circumferential seal is positioned intermediate the recess and each of the tapered ends of the body for sealing the interconnected conduits. An insulator is preferably positioned in the recess between the ring and the coupling body for inhibiting the transfer of heat produced by welding the ends of the conduits together, although the insulator is not essential in all embodiments.
Abstract:
A process and apparatus for continuously forming and coating a tube with a braze alloy. The apparatus includes a device for continuously delivering tubing material to a device that forms a continuous tube from the tubing material, a device for preheating the tube, a device for depositing the braze alloy on the tube, a device for cooling the tube and the braze alloy layer before the surface of the braze alloy layer oxidizes, and optionally a device for sizing the tube. The deposition device includes an enclosure and at least one thermal spray gun that receives a metallic material from the source, heats the metallic material, and deposits the metallic material through an inert gas to form a layer of the braze alloy on the surface of the tube as the tube continuously travels through the enclosure.
Abstract:
An aluminum-made heat exchanger including a flat tube is formed by, using an aluminum strip-shaped material coated with a brazing metal on the outer surface of a core metal and coated with a sacrificial anode material at the inner surface side thereof, bending the strip-shaped material in the width direction thereof, wherein many flat tubes are diposed parallel with each other and joined using a flux in a furnace. In order to provide the aluminum-made heat exchanger capable of being satisfactorily brazed and a high strength after brazing, the brazing metal is of an Al—Si alloy, core metal is an Al—Si alloy including Si of 0.4 to 1.2% by weight, and the sacrificial anode material is of an Al—Mg—Zn alloy including Mg of 0.3 to 0.75% by weight.
Abstract:
The invention relates to a method for manufacturing a sectionally reinforced member made of a tubular hollow profile (1) made of metal. For sectional reinforcement of the hollow profile (1), a sleeve (3) made of metal is slid onto the hollow profile (1) and on the entire area of the section to be reinforced is bonded with bonding agent (2), so that the wall of the tubular hollow section (1) and the sleeve (3) as a result of the bonding agent (2) form a bond. In order to facilitate sliding the sleeve (3) onto the hollow profile (1), the sleeve (3) is enlarged by heating, and/or the external dimensions of the hollow section (1) are reduced by cooling. Forming the hollow section (1) comprising the sleeve (3) into a member takes place prior to a finishing additional treatment step for the purpose of curing the bonding agent (2).
Abstract:
The invention pertains to a flat product in the form of a wall for a heat exchanger that is operated with cooling mediums in the form of corrosive liquids that contain biological organisms. In order to protect the wall of the heat exchanger against corrosion on the side that comes in contact with the cooling medium and to prevent biological organisms from settling down on the heat exchanger wall, the wall consists of a titanium or titanium alloy layer and a copper/titanium alloy layer that is integrally connected to the titanium or titanium alloy layer by means of an intermediate alloy layer.