| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 138142000 | Brazed, soldered or welded | 10 |
| 20090308481 | Cu/Al COMPOSITE PIPE AND A MANUFACTURING METHOD THEREOF - A Cu/Al composite pipe and a manufacturing method thereof are disclosed. The inner layer of the pipe is Cu, and the outer layer is Al. The combinative layer is formed between the two layers due to mutual diffusion of Cu and Al. The raw composite pipe is rolled with single rolling by a planetary rolling machine, wherein the rolling process has the single pass percentage reduction of area of 50%˜95%, an exit rolling speed of 5˜30 m/min, a temperature in the deformation area of 200° C. ˜600° C. The pipe can be used in many fields, such as architecture, refrigeration, air-conditioners, refrigerators, solar energy, water heaters, condensers and radiators, etc. | 12-17-2009 |
| 20100206420 | FLOW METER FOR MULTIPHASE FLUIDS - There is described a flow pipe ( | 08-19-2010 |
| 20100269945 | METHOD OF AND APPARATUS FOR CONTINUOUSLY PRODUCING A TWIN-WALL PIPE COMPRISING PIPE SOCKET AND TWIN-WALL PIPE - A twin-wall pipe comprises an internal pipe and an external pipe. The external pipe is corrugated, having elevations and troughs. The twin-wall pipe is further provided with a socket. In a transition portion towards the twin-wall pipe and the socket, provision is made for at least one overflow passage which interconnects the clearance between the external pipe and internal pipe in the vicinity of the transition portion and an adjacent elevation. a≧b refers to the radial height b of the overflow passage relative to its width a in the circumferential direction. | 10-28-2010 |
| 20100288391 | EXHAUST SYSTEM WITH TAILORED WALL THICKNESS - A tube for an exhaust system includes, an add-on part that is firmly connected with the tube by a brazing seam. | 11-18-2010 |
| 20110041946 | METHOD FOR THE PRODUCTION OF A HIGH-PRESSURE ACCUMULATOR PIPE OF STEEL FOR FUEL INJECTION SYSTEMS AND HIGH-PRESSURE ACCUMULATOR PIPE PRODUCED ACCORDING TO THIS METHOD - In a method of making a high-pressure accumulator pipe as composite pipe of steel for pressures of up to 1800 bar and above with high static strength and fatigue strength for fuel injection systems with common rail systems for internal combustion engines, a first inner pipe part is inserted into a second outer pipe part with little clearance, and the inner pipe part is connected to the outer pipe part gap-free and by interference fit through mechanical forming. The mechanical forming includes a rolling-in process, wherein the inner pipe part is subjected to a ductile expansion and the outer pipe part is subjected to an elastic expansion using an oversized rolling tool that is moved within the inner pipe part, and wherein a residual compressive stress adjusted to the operating pressure is applied to the inner pipe part after the forming process via the elastic resilience of the outer pipe part. | 02-24-2011 |
| 20110297270 | TECHNIQUE FOR APPLYING PROTECTIVE COVERING TO PIPES AND TUBES - The manufacture of clad tubes ( | 12-08-2011 |
| 20120018028 | HIGH STRENGTH STEEL PIPE FOR LOW-TEMPERATURE USAGE HAVING EXCELLENT BUCKLING RESISTANCE AND TOUGHNESS OF WELDED HEAT AFFECTED ZONE AND METHOD FOR PRODUCING THE SAME - An APIX100-grade high strength steel pipe includes a base material containing, in mass percentage, C: more than 0.03% and 0.08% or less, Si: 0.01% to 0.5%, Mn: 1.5% to 3.0%, P: 0.015% or less, S: 0.005% or less, Al: 0.01% to 0.08%, Nb: 0.005% to 0.025%, Ti: 0.005% to 0.025%, N: 0.001% to 0.010%, O: 0.005% or less, and B: 0.0003% to 0.0020%, further contains one or more of Cu, Ni, Cr, Mo, and V, satisfies 0.19≦P | 01-26-2012 |
| 20140076452 | METHOD FOR PRODUCING A TUBE OR SEMI-FINISHED TUBE AND TUBE OR SEMI-FINISHED TUBE FOR CHEMICAL APPARATUS CONSTRUCTION - The invention relates to a tube ( | 03-20-2014 |
| 20140345742 | COILED TUBING WITH HEAT RESISTANT CONDUIT - Coiled tubing is provided with one or more conduits passing through and secured to an inner wall of the coiled tubing. The conduits are resistant to annealing temperatures and therefore are welded to flat plate which is used for forming the coiled tubing or are retained in a groove formed in the inner wall of the coiled tubing. When the coiled tubing is formed by rolling the flat plate into a slit tubular and seam welding the longitudinal joint, the coiled tubing and the heat resistant conduits are annealed. The conduit can be wireline, electric line, cable or an empty tubular, all of which are resistant to the annealing temperatures. The empty tubular can be used to retain a secondary conduit such as heat labile fiber optic cable which is run into the empty tubular, such as by pumping or floating, after the annealing process. | 11-27-2014 |
| 20190145570 | CORROSION-RESISTANT PIPING AND METHODS OF MANUFACTURING AND USING THE SAME | 05-16-2019 |
