| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 072368000 | Making | 19 |
| 20080257008 | High Strength Welded Steel Tube Superior in Hydrogen Embrittlement Cracking Resistance of Weld Metal and Method of Production of Same - The present invention provides a high strength welded steel pipe superior in weld zone embrittlement crack characteristics and a method of production of the same, that is, a method of production of a welded steel pipe superior in hydrogen embrittlement cracking resistance of weld metal characterized by seam welding from the inner and outer surfaces by a tensile strength of 850 MPa or more, then expanding or reducing the size of the pipe for correction, which method of production of welded steel pipe characterized in that the hydrogen concentration of the preceding weld metal is 0.2 cc or less per 100 g at ordinary temperature. | 10-23-2008 |
| 20090056405 | METHOD OF MACHINING METALLIC TUBES - A method of machining a tube includes performing an obverse drawing process to the tube, where the obverse drawing process draws the tube in an obverse drawing direction from a first end toward a second end of the tube. The tube is turned around to perform a reverse drawing process, where the reverse drawing process draws the tube in a reverse drawing direction from the second end toward the first end of the tube. The obverse and the reverse drawing processes are alternately performed until the tube is thinned to a desired thickness. | 03-05-2009 |
| 20090205392 | LUBRICANT FOR HOT METAL WORKING AND POWDER LUBRICANT COMPOSITION FOR HOT METAL WORKING - The present invention provides a lubricant for hot metal working which is capable of inhibiting generation of white scale, attributed to the lubricant, on the surface of a workpiece material and is capable of improving lubricity to obtain favorable appearance of the finished product. The lubricant for hot metal working comprises a silicate compound used for adding to a lubricant composition mainly containing sodium borate. | 08-20-2009 |
| 20090288467 | MULTI-LAYER PIPE AND METHOD FOR ITS MANUFACTURE - A method for manufacture of a multi-layer pipe ( | 11-26-2009 |
| 20100000286 | Welded Component Comprising Seamless Bent Pipe and Seamless Straight Pipe Sections and Methods of Manufacturing Thereof - Provided are a seamless bent pipe constituted by a bent section and straight pipe sections on both ends of the bent section, with the inside diameter at each pipe end portion being larger than the inside diameter of the bent section, and a welded component comprising a seamless bent pipe and a seamless straight pipe at one or each end of the seamless bent pipe, with the end of the seamless straight pipe to be welded to one or each end of the seamless bent pipe having the same inside diameter as the inside diameter of the seamless bent pipe, as well as methods of manufacturing them. As a result, elements suited for use in pipelines can be obtained, without unnecessarily increasing the wall thickness of the seamless bent pipe and without internal machining of the pipe end portions of the seamless bent pipe after the manufacturing thereof. | 01-07-2010 |
| 20100170320 | METHOD FOR MANUFACTURING A HIGH ALLOY PIPE - A method for manufacturing a high alloy pipe comprises hot working, a high alloy material pipe having controlled amounts of C, Si, Mn, P, S, Ni, Cr, Mo, Cu, Al, N, O, and optionally Ca, Mg, and rare earth elements, with the balance Fe. The pipe composition satisfies the formula N×O≦0.001. The pipe is subjected to cold working to form the high alloy pipe, wherein the final cold working process is performed under the condition that a working ratio Rd in the reduction of area satisfies 15≦Rd(%)≦370×(C+N), where N, O and C are the contents (by mass percent) of the respective elements, and Rd is the working ratio (%) in the reduction of area. The pipe has an excellent ductility and an excellent corrosion resistance when cold working is performed to obtain a high strength after pipe-making. | 07-08-2010 |
| 20110056263 | Method for Producing Seamless Pipe and Method for Determining Length of Billet for Use in Producing Seamless Pipe - Seamless pipes are produced by using billets for which the length L of a parent billet, the lengths l of child billets and the number n | 03-10-2011 |
| 20110146366 | PRODUCTION-OPTIMIZED PROCESS FOR PRODUCING A MULTILAYER PIPE - A process for producing a multilayer pipe ( | 06-23-2011 |
| 20110162431 | Partially reinforced hollow profile - A method for producing partially reinforced hollow profiles made of a metal, particularly steel, or a steel alloy includes forming a blank, together with a plurality of reinforcing metal elements arranged on the blank, into a hollow profile using the rolling-in technique or by means of U-O forming, wherein after forming the reinforcing elements arranged on the blank are connected to the formed blank at least by means of a positive interengagement. This method provides a simple and cost-effective procedure for producing reinforced hollow profiles made of metal. | 07-07-2011 |
| 20110174046 | METHOD FOR PRODUCING A LARGE STEEL TUBE - The invention relates to a method for producing a steel tube, wherein a steel sheet ( | 07-21-2011 |
| 20110174047 | PROCESS FOR THE MANUFACTURING OF AN ELONGATED TUBE AND USE OF THE TUBE - This invention relates to a process for the manufacture of an elongated tube, the process comprising the following steps: (a) forming a rotating temporary tube ( | 07-21-2011 |
| 20110179849 | Multi-Layered Pipes For Use In The Hydrocarbon Industry, Methods of Forming The Same, And Machines For Forming The Same - Multi-layered pipes, machines for forming multi-layered pipes, and methods of forming multi-layered pipes, such as for use in the hydrocarbon industry as may form high-pressure pipelines including forming an inner metal tube from a first metal stock, and while forming the inner metal tube, forming at least a second metal tube around the inner tube from at least a second metal stock. In some methods, sheet metal is bent to form tubes having seams, which are welded while the tubes are being formed. Some methods are performed proximate to an installation site for the multi-layered pipe, such as a hydrocarbon extraction or transportation site. Some methods are performed on a vehicle and proximate to an installation site. | 07-28-2011 |
| 20110226032 | PIPE-BENDING PRESS - According to the invention a flat metal plate for the manufacture of pipe is first oriented generally horizontally on horizontally spaced and longitudinally extending supports. A longitudinally extending center tool is pressed down against the workpiece between the supports so as to downwardly plastically deform the workpiece while simultaneously a brace body is pressed with an upward force against the plate directly opposite the center tool so as to hold the plate in contact with the center tool. The center tool and brace body are then synchronously displaced downward relative to the supports with the plate clamped between the center tool and brace body. | 09-22-2011 |
| 20120260713 | METHOD FOR FORMING A DUCT - An apparatus for forming a duct includes a bending apparatus and a support apparatus. The bending apparatus includes a table, a cut off beam, and a leaf hinged to a forward edge of the table. The cut off beam is movable toward and away from the table to clamp or release a metal web being fed forward across the table and the leaf. The cut off beam repeatedly clamps the metal web to the table while the leaf pivots toward the cut off beam to form a duct section. The support apparatus includes a cross rod movable along pivoting support arms. As the metal web is bent to form the duct section, the support arms and the cross rod are moved to internally support the duct section. | 10-18-2012 |
| 20130327116 | METHOD FOR DESIGNING MATERIAL TO BE SUBJECTED TO CYLINDER FORMING AND PRODUCT FORMED BY PERFORMING CYLINDER FORMING - An object of the present invention is to provide a method for designing a metal material having mechanical properties with which a specified spring back angle can be achieved after any one of metal materials having a wide variety of mechanical properties and thicknesses has been formed by performing cylinder forming and a product formed by using the method. A method for designing a material to be subjected to cylinder forming, the method including, in the design of a metal material to be subjected to cylinder forming in which the metal material is formed by performing bending forming, calculating the yield strength YP, the Young's modulus E and the thickness t of the metal material so that a spring back angle Δθ becomes a specified value when cylinder forming is performed under conditions of a radius of curvature of bending r of 5 mm or more and a bending angle θ of 90 degrees or more and 180 degrees or less and designing the metal material so that the metal material has the calculated yield strength YP and Young's modulus E. | 12-12-2013 |
| 20140033789 | PROCESS FOR MANUFACTURING A YANKEE CYLINDER - The invention relates to a process for manufacturing a steel Yankee cylinder ( | 02-06-2014 |
| 20140047893 | FABRICATION MEMBER - A method of making a composite tube-shaped fabrication member by providing in coils a first planar member suitable to form a flange of a tube-shaped fabrication member, two second planar members suitable to form web portions of a tube-shaped frame member, and two third planar members suitable to form a portion of a flange of the tube-shaped member, uncoiling the coils fo first, second, and third planar members and passing them through accumulators, aligning the first, second, and third planar members adjacent respective side portions and attaching side portions of each planar member to respective side portions of adjacent planar members to form a composite intermediate product, and cold-forming to form a composite fabrication member of a desired shape. | 02-20-2014 |
| 20140137623 | Method for Producing a Mold Tube - A method for producing a mold tube from copper or a copper alloy for a continuous casting mold, a tube blank being formed on a mandrel, which determines the inner shape of the mold, by the external application of force, and, following the shaping process, the mandrel being removed from the mold tube ( | 05-22-2014 |
| 20140190236 | SUPPLY DEVICE, AND METHOD FOR SUPPLYING BAND-LIKE MEMBER - A feeding device ( | 07-10-2014 |
