| Patents for B21B 19 - Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work (1,478) |
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| 06/18/2013 | US8464568 Production method of seamless pipe or tube, and oxidizing gas supply unit |
| 06/18/2013 | US8464565 System for supplying lubricant, apparatus for manufacturing seamless pipes or tubes, and method of manufacturing seamless pipes or tubes |
| 06/13/2013 | US20130145808 Tapered-roll stand for making seamless pipe |
| 06/13/2013 | DE102011120890A1 Verfahren zur Herstellung eines mehrschichtigen Metallrohres und danach hergestelltes mehrschichtiges Metallrohr A method for producing a multilayer metal tube and thereafter produced multilayer metal tube |
| 06/12/2013 | EP2602032A1 Method for producing a multilayer metal tube and multilayer metal tube produced accordingly |
| 06/12/2013 | EP2602031A1 Cone piercing mill for producing seamless tubes |
| 06/12/2013 | CN103146956A Titanium alloy pipe and manufacturing method |
| 06/05/2013 | CN202963044U Pushing device of perforating machine |
| 06/05/2013 | CN202963043U Piston fixing device for perforating pusher |
| 06/05/2013 | CN103131897A 110ksi-level titanium alloy oil well pipe and production method thereof |
| 06/05/2013 | CN103128102A Production method of titanium alloy oil well pipe |
| 05/29/2013 | CN202951705U Two-roller reducing equipment |
| 05/29/2013 | CN202951704U Combined three-roller tandem mill |
| 05/22/2013 | CN103114249A Method for producing medium-wall 20G seamless steel pipe by using controlled rolling instead of normalizing |
| 05/10/2013 | WO2013065780A1 Boring device, plug used in boring device, and method for manufacturing steamless steel pipe |
| 05/10/2013 | WO2013065554A1 Seamless-metal-pipe manufacturing method |
| 05/10/2013 | WO2013065553A1 Seamless-metal-pipe manufacturing method |
| 05/10/2013 | CA2853758A1 Piercing apparatus, plug used for piercing apparatus, and method for producing seamless steel pipe |
| 05/08/2013 | CN102319739B Rolling angle adjusting device for two-roller skew rolling piercing mill |
| 05/01/2013 | CN202910072U Adjustable guide device for tube sizing mill |
| 05/01/2013 | CN101610854B Device and method for monitoring manufacturing status of seamless pipe and seamless pipe manufacturing facility |
| 04/24/2013 | CN202893838U Locking device of guide plate of large-scale perforating host machine |
| 04/24/2013 | CN202893820U Guiding device using rotary bolt as guiding |
| 04/24/2013 | CN202893819U Roller mechanism of air compressor |
| 04/24/2013 | CN202893810U Mandrel holding piercing plug |
| 04/24/2013 | CN202893809U Double-end, multi-line and multi-roll cold reducing mill |
| 04/24/2013 | CN202893808U Balancing device of lower rotary drum of perforating host machine |
| 04/17/2013 | CN103042036A Hot rolling repair machine for pipeline |
| 04/10/2013 | CN202860982U Rollers of steel tube sizing and reducing mill and steel tube sizing and reducing mill using the same |
| 04/09/2013 | US8413474 Monitoring apparatus and monitoring method of seamless pipe or tube production conditions and manufacturing facilities of seamless pipe or tube |
| 04/03/2013 | CN202845439U Pipe diameter shrinker |
| 04/03/2013 | CN202845438U Pipe diameter compressor |
| 04/03/2013 | CN202845437U Hole pattern of micro tension tube reducing unit |
| 04/03/2013 | CN103008350A Turnable puncher top centering roll device |
| 04/03/2013 | CN103008348A Skew rolling pipe rolling mill set |
| 03/28/2013 | US20130074563 Tube rolling plant |
| 03/27/2013 | CN202824141U Locking device capable of horizontally adjusting rolled tube of straightening machine and bar loosing machine |
| 03/27/2013 | CN102989774A Combined three-roller continuous rolling mill |
| 03/27/2013 | CN102989773A Construction method for improving centring accuracy of racks of steel tube perforating machines |
| 03/27/2013 | CN102294456B Manufacturing method for oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank |
| 03/27/2013 | CN101977703B Method of producing seamless metal tube and punch for use therein |
| 03/27/2013 | CN101804564B High-efficiency short-flow production line of composite material of high-alloy steel and high-alloy steel |
| 03/20/2013 | CN202803775U Puncher three-roller guiding device |
| 03/20/2013 | CN202803751U Perforating plug |
| 03/20/2013 | CN202803750U Upper ejector roller for pre-rotation of ejector rod |
| 03/20/2013 | CN202803746U Square pipe roll device and square pipe squaring machine with the same |
| 03/20/2013 | CN102974615A Rolling process method of punched lining core of steel rod |
| 03/20/2013 | CN102133581B Nut locking device and method for seamless steel tube sizing mill |
| 03/13/2013 | CN202779197U Receiving groove device for perforating machine |
| 03/13/2013 | CN202779186U Fixing device of two-section rack on outlet platform of perforating machine |
| 03/13/2013 | CN202779162U Single-head and multi-wire and multi-roll cold reducing mill |
| 03/13/2013 | CN102962256A Mandrel trolley and mandrel replacing device |
| 03/06/2013 | CN202762727U Longitudinal submerged arc welding steel pipe sizing mill |
| 03/06/2013 | CN202762726U Production unit for hot-rolled seamless steel tubes |
| 03/06/2013 | CN102950154A Assembly for rolling mill, has rolling stand with framework base body and mounting element movable relative to framework base body, where swing arm is movable relative to framework base body |
| 03/05/2013 | US8387430 Tube rolling plant |
| 02/27/2013 | CN202752325U Stretch reducing mill rack moving beam device with locking mechanism |
| 02/21/2013 | WO2012121907A3 Temperature dependent swelling of a swellable material |
| 02/20/2013 | CN202741425U Double-roll skew-roll piercer |
| 02/13/2013 | CN202725617U Composite alloy plug |
| 02/13/2013 | CN202725615U Integrated composite alloy plug |
| 02/07/2013 | WO2013018564A1 Controlled rolling method of seamless steel tube excellent in strength and low-temperature toughness |
| 02/06/2013 | CN202715614U Seamless steel tube diameter-increasing and wall-thinning hot mill |
| 02/06/2013 | CN101652196B Boring machine |
| 02/05/2013 | CA2611870C Method of making a seamless hollow body from steel |
| 01/30/2013 | CN202700974U Mounting structure for conveyer belt roller of cold centering machine |
| 01/30/2013 | CN202700973U Installation structure for pressing head device of cold centering machine |
| 01/30/2013 | CN202700972U Installation structure for main shaft of cold centering machine |
| 01/30/2013 | CN202700952U Lower rotary drum device of punching machine |
| 01/30/2013 | CN202700947U Anti-lock device of built-in roller of punching machine |
| 01/30/2013 | CN202700946U Lower rotary drum of punching machine |
| 01/30/2013 | CN102896151A Push rod push-and-pull device |
| 01/23/2013 | CN202683659U Novel titanium pipe molding and rolling unit |
| 01/23/2013 | CN202683614U Output structure for three-roller five-frame sizing mill speed reducer |
| 01/23/2013 | CN202683611U Sizing mill capable of being adjusted in roll gap manually |
| 01/23/2013 | CN202683600U High-efficient perforating machine back stage |
| 01/16/2013 | CN102873100A Three-roller full-floating mandrel continuous pipe rolling mill and rolling process thereof |
| 01/16/2013 | CN102247988B Method for producing gas cylinder pipe with diameter of phi610 to 720 for natural gas underground storage well |
| 01/09/2013 | CN102861768A Circular tube billet hot centering machine |
| 01/09/2013 | CN102861767A Hot centering machine for two-way circular tube blank |
| 01/09/2013 | CN102861766A Square tube rolling device, square tube sizing mill with same and production method of square tube |
| 01/02/2013 | CN102847712A Pipe size contracting machine for pipes |
| 01/02/2013 | CN102847711A Pipe diameter shrinking machine |
| 12/26/2012 | CN202621579U Structure of opening hydraulic cylinder device of three-roller centering unit |
| 12/26/2012 | CN202621567U Novel replacing and clamping device for piercing mill guide plate |
| 12/26/2012 | CN202621555U High-frequency straight seam welded steel pipe sizing equipment |
| 12/26/2012 | CN202621554U Hoisting structure for receptacle trough of front table of puncher |
| 12/26/2012 | CN101850363B Technology and device for forming hollow anchor stock in one step through reduction (phi 40-phi 50) hot rolling |
| 12/20/2012 | WO2012173510A1 Method for producing seamless tubes |
| 12/19/2012 | CN202606492U Hot-rolled seamless steel tube sizing mill |
| 12/19/2012 | CN101683661B Method for improving rolling quality of barrel-shaped puncher for rolling hollow billet |
| 12/18/2012 | US8333092 Piercer, plug and method of manufacturing seamless pipe or tube |
| 12/13/2012 | DE102011116666A1 Vorrichtung und Verfahren zum Walzen von Rohrluppen An apparatus and method for rolling tube blanks |
| 12/12/2012 | EP2532449A2 Device and method for rolling hollow blanks |
| 12/12/2012 | CN202591217U Feeding mechanism for three-roller reducing mill |
| 12/12/2012 | CN102814331A Device and method for rolling of pipe blanks |
| 12/12/2012 | CN102814330A Process and device for producing hot-rolled seamless steel pipe |
| 12/12/2012 | CN101912880B Novel planetary tube rolling mill |
| 12/05/2012 | CN101980801B High-alloy seamless steel pipe manufacturing method |
| 11/28/2012 | CN202555601U Propping rod pre-rotating transmission device |