| 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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| 06/22/2011 | CN201871533U Novel seamless steel tube perforating and heating device |
| 06/15/2011 | CN201862619U Novel three-roller rotary sizing mill |
| 06/15/2011 | CN201862618U Novel composite roll piercing mill for producing large-diameter seamless steel pipes |
| 05/18/2011 | CN201832847U Cold centering machine |
| 05/18/2011 | CN102059251A Four-roll planetary tube hot rolling machine |
| 05/17/2011 | US7942028 Formation of a curl in a unitary closable container |
| 05/11/2011 | EP2318158A1 Rolling mill of rotating expander type for tubular bodies with tip-stabilizing system |
| 05/04/2011 | CN201815542U Build-up welding composite plug of perforating machine |
| 05/04/2011 | CN102046305A Rolling mill of rotating expander type for tubular bodies with tip-stabilizing system |
| 05/04/2011 | CN102039315A Method for installing large conical puncher device |
| 05/04/2011 | CN102039313A Method for producing large-diameter seamless steel pipe for gas cylinder |
| 05/04/2011 | CN102039312A Novel high-efficiency compact type hot rolling seamless steel pipe production process |
| 05/04/2011 | CN102039311A Short-flow longitudinal rolling production method for small-bore high-alloy seamless steel pipe |
| 04/28/2011 | WO2011047524A1 Three-roller planetary rolling method for rolling brass pipe |
| 04/27/2011 | CN201807605U Open rack three-roller skew rolling stretching machine |
| 04/27/2011 | CN101658866B Direct pressure three-roller continuous rolling mill |
| 04/20/2011 | CN201799454U Clamp holder for replacement of guide plates |
| 04/20/2011 | CN201799449U Locking ejector head device |
| 04/20/2011 | CN102019293A Hydraulic control system for replacing top of perforation machine |
| 04/13/2011 | CN201791745U Fastening device for material feeding guide sleeve for piercing mills of seamless steel pipes |
| 04/07/2011 | WO2011039943A1 Retract mandrel mill and method for rolling tubing |
| 04/06/2011 | CN101410195B Method for manufacturing seamless pipe |
| 03/30/2011 | CN201776291U Control system for stabilizing central rolling line of perforating machine |
| 03/23/2011 | CN101559448B Evacuation device for mandril of perforator |
| 03/16/2011 | EP2295159A1 Method of producing seamless metal tube and punch for use therein |
| 03/16/2011 | CN201760447U Main driving device for sizing mill |
| 03/16/2011 | CN101985132A Method for producing thermally tandem-rolled seamless steel pipes |
| 03/16/2011 | CN101605616B Process for producing seamless steel pipe made of high-chromium high-nickel alloy steel |
| 03/02/2011 | CN101376135B Method for producing improved stainless steel seamless steel pipe |
| 03/01/2011 | US7895870 Method for producing ultra thin wall metallic tube with cold working process |
| 02/24/2011 | US20110041661 Rotary Cutting Tool, Method of Cutting Billet for Manufacturing Seamless Pipe or Tube, and Method of Manufacturing Seamless Pipe or Tube |
| 02/23/2011 | EP2286934A1 High-alloy seamless steel pipe manufacturing method |
| 02/23/2011 | CN201751022U Equipment for forming hollow anchor rods at one step by reducing hot rolling |
| 02/23/2011 | CN101980802A Method for producing seamless pipe |
| 02/23/2011 | CN101980801A High-alloy seamless steel pipe manufacturing method |
| 02/16/2011 | CN101977703A Method of producing seamless metal tube and punch for use therein |
| 02/16/2011 | CN101972776A Hot rolling production process of automatic tube rolling mill |
| 02/16/2011 | CN101559436B Quick connecting device for punch top and mandril of perforator |
| 02/09/2011 | EP2281641A1 Method for producing seamless pipe |
| 02/09/2011 | CN201735585U Grouped two-roll reducing mill |
| 02/09/2011 | CN201735584U Grouping three-roller size-reducing mill |
| 02/03/2011 | US20110023570 Method for Producing High-Alloy Seamless Steel Pipe |
| 02/03/2011 | US20110023569 Method for Producing Seamless Pipe |
| 01/26/2011 | EP1649945B1 Drilling/rolling method in manufacturing seamless tube |
| 01/26/2011 | CN201720249U Seamless steel pipe top rolling mill and roller dies |
| 01/26/2011 | CN101954377A Full-floating mandrel tandem-rolling seamless steel pipe production process |
| 01/26/2011 | CN101444792B Method for producing seamless steel pipes used for large-diameter high-pressure gas cylinders |
| 01/19/2011 | CN201711338U Novel planetary pipe mill |
| 01/13/2011 | WO2011003501A1 Method and apparatus for ironing roller spinning |
| 01/13/2011 | US20110005291 Method and apparatus for forming undulating conduit |
| 01/12/2011 | CN101518782B Centering roller with compact structure |
| 01/05/2011 | CN201692995U Modularized combined type reducer of sizing mill |
| 01/05/2011 | CN201692992U Nut locking device for seamless steel tube sizing mill |
| 01/05/2011 | CN201692983U Novel sizing mill |
| 01/05/2011 | CN101935808A 130ksi steel-grade low-temperature drill rod with high toughness and corrosion resistance and manufacturing method thereof |
| 01/04/2011 | CA2542181C Apparatus for rectifying round pipe and tubing |
| 12/29/2010 | EP1676652B1 Method of manufacturing a tube shell for manufacturing seamless steel tube |
| 12/29/2010 | CN101927260A Seamless steel pipe hot-rolling multiple perforation production process |
| 12/29/2010 | CN101553327B Manufacturing method for seamless pipe |
| 12/29/2010 | CN101444793B Method for fabricating seamless steel pipes for large-diameter high-pressure gas cylinders used in trailer production |
| 12/22/2010 | CN101921957A Method for manufacturing high-grade anti-corrosion seamless steel tube with large diameter ranging from phi460.0 mm to 720.0mm |
| 12/22/2010 | CN101920263A Method for producing medium and small aperture seamless steel tube by reducing and rolling hollow continuous cast tube blank |
| 12/15/2010 | CN201669268U Puncher mandril follow-up supporting vehicle |
| 12/15/2010 | CN101912880A Novel planetary tube rolling mill and planetary rolling method for copper alloy tubes |
| 12/15/2010 | CN101912879A Three-roll-type skew rolling mill of open-type stand |
| 12/15/2010 | CN101912878A Open-rack three-roller oblique rolling extender |
| 12/09/2010 | WO2010139200A1 Rolling method for shell ring and device thereof |
| 12/08/2010 | CN201664692U Double-roller skew-rolling ingot metal cold perforating, enlarging hole machine |
| 12/08/2010 | CN101905243A Seamless steel tube reducing process |
| 12/08/2010 | CN101905242A Roller-lifting proportional and synchronous hydraulic control system |
| 12/08/2010 | CN101653781B Perforation production new technique of hot rolling large-diameter steel pipe |
| 12/01/2010 | CN201659143U Feed angle dial of cone mill |
| 12/01/2010 | CN101474634B Three-roller tube-rolling machine |
| 11/24/2010 | CN201644493U Roll-over resistance skidding type mandril trolley |
| 11/24/2010 | CN201644492U Skew rolling two-roll piercer adopting welded structure |
| 11/24/2010 | CN101892443A High strength and high toughness petroleum casing pipe at steel grade with yield strength of 170-180ksi and manufacturing method thereof |
| 11/24/2010 | CN101892441A Ultrafine crystal grain semi-trailer axle tube material and processing method of axle tube |
| 11/17/2010 | CN1981948B Three-roller pipe rolling apparatus |
| 11/10/2010 | CN101318200B Precision rolling process for heavy-caliber skew rolling reeling weldless steel tube |
| 11/03/2010 | CN201618721U Grouped three-roll size reducing mill |
| 11/03/2010 | CN201618720U Three-roller straightening machine |
| 10/21/2010 | US20100263422 Lubricant for hot working and method for producing seamless steel pipe |
| 10/20/2010 | CN101862753A Production process of stainless steel seamless super thick pipe |
| 10/13/2010 | CN101612700B Method for preparing seamless steel tubes made of martensite precipitation hardening stainless steel |
| 10/06/2010 | CN101850364A Three-roller planetary rolling method for rolling brass tube |
| 10/06/2010 | CN101850363A Technology and device for forming hollow anchor stock in one step through reduction (phi 40-phi 50) hot rolling |
| 09/29/2010 | EP2233604A1 Tubular sputter target and method for its production |
| 09/29/2010 | CN101844153A Metal bar material and pipe material precision hot helical rolling and blanking roller and blanking method thereof |
| 09/29/2010 | CN101376136B Method for producing martensitic stainless steel seamless steel pipe |
| 09/29/2010 | CN101376134B Method for producing martensitic stainless steel seamless steel pipe |
| 09/28/2010 | CA2600580C Martensitic stainless steel seamless pipe and a manufacturing method thereof |
| 09/15/2010 | CN201579256U Grouped two-roller sizing and reducing mill |
| 09/10/2010 | WO2010100968A1 Plug, piercing rolling apparatus and method of manufacturing seamless tube using the same |
| 09/08/2010 | CN101823076A Packet three-roll size reducing mill |
| 09/08/2010 | CN101410196B Process for manufacturing a seamless tube |
| 09/07/2010 | US7788957 Apparatus for pipe end sizing and method for pipe end sizing |
| 09/01/2010 | CN201565475U Online guide plate replacing device of puncher |
| 09/01/2010 | CN101386037B Treatment technique of 1010 steel for bearing ring |
| 08/26/2010 | US20100212387 Method for producing a seamless steel pipe and rolling mill for performing the method |
| 08/25/2010 | CN201558846U Three-roll piercer guide plate device with locking mechanism |