B21B23/00 - CPC Classification Index

#1

20260124656

2026-05-07

BOTTOMED TUBULAR BODY PROCESSING DEVICE

#2

20260021522

2026-01-22

ROLLING APPARATUS FOR ANNULAR WORKPIECE

#3

20220008975

2022-01-13

Method for piercing titanium alloy solid billet

#4

20210231237

2021-07-29

Tubular structure reinforcing

#5

20200276625

2020-09-03

Piercing machine, and method for producing seamless metal pipe using the same

#6

20190299264

2019-10-03

Device for processing cross section of pipe

#7

20190085434

2019-03-21

METHOD FOR PRODUCING A HOT-FORMED STEEL COMPONENT, AND HOT FORMED STEEL COMPONENT

#8

20190010569

2019-01-10

Process of producing a duplex stainless steel tube

#9

20180169725

2018-06-21

Method and apparatus for making seamless pipe

#10

20180023163

2018-01-25

High-strength welded steel pipe for airbag inflator and method for manufacturing the same

#11

20170362678

2017-12-21

High strength thick-walled electric-resistance-welded steel pipe for deep-well conductor casing, method for manufacturing the same, and high-strength thick-walled conductor casing for deep wells

#12

20170356071

2017-12-14

Electric resistance welded steel pipe and manufacturing method therefor

#13

20170349965

2017-12-07

Method of quenching steel pipe, apparatus for quenching steel pipe, method of manufacturing steel pipe and facility for manufacturing steel pipe

#14

20170309399

2017-10-26

Method of roll-forming with gap fillers for solenoid used for transmission

#15

20170283897

2017-10-05

METHOD AND SYSTEM FOR THE PRODUCTION OF A SEAMLESS HOT-ROLLED TUBE AS WELL AS A ROLLED CENTRIFUGALLY CAST TUBE AND USE OF A HOLLOW BLOCK PRODUCED BY MEANS OF CENTRIFUGAL CASTING

#16

20170216896

2017-08-03

Method for producing hot-rolled seamless pipes having thickened ends

#17

20170021401

2017-01-26

Method for Forming an End Part of a Tube, Respective Device for Performing the Method, Rolling Body, and Flange on an End Part of a Tube Formed with the Method

#18

20170014882

2017-01-19

ALPHA + BETA TITANIUM ALLOY WELDED PIPE EXCELLENT IN STRENGTH AND RIGIDITY IN PIPE LONGITUDINAL DIRECTION AND METHOD FOR PRODUCING THE SAME

#19

20160376677

2016-12-29

Method for producing a tempered seamlessly hot-fabricated steel pipe

#20

20160318082

2016-11-03

Method and device for producing tapering pipe sections on ground screw foundations

#21

20160265076

2016-09-15

Equipment line for manufacturing seamless steel tube or pipe and method of manufacturing high-strength stainless steel seamless tube or pipe for oil wells using the equipment line

#22

20160236249

2016-08-18

Equipment line for manufacturing heavy-walled steel products

#23

20160223110

2016-08-04

Device and method for forming pipe elements

#24

20160136704

2016-05-19

Descaling device for the interior of tubes and descaling process

#25

20160059286

2016-03-03

Spinning method and spinning apparatus

#26

20160059285

2016-03-03

Integrated transverse rolling mill for seamless tubes

#27

20150314348

2015-11-05

Apparatus for Working Tubes, Bars, Sections and Similar Blanks, Comprising a Plurality of Machines Arranged in Line

#28

20150251268

2015-09-10

Electric resistance welded steel pipe or steel tube having excellent HIC resistance and low-temperature toughness in electric resistance welded part, and method for manufacturing the same

#29

20150196942

2015-07-16

Deoxidation of cross-rolled hollow blocks

#30

20150191670

2015-07-09

Powder lubricant composition and method for manufacturing seamless steel pipe

#31

20150101381

2015-04-16

Method of cold rolling a seamless pipe

#32

20150096344

2015-04-09

Method of forming integrated drive shaft and yoke

#33

20150013820

2015-01-15

METHOD FOR ROLLING/DRAWING NICKEL-FREE HIGH-NITROGEN STAINLESS STEEL MATERIAL, THIN SEAMLESS TUBE OF NICKEL-FREE HIGH-NITROGEN STAINLESS STEEL, AND METHOD OF MANUFACTURING THE SAME

#34

20150000363

2015-01-01

Rolling stand with skewed working rolls and a roll preloading device

#35

20140261840

2014-09-18

Manufacture method of tubular member and tubular member manufactured by the same

#36

20140260502

2014-09-18

Stent crimping tool insert, system, and method

#37

20140260480

2014-09-18

Methods for manufacture of pipe element having shoulder, groove and bead

#38

20140250965

2014-09-11

Method of producing seamless metal pipe

#39

20140245806

2014-09-04

Method of producing seamless metal pipe

#40

20140210206

2014-07-31

Pipe element having shoulder, groove and bead

#41

20130333433

2013-12-19

Method for producing seamless hot-rolled pipes in continuous pipe rolling mills

#42

20130327110

2013-12-12

METHOD FOR STRAIGHTENING

#43

20130283879

2013-10-31

Method for manufacturing Ni base alloy pipe stock

#44

20130264123

2013-10-10

Methods of manufacturing steel tubes for drilling rods with improved mechanical properties, and rods made by the same

#45

20130263436

2013-10-10

Production method of seamless tube using round bar made of high Cr-high Ni alloy

#46

20130197686

2013-08-01

Methods for manipulating cutting elements for earth-boring drill bits and tools

#47

20130174628

2013-07-11

Method and device for producing conical pipe sections in helical foundations

#48

20130133390

2013-05-30

Method and apparatus for making a collar to the end of a pipe

#49

20130118632

2013-05-16

Oil country tubular goods with dual phase structure and producing method thereof

#50

20130098128

2013-04-25

Process for hot-rolling metallic hollow bodies and corresponding hot-rolling mill

#51

20130091916

2013-04-18

Method for producing seamless pipes

#52

20130004787

2013-01-03

SEAMLESS STEEL PIPE FOR STEAM INJECTION AND METHOD FOR MANUFACTURING THE SAME

#53

20120312062

2012-12-13

Device and method for rolling of pipe blanks

#54

20120285215

2012-11-15

Device and method to shape worked pieces

#55

20120272706

2012-11-01

Winding device, roller system having a winding device and related method

#56

20120174646

2012-07-12

Retract mandrel mill and method for rolling tube blank

#57

20120139236

2012-06-07

Pipe element having shoulder, groove and bead and methods and apparatus for manufacture thereof

#58

20120137745

2012-06-07

Tube rolling plant

#59

20120125068

2012-05-24

Method for producing seamless tubes by means of a three-roll bar rolling mill

#60

20120103049

2012-05-03

Rolling process and relating longitudinal, multi-stand rolling mill of continuous, restrained type for hollow bodies

#61

20120017662

2012-01-26

METHOD FOR PRODUCING SEAMLESS STEEL TUBE AND PRODUCTION FACILITY THEREFOR

#62

20110271731

2011-11-10

METHOD FOR PRODUCING SEAMLESS METALLIC TUBE BY COLD ROLLING

#63

20110239720

2011-10-06

Production method of seamless pipe or tube, and oxidizing gas supply unit

#64

20110056263

2011-03-10

Method for producing seamless pipe and method for determining length of billet for use in producing seamless pipe

#65

20110023570

2011-02-03

Method for Producing High-Alloy Seamless Steel Pipe

#66

20100300167

2010-12-02

Foreign pipe or tube determining method

#67

20100269868

2010-10-28

MANDREL BAR CLEANING FACILITY

#68

20100236670

2010-09-23

HEAVY WALL SEAMLESS STEEL PIPE FOR LINE PIPE AND A MANUFACTURING METHOD THEREOF

#69

20100212387

2010-08-26

Method of and rolling mill for making seamless steel pipe

#70

20100204824

2010-08-12

Methods, systems, and devices for manipulating cutting elements for earth-boring drill bits and tools

#71

20100175450

2010-07-15

Method of producing seamless metal tube and punch for use therein

#72

20100107714

2010-05-06

Pusher device for piercing and rolling and method of manufacturing seamless pipe or tube using the same

#73

20100107713

2010-05-06

METHOD AND DEVICE FOR ROLLING A ROLLING STOCK IN A ROLLING MILL WITH A CROSS-ROLLING MILL

#74

20100011831

2010-01-21

Piercing mill

#75

20090293569

2009-12-03

Method for applying lubricant onto mandrel bar, method for controlling thickness of lubricant film on mandrel bar, and method for manufacturing seamless steel pipe

#76

20090218014

2009-09-03

Method for producing duplex stainless steel seamless pipe

#77

20090084151

2009-04-02

Process for producing seamless stainless steel pipe

#78

20090071221

2009-03-19

Mandrel bar for high-alloy rolling, method for surface treating a mandrel bar, method for producing mandrel bar, and method for operating seamless pipe mill

#79

20090064749

2009-03-12

Process for producing stainless steel pipe

#80

20090044883

2009-02-19

Method of making a seamless hot-finished steel pipe, and device for carrying out the method

#81

20090038359

2009-02-12

Method of manufacturing seamless pipe or tube

#82

20090038358

2009-02-12

Method of manufacturing seamless pipe and tube

#83

20090033007

2009-02-05

Martensitic stainless steel tube and manufacturing method thereof

#84

20090000709

2009-01-01

Method for producing high chromium seamless pipe or tube

#85

20080113534

2008-05-15

Hollow Bar Manufacturing Process

#86

20080083254

2008-04-10

Manufacturing method and cleaning equipment for seamless tube

#87

20080047635

2008-02-28

Heavy wall seamless steel pipe for line pipe and a manufacturing method thereof

#88

20080011037

2008-01-17

Process for manufacturing a seamless tube

#89

20070251611

2007-11-01

Method for producing martensitic stainless steel tubes

#90

20070181225

2007-08-09

Ni base alloy pipe stock and method for manufacturing the same

#91

20070175547

2007-08-02

Fe-Ni alloy pipe stock and method for manufacturing the same

#92

20070062238

2007-03-22

Method for manufacturing seamless steel pipe or tube

#93

20070050965

2007-03-08

Hollow bar manufacturing process

#94

20070022796

2007-02-01

Method for manufacturing seamless pipes or tubes

#95

20070020137

2007-01-25

Nickel-base alloy and articles made therefrom

#96

20060169375

2006-08-03

Method for manufacturing martensitic stainless steel tube

#97

20050266927

2005-12-01

Seamless steel tube for drive shaft and method for manufacturing the same

#98

13227020

2015-01-20

Variable diameter nozzle, joint and rod forming using cam rollers