EP2170540A1 - Method for the production of hot-finished seamless pipes having optimized fatigue properties in the welded state - Google Patents
Method for the production of hot-finished seamless pipes having optimized fatigue properties in the welded stateInfo
- Publication number
- EP2170540A1 EP2170540A1 EP08773277A EP08773277A EP2170540A1 EP 2170540 A1 EP2170540 A1 EP 2170540A1 EP 08773277 A EP08773277 A EP 08773277A EP 08773277 A EP08773277 A EP 08773277A EP 2170540 A1 EP2170540 A1 EP 2170540A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pipe
- tube
- hot
- region
- produced
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K21/00—Making hollow articles not covered by a single preceding sub-group
- B21K21/12—Shaping end portions of hollow articles
Definitions
- the invention relates to a method for producing hot-finished seamless tubes with optimized fatigue properties in the welded state according to the preamble of claim 1. Furthermore, the invention relates to a tube produced by this method.
- Pipes produced by these methods are used, for example, in the oil or gas production technique, wherein the individual pipe sections are welded by a seam to a continuous strand.
- the welded joint can cost and efficiently, for. B. by automated welding, and a high fatigue strength of the welded joint can be ensured. Even the most trouble-free media flow through the pipeline is also only guaranteed.
- the hot rolled seamless tube tolerances can not be safely maintained within a narrow frame required for efficient production of the joint weld. In addition, slight wall thickness fluctuations and ovalities in the pipe diameter occur.
- a disadvantage of this procedure is that an elaborate logistics for storage and transport of the tubes is required so that for the most trouble-free production process always the matching geometry from each other pipes are available.
- Another disadvantage is the inflexibility in the production process in case of disturbances, eg. For example, when a pipe to be welded to a conduit pipe end is not available with the proper geometry.
- the object of the invention is therefore to provide a method for producing hot-rolled seamless tubes, are produced with the tube ends of uniform and exact geometry, which allows efficient welding without a prior measurement and targeted allocation of pipe ends and at the same time a high fatigue strength of the welded joint is reached.
- a method is used to solve this problem, which is characterized in that in a first step at the pipe end in a region greater wall thickness is generated than the rest of the tubular body, wherein the outer diameter increases and / or reduces the inner diameter and in a second step in this area produced by mechanical processing of the required pipe cross-section and the transition from machined to unprocessed portion of the pipe with low surface roughness and almost no scoring flow is generated and the residual wall thickness remaining in the processing area is within the required tolerances.
- the pipe ends are now produced with a reproducible corresponding to the customer requirements geometry that allows welding together without prior measurement and assignment.
- the logistic effort for storage and transport of the tubes is minimized, which leads to significant cost savings.
- the wall thickening is chosen to be so large that the dimensional deviations due to the tube tolerances, in particular with regard to the roundness or ovality, can be almost completely compensated by the subsequent mechanical processing without falling below the nominal wall thickness.
- the wall thickening may also be larger or smaller and extend over shorter or longer sections.
- the wall thickening and its longitudinal extent should be limited to a necessary for the machining both for manufacturing reasons and for cost reasons.
- the mechanical processing of the wall thickening can be done for example by unscrewing, with a very low ovality can also be achieved with very small diameter tolerances and very low surface roughness.
- a centering ring projecting into the machined areas of the two pipe ends can be used prior to the welding of the tube ends in order to ensure optimum alignment of the tube ends for automated welding.
- the wall thickening is produced in a first advantageous variant of the method by upsetting, in particular by hot upsetting of the pipe end.
- the upsetting process is advantageously carried out so that the transitions to the tubular body generated during upsetting on the outer and inner circumference are arranged offset relative to the tube longitudinal axis.
- Extensive investigations have shown that this staggered arrangement of the transitions in the tube longitudinal axis as well as the positioning of the radii in different tube cross-sectional planes during mechanical processing have a positive effect on the fatigue strength of the connection in the operating state.
- transitions are advantageously provided in the mechanical processing of the wall thickening with the largest possible radius or radii combinations. These ensure by their location in different cross-sectional planes adhering to a predetermined minimum wall thickness and lead to a possible fluid and notch-free transition to the non-thickened region of the tube. This advantageously ensures a low stress concentration factor in the transition zone. According to a further advantageous embodiment of the invention, it is also possible to realize the wall thickening of the pipe end by a build-up welding or by sintering and then to work mechanically.
- FIG. 1 shows a wall thickening produced by upsetting at a pipe end
- FIG. 2 shows a pipe end formation according to the invention in the machined state.
- FIG. 1 is a fragmentary longitudinal sectional view of a pipe produced according to the invention with a wall thickening for the outside and inside of the pipe at the pipe end after the upsetting.
- the tube 1 has in the end region a wall thickening 3 produced in a hot forming step, which merges with a transition region 4, 4 'into the starting cross section 2 of the tube 1.
- the wall thickening 3 is designed in this example so that the outer diameter of the tube 1 is increased and the inner diameter is reduced.
- the upsetting process is carried out in such a way that the transition region 4 produced during upsetting on the outer circumference and the transition region 4 'produced on the inner circumference are offset with respect to the tube longitudinal axis relative to the tube longitudinal axis.
- the transition region 4 produced by the compression process has on the outer circumference of the tube 1 paragraphs 5 and 6 and the transition region 4 1 on the inner circumference paragraphs 7 and 8.
- FIG. 2 shows the finished state of the end region of the tube 1 produced by mechanical processing.
- the finished contour of the mechanically processed tube 1 has in the originally thickened end region of the tube 1 an outer diameter which corresponds to the original diameter of the tube 1.
- the transition region 4 is provided with a large radius 9, which ensures a high degree of notch freedom through a flowing, paragraph-free transition together with a very low surface roughness in the machined area.
- the inner circumference of the thickened tube end is not processed to the original inner diameter, but there remains a small wall thickening 11, starting from the transition region 4 'also with a large radius 10th is provided, which merges fluently and paragraph-free in the output cross section 2 of the tube 1.
- the radii 9 and 10 are positioned in different tube cross-sectional planes, which has a positive effect on the fatigue strength of the connection in the operating state.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Heat Treatment Of Steel (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007034895A DE102007034895A1 (en) | 2007-07-24 | 2007-07-24 | Method of producing hot-finished seamless tubes with optimized fatigue properties in the welded state |
PCT/DE2008/001064 WO2009012744A1 (en) | 2007-07-24 | 2008-06-26 | Method for the production of hot-finished seamless pipes having optimized fatigue properties in the welded state |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2170540A1 true EP2170540A1 (en) | 2010-04-07 |
EP2170540B1 EP2170540B1 (en) | 2012-08-08 |
Family
ID=39790429
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08773277A Active EP2170540B1 (en) | 2007-07-24 | 2008-06-26 | Method for the production of hot-finished seamless pipes having optimized fatigue properties in the welded state |
Country Status (14)
Country | Link |
---|---|
US (1) | US9718116B2 (en) |
EP (1) | EP2170540B1 (en) |
JP (1) | JP5165757B2 (en) |
KR (1) | KR101499631B1 (en) |
CN (1) | CN101827666B (en) |
AR (1) | AR067641A1 (en) |
AU (1) | AU2008280642B2 (en) |
BR (1) | BRPI0814347B1 (en) |
CA (1) | CA2694469C (en) |
DE (1) | DE102007034895A1 (en) |
EA (1) | EA015222B1 (en) |
MX (1) | MX2010000815A (en) |
UA (1) | UA96827C2 (en) |
WO (1) | WO2009012744A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2489729B (en) * | 2011-04-07 | 2013-09-18 | Rolls Royce Plc | Hollow shaft |
DE102014102452A1 (en) * | 2014-02-25 | 2015-08-27 | Vallourec Deutschland Gmbh | Process for the production of hot rolled, seamless tubes of transformable steel, in particular for pipelines for deep water applications and related pipes |
DE102014110980B4 (en) | 2014-08-01 | 2017-10-26 | Vallourec Deutschland Gmbh | Method for producing hot-rolled seamless tubes with thickened ends |
DE102014216674A1 (en) * | 2014-08-21 | 2016-02-25 | Schaeffler Technologies AG & Co. KG | Tubular component and method for its production |
Family Cites Families (28)
Publication number | Priority date | Publication date | Assignee | Title |
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CH202300A (en) * | 1937-12-30 | 1939-01-15 | Sulzer Ag | Welded connection on pipes. |
DE913844C (en) * | 1951-07-10 | 1954-06-21 | Mannesmann Huettenwerke A G | Device for preparing the ends of pipes to be joined together |
DE1552889A1 (en) * | 1966-05-14 | 1970-04-23 | Hertel Dr Ing Heinrich | Arrangement for upsetting thickenings at pipe ends |
FR2469962A1 (en) * | 1979-11-21 | 1981-05-29 | Vallourec | METHOD AND DEVICE FOR PRODUCING A SOLDER-FREE STEEL TUBE BY HOT ROLLING ON CHUCK |
JPS5972391A (en) * | 1982-10-15 | 1984-04-24 | 日本鋼管株式会社 | Steel pipe for oil well and production thereof |
US4579087A (en) * | 1983-12-21 | 1986-04-01 | Westinghouse Electric Corp. | Corrosion resistant steam generator and method of making same |
JPS60166137A (en) * | 1984-02-07 | 1985-08-29 | Kawasaki Steel Corp | Upsetting method of tube end part |
JPS60244437A (en) * | 1984-05-17 | 1985-12-04 | Hitachi Ltd | Formation of uneven-thickness pipe |
JPS61279328A (en) * | 1985-06-05 | 1986-12-10 | Kawasaki Steel Corp | Method and device for upset working of pipe |
JPS63149038A (en) | 1986-12-15 | 1988-06-21 | Nippon Steel Corp | Method for working steel pipe end part by outer upsetting press |
JP2727450B2 (en) * | 1987-10-06 | 1998-03-11 | 第一高周波工業株式会社 | Method for manufacturing inner and outer metal lining tubes |
US5184495A (en) * | 1991-12-03 | 1993-02-09 | Prideco, Inc. | Method of internally and externally upsetting the end of a metal tube |
US5379625A (en) * | 1993-10-20 | 1995-01-10 | Hale; John | Method and apparatus for upsetting the ends of steel pipe |
JPH07164067A (en) * | 1993-12-13 | 1995-06-27 | Sango Co Ltd | Manufacture of pipe with uneven thickness |
US5517843A (en) * | 1994-03-16 | 1996-05-21 | Shaw Industries, Ltd. | Method for making upset ends on metal pipe and resulting product |
JPH08302901A (en) * | 1995-04-28 | 1996-11-19 | Nkk Corp | Disk-shaped steel pipe having joint and manufacture thereof |
JP4248058B2 (en) * | 1998-10-20 | 2009-04-02 | 第一高周波工業株式会社 | Abrasion resistant metal tube and method of manufacturing the same |
JP3725075B2 (en) * | 2002-01-10 | 2005-12-07 | ナカジマ鋼管株式会社 | Equipment for manufacturing round steel pipes |
US7657990B2 (en) * | 2002-03-06 | 2010-02-09 | Deere & Company | Track chain link and undercarriage track roller having a metallurgically bonded coating |
RU2303497C2 (en) * | 2003-03-26 | 2007-07-27 | Сумитомо Метал Индастриз, Лтд. | Seamless tube producing method |
ITMI20031860A1 (en) | 2003-09-29 | 2005-03-30 | Tenaris Connections Ag | EQUIPMENT FOR THE AUTOMATIC MEASUREMENT OF THE EXTERNAL AND INTERNAL PROFILE OF PIPES IN CORRESPONDENCE WITH THEIR EXTREMITIES. |
JP4766587B2 (en) * | 2004-02-02 | 2011-09-07 | 第一高周波工業株式会社 | Clad pipe |
DE102004059091A1 (en) * | 2004-12-03 | 2006-06-08 | V&M Deutschland Gmbh | Production of a hot-rolled seamless pipe made from steel used in oil and gas conveying comprises forming a larger wall thickness than the remaining tubular body on the pipe ends and mechanically processing the inner periphery |
DE102005012475A1 (en) * | 2005-03-16 | 2006-09-21 | IFUTEC Ingenieurbüro für Umformtechnik GmbH | Process for producing a transition to a hollow molded part |
DE112006000619B4 (en) * | 2005-03-23 | 2014-02-13 | Bishop Innovation Ltd. | Method for producing a steering rack |
CN100372627C (en) * | 2005-06-30 | 2008-03-05 | 宝山钢铁股份有限公司 | Making process of drill pipe with internally and externally thickened end |
US7647802B2 (en) * | 2006-08-30 | 2010-01-19 | Sunspring America, Inc. | One-piece flexible tube connector and method of making the same |
US20080226396A1 (en) * | 2007-03-15 | 2008-09-18 | Tubos De Acero De Mexico S.A. | Seamless steel tube for use as a steel catenary riser in the touch down zone |
-
2007
- 2007-07-24 DE DE102007034895A patent/DE102007034895A1/en not_active Withdrawn
-
2008
- 2008-06-26 US US12/670,230 patent/US9718116B2/en active Active
- 2008-06-26 MX MX2010000815A patent/MX2010000815A/en active IP Right Grant
- 2008-06-26 KR KR1020107001560A patent/KR101499631B1/en active IP Right Grant
- 2008-06-26 JP JP2010517263A patent/JP5165757B2/en active Active
- 2008-06-26 CA CA2694469A patent/CA2694469C/en active Active
- 2008-06-26 BR BRPI0814347-1A patent/BRPI0814347B1/en active IP Right Grant
- 2008-06-26 UA UAA201002005A patent/UA96827C2/en unknown
- 2008-06-26 WO PCT/DE2008/001064 patent/WO2009012744A1/en active Application Filing
- 2008-06-26 CN CN2008801001131A patent/CN101827666B/en active Active
- 2008-06-26 EP EP08773277A patent/EP2170540B1/en active Active
- 2008-06-26 EA EA201000234A patent/EA015222B1/en not_active IP Right Cessation
- 2008-06-26 AU AU2008280642A patent/AU2008280642B2/en active Active
- 2008-07-22 AR ARP080103166A patent/AR067641A1/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO2009012744A1 * |
Also Published As
Publication number | Publication date |
---|---|
CA2694469C (en) | 2015-11-24 |
BRPI0814347B1 (en) | 2020-10-13 |
EA015222B1 (en) | 2011-06-30 |
US9718116B2 (en) | 2017-08-01 |
AU2008280642A1 (en) | 2009-01-29 |
JP2010534136A (en) | 2010-11-04 |
JP5165757B2 (en) | 2013-03-21 |
UA96827C2 (en) | 2011-12-12 |
WO2009012744A1 (en) | 2009-01-29 |
US20100326557A1 (en) | 2010-12-30 |
BRPI0814347A2 (en) | 2015-01-27 |
EP2170540B1 (en) | 2012-08-08 |
AU2008280642B2 (en) | 2014-04-10 |
KR101499631B1 (en) | 2015-03-06 |
AR067641A1 (en) | 2009-10-21 |
DE102007034895A1 (en) | 2009-01-29 |
AU2008280642A2 (en) | 2010-05-27 |
MX2010000815A (en) | 2010-03-01 |
EA201000234A1 (en) | 2010-06-30 |
CN101827666A (en) | 2010-09-08 |
CN101827666B (en) | 2012-12-26 |
CA2694469A1 (en) | 2009-01-29 |
KR20100039351A (en) | 2010-04-15 |
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