CA2706360A1 - Method and apparatus for relieving residual stress in welded pipe joints - Google Patents
Method and apparatus for relieving residual stress in welded pipe joints Download PDFInfo
- Publication number
- CA2706360A1 CA2706360A1 CA2706360A CA2706360A CA2706360A1 CA 2706360 A1 CA2706360 A1 CA 2706360A1 CA 2706360 A CA2706360 A CA 2706360A CA 2706360 A CA2706360 A CA 2706360A CA 2706360 A1 CA2706360 A1 CA 2706360A1
- Authority
- CA
- Canada
- Prior art keywords
- pipe
- butt
- welded part
- watertight space
- welded
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow from or in pipes or hoses
- F16L55/103—Means for stopping flow from or in pipes or hoses by temporarily freezing liquid sections in the pipe
Abstract
Residual stress in a butt-welded part of a pipe is improved where the butt-welded part is welded by abutting pipes to be welded. An outer surface of the pipe is cooled at each side of the butt-welded part to form ice plugs defining a watertight space therebetween inside the pipe. An outer surface of the pipe is cooled defining the watertight space to increase a water pressure in the watertight space to expand the butt-welded part of the watertight space in the pipe. A strain on the outer surface of the pipe is measured with a strain gauge at the butt-welded part to confirm that the outer surface of the pipe at the butt-welded part starts to plastically deform. In order to cool the outer surface of the pipe defining the watertight space, the above process is stopped.
Claims (5)
1. A method for improving residual stress in a butt-welded part of a pipe, wherein the butt-welded part is welded by abutting pipes to be welded, comprising:
cooling an outer surface of the pipe at each side of the butt-welded part to form ice plugs defining a watertight space therebetween inside the pipe;
then, cooling an outer surface of the pipe defining the watertight space to increase a water pressure in the watertight space to expand the butt-welded part of the watertight space in the pipe;
measuring, with a strain gauge, a strain on the outer surface of the pipe at the butt-welded part to confirm that the outer surface of the pipe at the butt-welded part starts to plastically deform; and then, stopping to cool the outer surface of the pipe defining the watertight space.
cooling an outer surface of the pipe at each side of the butt-welded part to form ice plugs defining a watertight space therebetween inside the pipe;
then, cooling an outer surface of the pipe defining the watertight space to increase a water pressure in the watertight space to expand the butt-welded part of the watertight space in the pipe;
measuring, with a strain gauge, a strain on the outer surface of the pipe at the butt-welded part to confirm that the outer surface of the pipe at the butt-welded part starts to plastically deform; and then, stopping to cool the outer surface of the pipe defining the watertight space.
2. The method according to claim 1, wherein the step of cooling the outer surface of the pipe defining the watertight space includes cooling at each side of the butt-welded part.
3. The method according to claim 1 or 2, wherein the step of stopping to cool the outer surface of the pipe defining the watertight space includes stopping to cool when the measured strain of the outer surface of the pipe at the butt-welded part becomes about twice of a strain with which plastic deformation of a material of the pipe starts.
4. The method according to claim 1 or 2, wherein the pipe is made of an austenitic stainless steel.
5. An apparatus for improving residual stress at a butt-welded part of a pipe, wherein the butt-welded part is welded by abutting pipes to be welded, comprising:
refrigerant containers for forming the ice plugs, placed on an outer surface of the pipe at each side of the butt-welded part to form ice plugs defining a watertight space therebetween inside the pipe; and a refrigerant container for expanding the pipe, placed on the outer surface of the pipe defining the watertight space after forming the ice plug to increase the water pressure in the watertight space to expand the butt-welded part of the watertight space in the pipe; and a strain gauge placed on an outer surface of the pipe at the butt-welded part, for confirming start of plastic deformation of the outer surface of the pipe at the butt-welded part.
refrigerant containers for forming the ice plugs, placed on an outer surface of the pipe at each side of the butt-welded part to form ice plugs defining a watertight space therebetween inside the pipe; and a refrigerant container for expanding the pipe, placed on the outer surface of the pipe defining the watertight space after forming the ice plug to increase the water pressure in the watertight space to expand the butt-welded part of the watertight space in the pipe; and a strain gauge placed on an outer surface of the pipe at the butt-welded part, for confirming start of plastic deformation of the outer surface of the pipe at the butt-welded part.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005-158290 | 2005-05-31 | ||
| JP2005158290A JP4448791B2 (en) | 2005-05-31 | 2005-05-31 | Method and apparatus for improving residual stress in piping |
| CA2548877A CA2548877C (en) | 2005-05-31 | 2006-05-29 | Method and apparatus for relieving tensile residual stress in welded pipe joints |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2548877A Division CA2548877C (en) | 2005-05-31 | 2006-05-29 | Method and apparatus for relieving tensile residual stress in welded pipe joints |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2706360A1 true CA2706360A1 (en) | 2006-11-30 |
| CA2706360C CA2706360C (en) | 2012-12-04 |
Family
ID=37480438
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2548877A Active CA2548877C (en) | 2005-05-31 | 2006-05-29 | Method and apparatus for relieving tensile residual stress in welded pipe joints |
| CA2706360A Active CA2706360C (en) | 2005-05-31 | 2006-05-29 | Method and apparatus for relieving residual stress in welded pipe joints |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2548877A Active CA2548877C (en) | 2005-05-31 | 2006-05-29 | Method and apparatus for relieving tensile residual stress in welded pipe joints |
Country Status (3)
| Country | Link |
|---|---|
| US (3) | US7565812B2 (en) |
| JP (1) | JP4448791B2 (en) |
| CA (2) | CA2548877C (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4448791B2 (en) * | 2005-05-31 | 2010-04-14 | 日立Ｇｅニュークリア・エナジー株式会社 | Method and apparatus for improving residual stress in piping |
| JP2008238190A (en) * | 2007-03-26 | 2008-10-09 | Hitachi-Ge Nuclear Energy Ltd | Method for improving residual stress of piping |
| JP4448873B2 (en) * | 2007-08-29 | 2010-04-14 | 日立Ｇｅニュークリア・エナジー株式会社 | Residual stress improvement method for small diameter piping |
| JP5237750B2 (en) * | 2008-10-17 | 2013-07-17 | 日立Ｇｅニュークリア・エナジー株式会社 | How to improve residual stress in piping |
| JP5367558B2 (en) * | 2009-12-25 | 2013-12-11 | 日立Ｇｅニュークリア・エナジー株式会社 | How to improve residual stress in piping |
| JP2014069207A (en) | 2012-09-28 | 2014-04-21 | Mitsubishi Heavy Ind Ltd | Apparatus and method for expanding pipe diameter |
| CN104785932B (en) * | 2015-05-02 | 2017-02-01 | 汪浩 | Pipeline welding seam stress relief device |
| CN104785933B (en) * | 2015-05-02 | 2017-02-01 | 汪浩 | Large-pipe-diameter pipeline weld seam stress eliminating device |
| CN107671459A (en) * | 2017-10-10 | 2018-02-09 | 汉能机器人自动化（丹阳）有限公司 | Single-station automobile buffer beam welding system |
| CN109351838A (en) * | 2018-12-21 | 2019-02-19 | 房县诚信汽配有限责任公司 | A kind of automobile pipe part internal high pressure forming technique |
| CN110542504A (en) * | 2019-09-24 | 2019-12-06 | 中国工程物理研究院化工材料研究所 | Explosive part residual stress testing system and method based on hydraulic fracturing method |
| CN112170996A (en) * | 2020-09-01 | 2021-01-05 | 合肥通用机械研究院有限公司 | Welding method for butt joint of T2 red copper and S32168 stainless steel tube |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3695301A (en) * | 1971-06-07 | 1972-10-03 | Halliburton Co | Apparatus and method for pipeline testing |
| US3926006A (en) * | 1973-04-09 | 1975-12-16 | Cap Con International Inc | Method and apparatus of freezing a plug in a pipe for pressure testing |
| US4220012A (en) * | 1976-09-13 | 1980-09-02 | Brister Beryle D | Apparatus for freezing a slug of liquid in a section of a large diameter fluid transmission line |
| US4267699A (en) * | 1979-02-21 | 1981-05-19 | Bahrenburg Harry H | Freeze isolation seal |
| US4309875A (en) * | 1979-05-14 | 1982-01-12 | Gerald M. D'Agostino | Pipe freezer or the like |
| JPS5775296A (en) | 1980-10-29 | 1982-05-11 | Mitsubishi Heavy Ind Ltd | Method for improving residual stress of welded joint part of pipe |
| JPS57175094A (en) | 1981-04-20 | 1982-10-27 | Mitsubishi Heavy Ind Ltd | Improving method for residual stress in welded joint part of pipes |
| JPS57177924A (en) | 1981-04-28 | 1982-11-01 | Mitsubishi Heavy Ind Ltd | Improving method for residual stress on both surfaces |
| US4433556A (en) * | 1981-10-19 | 1984-02-28 | Temp-Control Corporation | Pipe freezing device |
| US4416118A (en) * | 1981-12-21 | 1983-11-22 | Brister Beryle D | Method and apparatus for controlling the formation of a temporary plug in a fluid transmission line |
| US5018360A (en) * | 1990-06-14 | 1991-05-28 | Jones Jeffrey K | Frosted sculpture method and apparatus |
| US5680770A (en) * | 1996-11-04 | 1997-10-28 | Freeze Service, Inc. | Pipe freezing apparatus |
| JP4176197B2 (en) | 1998-08-12 | 2008-11-05 | 関西電力株式会社 | A method to improve the internal residual stress state of small diameter pipes |
| JP3746651B2 (en) | 1999-11-26 | 2006-02-15 | 三菱重工業株式会社 | Method and apparatus for reducing welding residual stress |
| WO2001042865A1 (en) * | 1999-12-10 | 2001-06-14 | Gentech Investment Group Ag. | Man-machine interface having relative position sensor |
| AUPQ788000A0 (en) * | 2000-05-30 | 2000-06-22 | Structural Monitoring Systems Ltd | Apparatus and method for measurement of the permeability of materials |
| JP4300085B2 (en) | 2003-09-26 | 2009-07-22 | 日立Ｇｅニュークリア・エナジー株式会社 | How to improve residual stress in piping |
| JP4448791B2 (en) * | 2005-05-31 | 2010-04-14 | 日立Ｇｅニュークリア・エナジー株式会社 | Method and apparatus for improving residual stress in piping |
| JP5367558B2 (en) * | 2009-12-25 | 2013-12-11 | 日立Ｇｅニュークリア・エナジー株式会社 | How to improve residual stress in piping |
-
2005
- 2005-05-31 JP JP2005158290A patent/JP4448791B2/en active Active
-
2006
- 2006-05-29 CA CA2548877A patent/CA2548877C/en active Active
- 2006-05-29 CA CA2706360A patent/CA2706360C/en active Active
- 2006-05-30 US US11/442,282 patent/US7565812B2/en active Active
-
2009
- 2009-06-22 US US12/488,666 patent/US7866166B2/en active Active
-
2010
- 2010-12-06 US US12/960,677 patent/US20110073219A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| US20090255275A1 (en) | 2009-10-15 |
| CA2706360C (en) | 2012-12-04 |
| CA2548877A1 (en) | 2006-11-30 |
| US20110073219A1 (en) | 2011-03-31 |
| JP2006334596A (en) | 2006-12-14 |
| US7866166B2 (en) | 2011-01-11 |
| CA2548877C (en) | 2010-09-07 |
| JP4448791B2 (en) | 2010-04-14 |
| US20060277929A1 (en) | 2006-12-14 |
| US7565812B2 (en) | 2009-07-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2706360A1 (en) | Method and apparatus for relieving residual stress in welded pipe joints | |
| CN107654748B (en) | Plastic pipe socket type metal pipe with port reinforced ring lining and manufacturing method | |
| CN101722396A (en) | Process for repairing inner surface damages in outer cylinder and inner cylinder of mine hydraulic support column | |
| CN105013908B (en) | For the assembling die and manufacturing process of the shaping of flange pipe nipple | |
| CN104625648A (en) | Technological method for machining square and rectangular pipes | |
| JP5367558B2 (en) | How to improve residual stress in piping | |
| JP5237750B2 (en) | How to improve residual stress in piping | |
| CN105290177A (en) | Hot bending forming technology of large-caliber thick-walled pipe filled with sand cores through heat in supplementing manner | |
| CN203948802U (en) | A kind of composite bimetal pipe | |
| CN111043408A (en) | Novel stainless steel seamless steel pipe | |
| JP2008238190A (en) | Method for improving residual stress of piping | |
| JP6367681B2 (en) | Piping residual stress improvement method, antifreeze liquid supply method between ice plugs, and piping residual stress improvement device | |
| JP2003340518A (en) | Manufacturing method of uoe steel pipe having good crush strength | |
| JPS5775296A (en) | Method for improving residual stress of welded joint part of pipe | |
| US20220168795A1 (en) | Metal pipe and method for manufacturing metal pipe | |
| CN201866431U (en) | Concentric reducer | |
| JP3872742B2 (en) | UOE steel pipe manufacturing method with excellent formability | |
| RU2648343C1 (en) | METHOD TO MANUFACTURE CYLINDERS OPERATING UNDER PRESSURE UP TO 250 kgf/cm2 | |
| KR20080037354A (en) | Manufacturing method for charging gas container | |
| RU2007114162A (en) | METHOD FOR PRODUCING PUMP AND COMPRESSOR PIPES | |
| CN216441471U (en) | Opening top for expansion forming steel butt welding tee joint | |
| CN203453458U (en) | Pressure vessel assembly structure | |
| RU2006105292A (en) | METHOD FOR PRODUCING STEEL THICK-SHEET Billet from PIPELINES DISMANTED WHEN RENOVATING | |
| GB2547688A (en) | A method for one-shot solid-state welding of pipelines | |
| Hall et al. | Manufacture and Qualification of Small Diameter/Thickwall Reelable DSAWL Linepipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |