JPS5775296A - Method for improving residual stress of welded joint part of pipe - Google Patents

Method for improving residual stress of welded joint part of pipe

Info

Publication number
JPS5775296A
JPS5775296A JP15082180A JP15082180A JPS5775296A JP S5775296 A JPS5775296 A JP S5775296A JP 15082180 A JP15082180 A JP 15082180A JP 15082180 A JP15082180 A JP 15082180A JP S5775296 A JPS5775296 A JP S5775296A
Authority
JP
Japan
Prior art keywords
water
joint part
plugs
welded joint
cooling
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
Application number
JP15082180A
Other languages
Japanese (ja)
Other versions
JPH0144437B2 (en
Inventor
Risuke Nayama
Yoshihiro Tada
Koji Hamada
Iwao Nakatani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP15082180A priority Critical patent/JPS5775296A/en
Publication of JPS5775296A publication Critical patent/JPS5775296A/en
Publication of JPH0144437B2 publication Critical patent/JPH0144437B2/ja
Granted legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Landscapes

  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

PURPOSE: To turn the residual tensile stress of the inside surface of a joint to compressive stress and prevent stress corrosion cracking by solidifying and expanding the material sealed in the inside by cooling means disposed in the welded joint part or on the outer circumference of both sides then melting the same.
CONSTITUTION: A material which turns solid and expands when cooled, for example, water 4, is packed in piping. Next, cooling means 5, 5' are disposed on the outer side on both sides of a welded joint part 3, the water 4 is cooled. Then, the water near the inside circumference of the means 5, 5' is cooled to ice and ice plugs 6, 6' are formed. Further when the cooling by the means 5, 5' is continued, the plugs 6, 6' grow gradually so that the internal pressure of the water 4 confined by the plugs 6, 6' is boosted. The pipe diameter is expanded by the internal pressure thereof, whereby a plastic deformation is caused in the joint part 3 and near the same. When the cooling is ceased after the initiation of the plastic deformation and the plugs 6, 6' are melted to release the internal pressure of the water 4, the residual tensile stress in the part 3 turns to compressive stress.
COPYRIGHT: (C)1982,JPO&Japio
JP15082180A 1980-10-29 1980-10-29 Method for improving residual stress of welded joint part of pipe Granted JPS5775296A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15082180A JPS5775296A (en) 1980-10-29 1980-10-29 Method for improving residual stress of welded joint part of pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15082180A JPS5775296A (en) 1980-10-29 1980-10-29 Method for improving residual stress of welded joint part of pipe

Publications (2)

Publication Number Publication Date
JPS5775296A true JPS5775296A (en) 1982-05-11
JPH0144437B2 JPH0144437B2 (en) 1989-09-27

Family

ID=15505138

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15082180A Granted JPS5775296A (en) 1980-10-29 1980-10-29 Method for improving residual stress of welded joint part of pipe

Country Status (1)

Country Link
JP (1) JPS5775296A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1110637A2 (en) * 1999-12-24 2001-06-27 Salzgitter AG Method for producing a component and component
US7565812B2 (en) 2005-05-31 2009-07-28 Hitachi-Ge Nuclear Energy, Ltd. Method for improving residual stress in pipe and apparatus
JP2009243545A (en) * 2008-03-31 2009-10-22 Hitachi-Ge Nuclear Energy Ltd Method for restricting growth of crack in piping
JP2010076000A (en) * 2009-11-30 2010-04-08 Hitachi-Ge Nuclear Energy Ltd Residual stress improving device for piping
JP2011131252A (en) * 2009-12-25 2011-07-07 Hitachi-Ge Nuclear Energy Ltd Method for improving residual stress of piping
CN104087730A (en) * 2014-07-16 2014-10-08 甘肃蓝科石化高新装备股份有限公司 Method for strain strengthening of austenitic stainless steel low-temperature pressure vessel

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014069207A (en) 2012-09-28 2014-04-21 Mitsubishi Heavy Ind Ltd Apparatus and method for expanding pipe diameter

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1110637A2 (en) * 1999-12-24 2001-06-27 Salzgitter AG Method for producing a component and component
EP1110637A3 (en) * 1999-12-24 2002-01-16 Salzgitter AG Method for producing a component and component
US7565812B2 (en) 2005-05-31 2009-07-28 Hitachi-Ge Nuclear Energy, Ltd. Method for improving residual stress in pipe and apparatus
US7866166B2 (en) 2005-05-31 2011-01-11 Hitachi-Ge Nuclear Energy, Ltd. Method for improving residual stress in pipe and apparatus
JP2009243545A (en) * 2008-03-31 2009-10-22 Hitachi-Ge Nuclear Energy Ltd Method for restricting growth of crack in piping
JP2010076000A (en) * 2009-11-30 2010-04-08 Hitachi-Ge Nuclear Energy Ltd Residual stress improving device for piping
JP2011131252A (en) * 2009-12-25 2011-07-07 Hitachi-Ge Nuclear Energy Ltd Method for improving residual stress of piping
CN104087730A (en) * 2014-07-16 2014-10-08 甘肃蓝科石化高新装备股份有限公司 Method for strain strengthening of austenitic stainless steel low-temperature pressure vessel

Also Published As

Publication number Publication date
JPH0144437B2 (en) 1989-09-27

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