JPS5647214A - Manufacture of welded pipe of special steel - Google Patents

Manufacture of welded pipe of special steel

Info

Publication number
JPS5647214A
JPS5647214A JP12416679A JP12416679A JPS5647214A JP S5647214 A JPS5647214 A JP S5647214A JP 12416679 A JP12416679 A JP 12416679A JP 12416679 A JP12416679 A JP 12416679A JP S5647214 A JPS5647214 A JP S5647214A
Authority
JP
Japan
Prior art keywords
heating
cooling
pipe
cooling processes
residual stress
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
JP12416679A
Other languages
Japanese (ja)
Other versions
JPH02128B2 (en
Inventor
Toshiaki Tsujino
Koichi Kawatani
Junji Iwai
Keiji Minami
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.)
Nippon Steel Nisshin Co Ltd
Original Assignee
Nisshin Steel Co 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 Nisshin Steel Co Ltd filed Critical Nisshin Steel Co Ltd
Priority to JP12416679A priority Critical patent/JPS5647214A/en
Publication of JPS5647214A publication Critical patent/JPS5647214A/en
Publication of JPH02128B2 publication Critical patent/JPH02128B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Butt Welding And Welding Of Specific Article (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

PURPOSE: To reduce the manufacturing cost, and to manufacture the welded pipe of special steel with low residual stress, by arranging the pipe forming process, the heating process, and the cooling process, in the tandem style, and by heating the pipe under a tension after the sizing process.
CONSTITUTION: The pipe forming process, the heating and cooling processes are arranged in the tandem style, and the pipe is subjected to the heating and cooling processes after finishing the sizing process. Besides, the steel pipe's deformation generating at the heating and the successive cooling processes is minimized; and in order to prevent the regeneration of the residual stress at the straightening process to be applied at the following stage, the heating is applied to the steel pipe under a suitable tension. the cooling process is carried out by gradually cooling the pipe at a specified cooling rate before applying the rapid cooling. By the present method, the deformation of the steel pipe during the heating and cooling processes is prevented; for this prupose, the pinch roll is installed at the tension adjusting process behind the heat treating furncace in order to give a suitable tension. Moreover, a little bend generated during the heating and cooling processes, is straightened by the roller; hereby, the product with a low residual stress is manufactured.
COPYRIGHT: (C)1981,JPO&Japio
JP12416679A 1979-09-28 1979-09-28 Manufacture of welded pipe of special steel Granted JPS5647214A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12416679A JPS5647214A (en) 1979-09-28 1979-09-28 Manufacture of welded pipe of special steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12416679A JPS5647214A (en) 1979-09-28 1979-09-28 Manufacture of welded pipe of special steel

Publications (2)

Publication Number Publication Date
JPS5647214A true JPS5647214A (en) 1981-04-28
JPH02128B2 JPH02128B2 (en) 1990-01-05

Family

ID=14878572

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12416679A Granted JPS5647214A (en) 1979-09-28 1979-09-28 Manufacture of welded pipe of special steel

Country Status (1)

Country Link
JP (1) JPS5647214A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5941420A (en) * 1982-08-31 1984-03-07 Nisshin Steel Co Ltd Manufacture of welded steel pipe
EP1551591A4 (en) * 2001-06-29 2008-03-12 Edward J Mccrink CONTINUOUS STEEL SOLDERING TUBING IN AIR-CURABLE STEEL
US7540402B2 (en) 2001-06-29 2009-06-02 Kva, Inc. Method for controlling weld metal microstructure using localized controlled cooling of seam-welded joints
US7618503B2 (en) 2001-06-29 2009-11-17 Mccrink Edward J Method for improving the performance of seam-welded joints using post-weld heat treatment
CN102950432A (en) * 2012-11-16 2013-03-06 中国石油集团渤海石油装备制造有限公司 Q245R longitudinal submerged arc welded natural gas blow-down pipe manufacturing method
JP2015168003A (en) * 2014-03-11 2015-09-28 Ｊｆｅスチール株式会社 ERW steel pipe and manufacturing method thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04131826U (en) * 1991-05-29 1992-12-04 ミツミ電機株式会社 Cassette half detection switch

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50145356A (en) * 1974-05-14 1975-11-21
JPS50145357A (en) * 1974-05-14 1975-11-21

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50145356A (en) * 1974-05-14 1975-11-21
JPS50145357A (en) * 1974-05-14 1975-11-21

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5941420A (en) * 1982-08-31 1984-03-07 Nisshin Steel Co Ltd Manufacture of welded steel pipe
EP1551591A4 (en) * 2001-06-29 2008-03-12 Edward J Mccrink CONTINUOUS STEEL SOLDERING TUBING IN AIR-CURABLE STEEL
US7540402B2 (en) 2001-06-29 2009-06-02 Kva, Inc. Method for controlling weld metal microstructure using localized controlled cooling of seam-welded joints
US7618503B2 (en) 2001-06-29 2009-11-17 Mccrink Edward J Method for improving the performance of seam-welded joints using post-weld heat treatment
CN102950432A (en) * 2012-11-16 2013-03-06 中国石油集团渤海石油装备制造有限公司 Q245R longitudinal submerged arc welded natural gas blow-down pipe manufacturing method
JP2015168003A (en) * 2014-03-11 2015-09-28 Ｊｆｅスチール株式会社 ERW steel pipe and manufacturing method thereof

Also Published As

Publication number Publication date
JPH02128B2 (en) 1990-01-05

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