JPS54126655A - Treating method for groove corrosion resistance of electric welded zone in electric welded steel pipe - Google Patents
Treating method for groove corrosion resistance of electric welded zone in electric welded steel pipeInfo
- Publication number
- JPS54126655A JPS54126655A JP3455678A JP3455678A JPS54126655A JP S54126655 A JPS54126655 A JP S54126655A JP 3455678 A JP3455678 A JP 3455678A JP 3455678 A JP3455678 A JP 3455678A JP S54126655 A JPS54126655 A JP S54126655A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- electric welded
- electric
- zone
- corrosion resistance
- 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
Landscapes
- Heat Treatment Of Articles (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
PURPOSE: To improve the groove corrosion resistance, and to make good the surface characteristics, by heating to melt into suitable depth the electric welded zone and its neighborhood from inside and/or outside of the pipe, after the electric welding is finished, on purpose to treat the electric welded zone for improving the groove corrosion resistance.
CONSTITUTION: The steel strip R is fed to the electric welded pipe manufacturing apparatus 2, and is gradually formed into the pipe form by the forming rolls and idlers of the apparatus 2 from the first roll 21 to the sixth roll 22 of the final stage, etc., and an unifinished pipe Q0 is delivered from the sixth roll 22. The high frequency welder 23 heats the joint portion of this unfinished pipe Q0 for the purpose of welding, and the pipe Q0 is passed through the squeeze roll 24; hereby, the joint portion is welded and the seam welded pipe Q1 is obtained. The excess weld metal of the outer surface of the electric welded steel pipe P is ground by the bead grinder; and then, TIG welder is actuated to generate the arc across the electric welded steel pipe P and the torch 3a; hereby, the electric welded zone P1 and its neighborhood are heated to melt into a suitable depth. After that, this remolten zone is left for natural cooling.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3455678A JPS54126655A (en) | 1978-03-24 | 1978-03-24 | Treating method for groove corrosion resistance of electric welded zone in electric welded steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3455678A JPS54126655A (en) | 1978-03-24 | 1978-03-24 | Treating method for groove corrosion resistance of electric welded zone in electric welded steel pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54126655A true JPS54126655A (en) | 1979-10-02 |
| JPS5743133B2 JPS5743133B2 (en) | 1982-09-13 |
Family
ID=12417577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3455678A Granted JPS54126655A (en) | 1978-03-24 | 1978-03-24 | Treating method for groove corrosion resistance of electric welded zone in electric welded steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54126655A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010002269A1 (en) * | 2008-06-30 | 2010-01-07 | Efd Induction As | In-line weld seam heat treatment method and apparatus with internal selective heating of the welded joint |
-
1978
- 1978-03-24 JP JP3455678A patent/JPS54126655A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010002269A1 (en) * | 2008-06-30 | 2010-01-07 | Efd Induction As | In-line weld seam heat treatment method and apparatus with internal selective heating of the welded joint |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5743133B2 (en) | 1982-09-13 |
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