JPS54126656A - Electric welded steel pipe superior in groove corrosion resistance - Google Patents
Electric welded steel pipe superior in groove corrosion resistanceInfo
- Publication number
- JPS54126656A JPS54126656A JP3455778A JP3455778A JPS54126656A JP S54126656 A JPS54126656 A JP S54126656A JP 3455778 A JP3455778 A JP 3455778A JP 3455778 A JP3455778 A JP 3455778A JP S54126656 A JPS54126656 A JP S54126656A
- Authority
- JP
- Japan
- Prior art keywords
- portions
- steel pipe
- welded steel
- roll
- electric
- 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
Abstract
PURPOSE: To manufacture the electric welded steel pipe which is superior in the groove corrosion resistance and has a uniform structure, by forming the steel strip into a cylindrical shape, permitting the rim portions to remain at both or one of side edge portions in the direction of breadth, and by electric seam welding both side edge portions being mutually joined.
CONSTITUTION: The steel strip R is fed from the uncoiler 1 to the manufacturing apparatus 2 for the electric welded steel pipe; this steel strip R is formed into a cylindrical shape by the forming rolls from the first roll of the first stage to the sixth roll 22 of the final stage, etc., and idlers arranged between individual forming rolls; hereby, an unfinished pipe body Q, in which the mutually joined portions of rim portions Ra, Ra are unwelded yet, is delivered from the sixth roll 22 of the final stage. The edge face of rim portions Ra, Ra, are formed into smooth face so as to be suitable for welding. After that, the high frequency welder 23 heats the mutually joined portions of rim portions Ra, Ra, and the pipe body Q is passed through the squeeze roll 24; hereby, the electric welded steel pipe P is obtained. Even if micro-cracks are generated in both rim portions Ra, Ra, they are satisfactorily mended by the melting of the metal due to the electric welding.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3455778A JPS54126656A (en) | 1978-03-24 | 1978-03-24 | Electric welded steel pipe superior in groove corrosion resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3455778A JPS54126656A (en) | 1978-03-24 | 1978-03-24 | Electric welded steel pipe superior in groove corrosion resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54126656A true JPS54126656A (en) | 1979-10-02 |
| JPS5742426B2 JPS5742426B2 (en) | 1982-09-08 |
Family
ID=12417605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3455778A Granted JPS54126656A (en) | 1978-03-24 | 1978-03-24 | Electric welded steel pipe superior in groove corrosion resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54126656A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106514030A (en) * | 2016-10-17 | 2017-03-22 | 番禺珠江钢管（连云港）有限公司 | Application method for X groove in thick-wall pipe high frequency induction welding |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58161621A (en) * | 1982-03-19 | 1983-09-26 | Isuzu Motors Ltd | Gear shift control mechanism for geared transmission |
-
1978
- 1978-03-24 JP JP3455778A patent/JPS54126656A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106514030A (en) * | 2016-10-17 | 2017-03-22 | 番禺珠江钢管（连云港）有限公司 | Application method for X groove in thick-wall pipe high frequency induction welding |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5742426B2 (en) | 1982-09-08 |
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