JPS551940A - Welding method of girth joints for pipelines - Google Patents
Welding method of girth joints for pipelinesInfo
- Publication number
- JPS551940A JPS551940A JP7483978A JP7483978A JPS551940A JP S551940 A JPS551940 A JP S551940A JP 7483978 A JP7483978 A JP 7483978A JP 7483978 A JP7483978 A JP 7483978A JP S551940 A JPS551940 A JP S551940A
- Authority
- JP
- Japan
- Prior art keywords
- welding
- outside
- weld beads
- pipe
- 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.)
- Pending
Links
Landscapes
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
PURPOSE: To achieve the automation of the welding process of pipeline laying and the higher reliability of welding by expanding the pipe from its inside, forming the first pass weld beads from the outside then finish-welding the inside surface while welding the outside.
CONSTITUTION: In the first welding stage a, the pipes 1 to be welded to themselves are expanded and centered by inside pipe expanding clamps 6 and the first pass weld beads having sufficient strength to hold the joint are formed through gas metal arc welding using an outside welder 7. Next, in the second b and subsequent stages, the pipe inside is welded by plasma torch 4. Even in this second b and subsequent stages, the welding of overlapping runs for the second and subsequent passes of the outside is accomplished in succession. This method enables the operations to be simplified and the stable weld beads to be obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7483978A JPS551940A (en) | 1978-06-22 | 1978-06-22 | Welding method of girth joints for pipelines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7483978A JPS551940A (en) | 1978-06-22 | 1978-06-22 | Welding method of girth joints for pipelines |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS551940A true JPS551940A (en) | 1980-01-09 |
Family
ID=13558894
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7483978A Pending JPS551940A (en) | 1978-06-22 | 1978-06-22 | Welding method of girth joints for pipelines |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS551940A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3213851A1 (en) * | 2009-12-01 | 2017-09-06 | Saipem S.p.A. | A method of and a welding station for laying a pipeline, with pipe section connected together by internal and external welding |
-
1978
- 1978-06-22 JP JP7483978A patent/JPS551940A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3213851A1 (en) * | 2009-12-01 | 2017-09-06 | Saipem S.p.A. | A method of and a welding station for laying a pipeline, with pipe section connected together by internal and external welding |
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