JPS5545523A - Heat effect reducing method of inside surface of butt welded joint part of reaction pipe for chemical machinery - Google Patents
Heat effect reducing method of inside surface of butt welded joint part of reaction pipe for chemical machineryInfo
- Publication number
- JPS5545523A JPS5545523A JP11749278A JP11749278A JPS5545523A JP S5545523 A JPS5545523 A JP S5545523A JP 11749278 A JP11749278 A JP 11749278A JP 11749278 A JP11749278 A JP 11749278A JP S5545523 A JPS5545523 A JP S5545523A
- Authority
- JP
- Japan
- Prior art keywords
- heat effect
- inside surface
- chemical machinery
- joint part
- welded joint
- 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 suppress the deposition of carbide which becomes the point for initiation of crazing by taking the root face of the root pass portion larger thereby reducing heat effect extending to the inside surface side of the pipe of the second and subsequent passes.
CONSTITUTION: In the case of butt welding reaction pipes for chemical machinery, the root pass 2 fusion bonds the base pipes 1 by a keyhole method of plasma welding. Here, the root face 5 is taken about 5mm or over. Then, the distance up to the inside surface of the pipe becomes larger and the heat effect at the forming of the deposited metal 3 of the second and subsequent passes by using wire cores becomes relatively smaller. Hence, the deposition of the carbide 4 deposited owing to this heat effect is suppressed and the fortification of the joint is achieved.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11749278A JPS5545523A (en) | 1978-09-26 | 1978-09-26 | Heat effect reducing method of inside surface of butt welded joint part of reaction pipe for chemical machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11749278A JPS5545523A (en) | 1978-09-26 | 1978-09-26 | Heat effect reducing method of inside surface of butt welded joint part of reaction pipe for chemical machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5545523A true JPS5545523A (en) | 1980-03-31 |
Family
ID=14713057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11749278A Pending JPS5545523A (en) | 1978-09-26 | 1978-09-26 | Heat effect reducing method of inside surface of butt welded joint part of reaction pipe for chemical machinery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5545523A (en) |
-
1978
- 1978-09-26 JP JP11749278A patent/JPS5545523A/en active Pending
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