JPS6434513A - Manufacture of wear resistant bent duplex pipe - Google Patents
Manufacture of wear resistant bent duplex pipeInfo
- Publication number
- JPS6434513A JPS6434513A JP19206387A JP19206387A JPS6434513A JP S6434513 A JPS6434513 A JP S6434513A JP 19206387 A JP19206387 A JP 19206387A JP 19206387 A JP19206387 A JP 19206387A JP S6434513 A JPS6434513 A JP S6434513A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- pieces
- wear resistant
- inner pipe
- diameter
- 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
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
PURPOSE:To improve productivity of a duplex pipe and to prevent the breaking of an inner pipe by bonding a number of wear resistant material pieces on the surface of a bend keeping pipe to form the inner pipe, then by joining the bent outer pipe and the lining inner pipe. CONSTITUTION:A number of the wear resistant material pieces 4 are previously bonded on the curved surface of the bend keeping pipe 3 and disposed. At this time, the outer diameter of the pipe 3 on the outer surface of the pieces 4 is nearly in accord with the inner diameter of the bent outer pipe. Then, the lining inner pipe 2 bonding the pieces 4 is inserted into the bent outer pipe 1, and while the pipes 1, 2 are moved relatively, the pipe 1 diameter is reduced and the lining inner pipe 2 is compressed through a heating system 6 and cooling water injecting means 7, 7 disposed on the outer periphery of the pipe 1. The micro-elastic deformation of the pipe 3 eases an excessive compressive stress of the pieces 4. Because the pipes 1, 2 are jointed with a proper strength by this method, the productivity of the duplex pipe is improved and the breaking of the inner pipe 2 is prevented.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19206387A JPS6434513A (en) | 1987-07-31 | 1987-07-31 | Manufacture of wear resistant bent duplex pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19206387A JPS6434513A (en) | 1987-07-31 | 1987-07-31 | Manufacture of wear resistant bent duplex pipe |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6434513A true JPS6434513A (en) | 1989-02-06 |
JPH0576386B2 JPH0576386B2 (en) | 1993-10-22 |
Family
ID=16285008
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19206387A Granted JPS6434513A (en) | 1987-07-31 | 1987-07-31 | Manufacture of wear resistant bent duplex pipe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6434513A (en) |
-
1987
- 1987-07-31 JP JP19206387A patent/JPS6434513A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPH0576386B2 (en) | 1993-10-22 |
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