JPS55100830A - Smoothing method for metallic pipe - Google Patents
Smoothing method for metallic pipeInfo
- Publication number
- JPS55100830A JPS55100830A JP742279A JP742279A JPS55100830A JP S55100830 A JPS55100830 A JP S55100830A JP 742279 A JP742279 A JP 742279A JP 742279 A JP742279 A JP 742279A JP S55100830 A JPS55100830 A JP S55100830A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- metallic pipe
- corrugated
- smooth
- tensile strength
- 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
Abstract
PURPOSE: To smooth the inner surface of the pipe, on purpose to contrive the reduction of the fluid resistance, by impressing an inner pressure, for generating a tension unexceedable the breaking tensile strength of the pipe material, on the metallic pipe, after laying the corrugated metallic pipe.
CONSTITUTION: The corrugated metallic pipe, advantageous for the transportation purpose, is brought into the erection site, and is laid down through the treatment like as the jointing work, setting work, etc.; after that, a hydraulic pressure, equivalent to 60W100%, for example, of the breaking tensile strength of the pipe material before being corrugated, is impressed on the inside of the pipe, and is kept as it is for about 5W60min. According to this method, almost corrugation disappears from the pipe wall, and the smooth pipe is obtained; therefore, its fluid resistance can be reduced.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP742279A JPS55100830A (en) | 1979-01-25 | 1979-01-25 | Smoothing method for metallic pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP742279A JPS55100830A (en) | 1979-01-25 | 1979-01-25 | Smoothing method for metallic pipe |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55100830A true JPS55100830A (en) | 1980-08-01 |
Family
ID=11665425
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP742279A Pending JPS55100830A (en) | 1979-01-25 | 1979-01-25 | Smoothing method for metallic pipe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55100830A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4871145A (en) * | 1983-02-23 | 1989-10-03 | Finn Martinsen A/S | Device for extension of aluminum ducts |
-
1979
- 1979-01-25 JP JP742279A patent/JPS55100830A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4871145A (en) * | 1983-02-23 | 1989-10-03 | Finn Martinsen A/S | Device for extension of aluminum ducts |
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