JPS6440788A - Corrosionproof repair method of line pipe welded joint section - Google Patents
Corrosionproof repair method of line pipe welded joint sectionInfo
- Publication number
- JPS6440788A JPS6440788A JP19422587A JP19422587A JPS6440788A JP S6440788 A JPS6440788 A JP S6440788A JP 19422587 A JP19422587 A JP 19422587A JP 19422587 A JP19422587 A JP 19422587A JP S6440788 A JPS6440788 A JP S6440788A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- welded joint
- shrinkable tube
- shrink
- heated
- 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
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
PURPOSE: To provide excellent sealing and shrinking characteristics and improve mechanical properties in use under a high temperature by using a polypropylene low-temperature shrinkable tube as the first layer and arranging a polypropylene shrinkable tube on the upper layer. CONSTITUTION: As a first step for applying corrosion preventive coatings to welded joints of plain pipes 12, a polyethylene low-temperature shrinkable tube 16 with adhesives on the inner surface is heated to shrink and coated tightly as the first layer. Then a polypropylene shrinkable tube 18 is laminated on the first layer as the second layer and heated to shrink. In other words, after smuts such as scales outside the copper tube of the welded joint are removed, various shrinkable tubes of the first and second layers fitted beforehand are put on the welded joint in sequence and heated to shrink.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19422587A JPS6440788A (en) | 1987-08-03 | 1987-08-03 | Corrosionproof repair method of line pipe welded joint section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19422587A JPS6440788A (en) | 1987-08-03 | 1987-08-03 | Corrosionproof repair method of line pipe welded joint section |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6440788A true JPS6440788A (en) | 1989-02-13 |
Family
ID=16321041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19422587A Pending JPS6440788A (en) | 1987-08-03 | 1987-08-03 | Corrosionproof repair method of line pipe welded joint section |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6440788A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002188767A (en) * | 2000-12-25 | 2002-07-05 | Hitachi Metals Ltd | Internal corrosive-resistant pipe joint |
| JP2006194368A (en) * | 2005-01-14 | 2006-07-27 | Nippon Steel Corp | Anticorrosive coating structure for site welded part |
| JP2009068661A (en) * | 2007-09-17 | 2009-04-02 | Toho Gas Co Ltd | Repair method of steel pipe |
| WO2018222284A1 (en) * | 2017-05-31 | 2018-12-06 | Dow Global Technologies Llc | Method for coating a pipeline field joint |
-
1987
- 1987-08-03 JP JP19422587A patent/JPS6440788A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002188767A (en) * | 2000-12-25 | 2002-07-05 | Hitachi Metals Ltd | Internal corrosive-resistant pipe joint |
| JP2006194368A (en) * | 2005-01-14 | 2006-07-27 | Nippon Steel Corp | Anticorrosive coating structure for site welded part |
| JP2009068661A (en) * | 2007-09-17 | 2009-04-02 | Toho Gas Co Ltd | Repair method of steel pipe |
| WO2018222284A1 (en) * | 2017-05-31 | 2018-12-06 | Dow Global Technologies Llc | Method for coating a pipeline field joint |
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