JPS5422890A - Location of damage of corrosion preventive coating film of steel pipe laid on water bottom - Google Patents
Location of damage of corrosion preventive coating film of steel pipe laid on water bottomInfo
- Publication number
- JPS5422890A JPS5422890A JP8780877A JP8780877A JPS5422890A JP S5422890 A JPS5422890 A JP S5422890A JP 8780877 A JP8780877 A JP 8780877A JP 8780877 A JP8780877 A JP 8780877A JP S5422890 A JPS5422890 A JP S5422890A
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- damage
- location
- coating film
- water bottom
- 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
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
PURPOSE: To accurately locate even a fine flow even at a depth larger than 10m by impressing AC signals between the body of a laied pipe and water or the earth and by moving a search coil in the vicinity of a steel pipe to grasp the variation in the AC signals induced.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8780877A JPS5422890A (en) | 1977-07-20 | 1977-07-20 | Location of damage of corrosion preventive coating film of steel pipe laid on water bottom |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8780877A JPS5422890A (en) | 1977-07-20 | 1977-07-20 | Location of damage of corrosion preventive coating film of steel pipe laid on water bottom |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5422890A true JPS5422890A (en) | 1979-02-21 |
Family
ID=13925266
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8780877A Pending JPS5422890A (en) | 1977-07-20 | 1977-07-20 | Location of damage of corrosion preventive coating film of steel pipe laid on water bottom |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5422890A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58168954A (en) * | 1982-03-17 | 1983-10-05 | ブリテイツシユ・ガス・コ−ポレ−シヨン | Device for measuring defect of insulating film |
JPH02295405A (en) * | 1989-05-09 | 1990-12-06 | Mametora Noki Kk | Plating part in horticultural transplanter |
US5404104A (en) * | 1992-03-11 | 1995-04-04 | Agip S.P.A. - Snam S.P.A. | Device and method for monitoring and locating defects in, and detachment of, the protective covering of underground or immersed metal structures or pipelines |
JPH10206390A (en) * | 1997-01-22 | 1998-08-07 | Kawasaki Steel Corp | Method for detecting damage of covering of buried steel pipe |
-
1977
- 1977-07-20 JP JP8780877A patent/JPS5422890A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58168954A (en) * | 1982-03-17 | 1983-10-05 | ブリテイツシユ・ガス・コ−ポレ−シヨン | Device for measuring defect of insulating film |
JPH02295405A (en) * | 1989-05-09 | 1990-12-06 | Mametora Noki Kk | Plating part in horticultural transplanter |
US5404104A (en) * | 1992-03-11 | 1995-04-04 | Agip S.P.A. - Snam S.P.A. | Device and method for monitoring and locating defects in, and detachment of, the protective covering of underground or immersed metal structures or pipelines |
JPH10206390A (en) * | 1997-01-22 | 1998-08-07 | Kawasaki Steel Corp | Method for detecting damage of covering of buried steel pipe |
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