JPS5863844A - 地中埋設金属管の損傷探知方法 - Google Patents
地中埋設金属管の損傷探知方法Info
- Publication number
- JPS5863844A JPS5863844A JP16319181A JP16319181A JPS5863844A JP S5863844 A JPS5863844 A JP S5863844A JP 16319181 A JP16319181 A JP 16319181A JP 16319181 A JP16319181 A JP 16319181A JP S5863844 A JPS5863844 A JP S5863844A
- Authority
- JP
- Japan
- Prior art keywords
- pipe body
- current
- damage
- underground
- conductive member
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/20—Investigating the presence of flaws
- G01N27/205—Investigating the presence of flaws in insulating materials
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16319181A JPS5863844A (ja) | 1981-10-12 | 1981-10-12 | 地中埋設金属管の損傷探知方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16319181A JPS5863844A (ja) | 1981-10-12 | 1981-10-12 | 地中埋設金属管の損傷探知方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5863844A true JPS5863844A (ja) | 1983-04-15 |
JPH0231342B2 JPH0231342B2 (fr) | 1990-07-12 |
Family
ID=15768991
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16319181A Granted JPS5863844A (ja) | 1981-10-12 | 1981-10-12 | 地中埋設金属管の損傷探知方法 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5863844A (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0148267A1 (fr) * | 1983-04-12 | 1985-07-17 | Osaka Gas Co., Ltd | Procede et dispositif de detection de l'endommagement d'un objet enterre |
US4736272A (en) * | 1986-04-30 | 1988-04-05 | Ngk Insulators, Ltd. | Current-limiting arcing horn |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53134486A (en) * | 1977-04-28 | 1978-11-24 | Sumikin Kokan Koji Kk | Inspection method and apparatus for flawed parts of coated film on underground coated steel pipes |
JPS5421388A (en) * | 1977-07-18 | 1979-02-17 | Sumitomo Chemical Co | Position detecting method of defect of corrosion resistant coating layer of underground steel pipe |
-
1981
- 1981-10-12 JP JP16319181A patent/JPS5863844A/ja active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53134486A (en) * | 1977-04-28 | 1978-11-24 | Sumikin Kokan Koji Kk | Inspection method and apparatus for flawed parts of coated film on underground coated steel pipes |
JPS5421388A (en) * | 1977-07-18 | 1979-02-17 | Sumitomo Chemical Co | Position detecting method of defect of corrosion resistant coating layer of underground steel pipe |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0148267A1 (fr) * | 1983-04-12 | 1985-07-17 | Osaka Gas Co., Ltd | Procede et dispositif de detection de l'endommagement d'un objet enterre |
US4736272A (en) * | 1986-04-30 | 1988-04-05 | Ngk Insulators, Ltd. | Current-limiting arcing horn |
Also Published As
Publication number | Publication date |
---|---|
JPH0231342B2 (fr) | 1990-07-12 |
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