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
- 238000000034 method Methods 0.000 title claims description 5
- 239000000126 substance Substances 0.000 title description 2
- 239000011247 coating layer Substances 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 abstract description 26
- 239000010959 steel Substances 0.000 abstract description 26
- 238000005260 corrosion Methods 0.000 abstract description 11
- 230000007797 corrosion Effects 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 abstract description 4
- 239000012777 electrically insulating material Substances 0.000 abstract description 2
- 239000010410 layer Substances 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 description 10
- 238000000576 coating method Methods 0.000 description 10
- 238000010276 construction Methods 0.000 description 7
- 238000005536 corrosion prevention Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 238000004210 cathodic protection Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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 (show.php) | 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 (show.php) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4736272A (en) * | 1986-04-30 | 1988-04-05 | Ngk Insulators, Ltd. | Current-limiting arcing horn |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0231342B2 (show.php) | 1990-07-12 |
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