JPS5611334A - Detection of leakage position for heat insulating tube and heat insulating tube using for it - Google Patents
Detection of leakage position for heat insulating tube and heat insulating tube using for itInfo
- Publication number
- JPS5611334A JPS5611334A JP8765079A JP8765079A JPS5611334A JP S5611334 A JPS5611334 A JP S5611334A JP 8765079 A JP8765079 A JP 8765079A JP 8765079 A JP8765079 A JP 8765079A JP S5611334 A JPS5611334 A JP S5611334A
- Authority
- JP
- Japan
- Prior art keywords
- heat insulating
- tube
- inside tube
- insulating tube
- conduit
- 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
- Examining Or Testing Airtightness (AREA)
- Pipeline Systems (AREA)
Abstract
PURPOSE: To make it possible to detect a leakage position with an easy work without excavation of the ground, by inserting a linear material into the conduit provided along the inside tube of a heat insulating tube and by sealing a prescribed gas in the inside tube to discolor the linear material by leakage.
CONSTITUTION: Heat insulating tube 1 buried between side walls 2 and 3 is constituted by inside tube 4 and heat insulator 6 of outside tube 5. Conduit 8 with small holes opened in the circumference direction is inserted into heat insulator 6 along the outside circumference face of this inside tube 4. In case of leakage check, inside tube 4 is first closed by plate materials 9 and 10, and nitrogen gas with ammonia gas mixed is compressed for a fixed time by gas supply unit 12. Linear material 13 where the discoloring material discoloring due to ammonia is stuck is inserted into conduit 8. If leakage position A exists, gas in inside tube 4 passes through small holes of conduit 8 to discolor linear material 13. When distance l of discoloring position B is measured, the leakage position can be detected easily without excavation of the ground.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8765079A JPS5611334A (en) | 1979-07-10 | 1979-07-10 | Detection of leakage position for heat insulating tube and heat insulating tube using for it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8765079A JPS5611334A (en) | 1979-07-10 | 1979-07-10 | Detection of leakage position for heat insulating tube and heat insulating tube using for it |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5611334A true JPS5611334A (en) | 1981-02-04 |
Family
ID=13920834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8765079A Pending JPS5611334A (en) | 1979-07-10 | 1979-07-10 | Detection of leakage position for heat insulating tube and heat insulating tube using for it |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5611334A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62239265A (en) * | 1986-04-10 | 1987-10-20 | Canon Inc | Document processor |
| JPS62239266A (en) * | 1986-04-10 | 1987-10-20 | Canon Inc | Document processor |
| CN103954408A (en) * | 2014-03-31 | 2014-07-30 | 舞阳钢铁有限责任公司 | Maintenance process for online fast leakage detection for air pre-heater |
| CN108468949A (en) * | 2018-05-08 | 2018-08-31 | 广州飞机维修工程有限公司 | A kind of chance water discoloration instruction pipe sleeve for Water pipe leaking detection |
-
1979
- 1979-07-10 JP JP8765079A patent/JPS5611334A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62239265A (en) * | 1986-04-10 | 1987-10-20 | Canon Inc | Document processor |
| JPS62239266A (en) * | 1986-04-10 | 1987-10-20 | Canon Inc | Document processor |
| CN103954408A (en) * | 2014-03-31 | 2014-07-30 | 舞阳钢铁有限责任公司 | Maintenance process for online fast leakage detection for air pre-heater |
| CN108468949A (en) * | 2018-05-08 | 2018-08-31 | 广州飞机维修工程有限公司 | A kind of chance water discoloration instruction pipe sleeve for Water pipe leaking detection |
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