GB2211708A - Radiographic detection of pipe corrosion under lagging - Google Patents
Radiographic detection of pipe corrosion under lagging Download PDFInfo
- Publication number
- GB2211708A GB2211708A GB8725125A GB8725125A GB2211708A GB 2211708 A GB2211708 A GB 2211708A GB 8725125 A GB8725125 A GB 8725125A GB 8725125 A GB8725125 A GB 8725125A GB 2211708 A GB2211708 A GB 2211708A
- Authority
- GB
- United Kingdom
- Prior art keywords
- detector
- source
- pipe
- corrosion
- recording means
- 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
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
- G01N23/18—Investigating the presence of flaws defects or foreign matter
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
- G01N23/083—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption the radiation being X-rays
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- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Toxicology (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
Detection of underlagging corrosion on pipes (10), wherein a radiographic source (14) and an aligned radiation detector (15) are scanned over the outside of a lagged pipe (10), such that radiation from the source (14) penetrates the lagging and at least the surface of the pipe (10) before meeting the detector (15), and the latter is linked to display and/or recording means which immediately shows and/or records signals received by the detector (15) from the source (14). The source and detector are driven around the pipe by engagement with a ring gear (13) and along the pipe by engagement with a track (12). <IMAGE>
Description
CORROSION DETECTION
This invention is concerned with the detection of corrosion and, more specifically, with the detection of corrosion on the outside of pipework under lagging.
Such corrosion is normally referred to as underlagging corrosion.
One conventional method of detecting under lagging corrosion is by visual inspection after removing the lagging. This method is very costly. Radiographic inspection is also used, either using film - which is a very slow and a costly process - or using flash radiography - which is less slow than the film process but which provides a low quality of information.
It is an object of the present invention to provide a method of detecting underlagging corrosion which can be used to produce high quality results quickly.
According to the invention, there is provided a method of detecting under lagging corrosion on pipes in which a radiographic source and an aligned radiation detector are scanned over the outside of a lagged pipe, the arrangement being such that the radiation from the source penetrates the lagging and at least the surface of the pipe before meeting the detector, and said detector being linked to display and/or recording means which immediately show and/or record signals received by the detector from the source.
The radiographic source may be an X-ray source or a source of gamma rays derived from a radio-active isotope, e.g. IRIDIUM 192, COBALT 60 OR YTTERBIUM 193.
The detector may be a linear array of radiationsensitive diodes, or may be a fluoroscopic system using an image intensifier and video camera.
In practice, a mechanical support system will be provided to hold the source and the detector-on opposite sides of the pipe and enable them to be traversed circumferentially and lengthwise of the pipe, either continuously or step-by-step.
The above method enables good results to be obtained at high speed and, since "real-time" images can be produced, the results are immediately available and, if necessary, immediately verifiable.
The display means may conveniently comprise a TV monitor and the recording means may comprise a video tape or laser disc.
An embodiment of apparatus for carrying out the present invention is shown, by way of example only, in the drawings, in which:
Fig. 1 is a schematic drawing of the apparatus, and
Figs. 2 and 3 show two different methods of operating the apparatus.
In Fig. 1, a lagged pipe 10, which is being tested for underlagging corrosion, has secured thereon, by bands 11, a linear track 12. A scanning Jig 13 surrounds the pipe and is coupled to the track 12 so that the jig can be moved along the pipe. The jig can be rotated around the pipe and carries an X-ray head 14 and an X-ray detector head 15. Thus, the heads 14 and 15 can be simultaneously scanned around and along the pipe.
The X-rays may be directed diametrically through the pipe, as shown in Fig. 2, or tangentially of the pipe, as shown in Fig. 3.
The detector head 15 is preferably in the form of a linear array of diodes, ass previously mentioned, and may be connected to an acquisition unit which supplies information to a TV display unit via a frame store, which is under the control of a system controller.
Claims (18)
1. A method of detecting underlagging corrosion on pipes in which a radiographic source and an aligned radiation detector are scanned over the outside of a lagged pipe, such that the radiation from the source penetrates the lagging and at least the surface of the pipe before meeting the detector, wherein the detector is linked to display and/or recording means which shows and/or records immediately signals received by the detector from the source.
2. A method according to Claim 1, wherein the radiographic source is provided by an X-ray or gamma ray source derived from a radioactive isotope.
3. A method according to Claim 2, wherein the radioactive isotope is provided by Iridium 192, Cobalt 60 or Ytterbium 193.
4. A method according to Claim 1, 2 or 3, wherein the detector is provided by a linear array of radiation-sensitive diodes.
5. A method according to Claim 1, 2 or 3, wherein the detector is provided by a fluoroscopic system using an image intensifier and video camera.
6. A method according to any preceding claim, wherein the source and detector are provided on opposed sides of the pipe and are caused to traverse the pipe circumferentially and lengthwise thereof, either continuously or step-by-step.
7. A method according to any preceding claim, wherein the display means is provided by a television monitor.
8. A method according to any preceding claim, wherein said recording means comprises a video tape or laser disc.
9. A method of detecting underlagging corrosion on pipes substantially as hereinbefore described.
10. Apparatus for detecting underlagging corrosion on pipes comprising a radiographic source and an aligned radiation detector arranged to be scanned over the outside of a lagged pipe and display and/or recording means linked to the detector,
the arrangement being such that, in use of the apparatus, radiation from the source penetrates the lagging and at least the surface of the pipe before meeting the detector and signals received by the detector from the source are immediately shown and/or recorded on the respective display and/or recording means.
11. Apparatus according to Claim 10, wherein the radiographic source comprises an X-ray or gamma ray source derived from a radioactive isotope.
12. Apparatus according to Claim 11, wherein the radioactive isotope is Iridium 192, Cobalt 60 or
Ytterbium 193.
13. Apparatus according to Claim 10, 11 or 12, wherein the detector is a linear array of radiationsensitive diodes.
14. Apparatus according to Claim 10, 11 or 12, wherein the detector comprises a fluoroscopic system employing an image intensifier and video camera.
15. Apparatus according to any of Claims 10 to 14 including a mechanical support system arranged to hold the source and detector on opposed sides of the pipe and to enable them to traverse the pipe circumferentially and lengthwise thereof, either continuously or step-by-step.
16. Apparatus according to any of Claims 10 to 15, wherein said display means comprises a television monitor.
17. Apparatus according to any of Claims 10 to 16, wherein said recording means comprises a video tape or laser disc.
18. Apparatus for detecting underlagging corrosion on pipes, substantially as hereinbefore described with reference to the accompanying drawing.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8725125A GB2211708B (en) | 1987-10-27 | 1987-10-27 | Corrosion detection |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8725125A GB2211708B (en) | 1987-10-27 | 1987-10-27 | Corrosion detection |
Publications (3)
Publication Number | Publication Date |
---|---|
GB8725125D0 GB8725125D0 (en) | 1987-12-02 |
GB2211708A true GB2211708A (en) | 1989-07-05 |
GB2211708B GB2211708B (en) | 1991-04-17 |
Family
ID=10625951
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8725125A Expired - Fee Related GB2211708B (en) | 1987-10-27 | 1987-10-27 | Corrosion detection |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2211708B (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5420427A (en) * | 1990-06-22 | 1995-05-30 | Integrated Diagnostic Measurement Corporation | Mobile, multi-mode apparatus and method for nondestructively inspecting components of an operating system |
DE4343513A1 (en) * | 1993-12-20 | 1995-06-22 | Siemens Ag | Measuring system for welded seam testing |
DE4446960A1 (en) * | 1994-10-17 | 1996-04-18 | Sandor Kovacs | X-ray machine |
US5614720A (en) * | 1990-06-22 | 1997-03-25 | Integrated Diagnostic Measurement Corporation | Mobile, multi-mode apparatus and method for nondestructively inspecting components of an operating system |
US5648619A (en) * | 1994-10-19 | 1997-07-15 | Kvaerner Masa-Yards Oy | Arrangement for inspection of welded plate sections |
CN101387611B (en) * | 2008-10-14 | 2011-02-09 | 重庆大学 | Detection method of translational pipe CT detection device |
CN102695453A (en) * | 2009-08-28 | 2012-09-26 | 超科有限公司 | Method and apparatus for external pipeline weld inspection |
WO2015097452A1 (en) * | 2013-12-23 | 2015-07-02 | Johnson Matthey Public Limited Company | Adapter for measuring instrument |
CN105445300A (en) * | 2015-12-16 | 2016-03-30 | 天津三英精密仪器有限公司 | Full-field rod-shaped sample CT scanning device |
WO2016147006A1 (en) * | 2015-03-17 | 2016-09-22 | Johnson Matthey Public Limited Company | Apparatus and method for scanning a structure |
CN109488887A (en) * | 2017-09-11 | 2019-03-19 | 波音公司 | X-ray inspection system for pipeline |
US10502697B2 (en) | 2017-09-11 | 2019-12-10 | The Boeing Company | High speed pipe inspection system |
US11402339B2 (en) | 2011-11-02 | 2022-08-02 | Johnson Matthey Public Limited Company | Scanning method and apparatus comprising a buoyancy material for scanning an underwater pipeline or a process vessel |
EP4134663A1 (en) * | 2021-08-13 | 2023-02-15 | Mistras Group, Inc | Automated circumferential pipe scanning system |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BR102019004976B1 (en) | 2019-03-14 | 2021-10-26 | Petróleo Brasileiro S.A. - Petrobras | ANNULAR FLOODING DEVICE, ASSEMBLY AND METHOD WITH GAMMA TRANSMISSION IN A FLEXIBLE DUCT |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2064929A (en) * | 1979-10-29 | 1981-06-17 | Redmayne & Sons Its Ltd S | Pipe radiography apparatus and method |
GB2157930A (en) * | 1984-04-13 | 1985-10-30 | Ian Geoffrey Brewis Redmayne | Radiography apparatus |
EP0173660A2 (en) * | 1984-08-27 | 1986-03-05 | Stig Dahn | A method of detecting with the aid of x-ray radiation heterogeneities in the insulation of pipe assemblies in district heating systems, and apparatus for carrying out the method |
-
1987
- 1987-10-27 GB GB8725125A patent/GB2211708B/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2064929A (en) * | 1979-10-29 | 1981-06-17 | Redmayne & Sons Its Ltd S | Pipe radiography apparatus and method |
GB2157930A (en) * | 1984-04-13 | 1985-10-30 | Ian Geoffrey Brewis Redmayne | Radiography apparatus |
EP0173660A2 (en) * | 1984-08-27 | 1986-03-05 | Stig Dahn | A method of detecting with the aid of x-ray radiation heterogeneities in the insulation of pipe assemblies in district heating systems, and apparatus for carrying out the method |
Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5420427A (en) * | 1990-06-22 | 1995-05-30 | Integrated Diagnostic Measurement Corporation | Mobile, multi-mode apparatus and method for nondestructively inspecting components of an operating system |
US5614720A (en) * | 1990-06-22 | 1997-03-25 | Integrated Diagnostic Measurement Corporation | Mobile, multi-mode apparatus and method for nondestructively inspecting components of an operating system |
DE4343513A1 (en) * | 1993-12-20 | 1995-06-22 | Siemens Ag | Measuring system for welded seam testing |
DE4446960A1 (en) * | 1994-10-17 | 1996-04-18 | Sandor Kovacs | X-ray machine |
US5648619A (en) * | 1994-10-19 | 1997-07-15 | Kvaerner Masa-Yards Oy | Arrangement for inspection of welded plate sections |
CN101387611B (en) * | 2008-10-14 | 2011-02-09 | 重庆大学 | Detection method of translational pipe CT detection device |
CN102695453A (en) * | 2009-08-28 | 2012-09-26 | 超科有限公司 | Method and apparatus for external pipeline weld inspection |
US9217720B2 (en) | 2009-08-28 | 2015-12-22 | Shawcor Ltd | Method and apparatus for external pipeline weld inspection |
CN102695453B (en) * | 2009-08-28 | 2016-01-20 | 超科有限公司 | For the method and apparatus of exterior tubing welding inspection |
EP3650845B1 (en) * | 2011-11-02 | 2024-02-14 | Johnson Matthey Public Limited Company | Scanning method and apparatus |
US11474053B2 (en) | 2011-11-02 | 2022-10-18 | Johnson Matthey Public Limited Company | Scanning method and apparatus comprising a buoyancy material and a remotely operated vehicle (ROV) for scanning an underwater pipeline or a process vessel |
US11402339B2 (en) | 2011-11-02 | 2022-08-02 | Johnson Matthey Public Limited Company | Scanning method and apparatus comprising a buoyancy material for scanning an underwater pipeline or a process vessel |
US10132762B2 (en) | 2013-12-23 | 2018-11-20 | Johnson Matthey Public Limited Company | Adapter for measuring instrument |
AU2014372315B2 (en) * | 2013-12-23 | 2019-02-28 | Tracerco Limited | Adapter for measuring instrument |
US10416100B2 (en) | 2013-12-23 | 2019-09-17 | Johnson Matthey Public Limited Company | Adapter for measuring instrument |
WO2015097452A1 (en) * | 2013-12-23 | 2015-07-02 | Johnson Matthey Public Limited Company | Adapter for measuring instrument |
US10697905B2 (en) | 2015-03-17 | 2020-06-30 | Johnson Matthey Public Limited Company | Apparatus and method for scanning a structure |
WO2016147006A1 (en) * | 2015-03-17 | 2016-09-22 | Johnson Matthey Public Limited Company | Apparatus and method for scanning a structure |
CN105445300A (en) * | 2015-12-16 | 2016-03-30 | 天津三英精密仪器有限公司 | Full-field rod-shaped sample CT scanning device |
CN109488887A (en) * | 2017-09-11 | 2019-03-19 | 波音公司 | X-ray inspection system for pipeline |
EP3454049A3 (en) * | 2017-09-11 | 2019-04-10 | The Boeing Company | X-ray inspection system for pipes |
US10502697B2 (en) | 2017-09-11 | 2019-12-10 | The Boeing Company | High speed pipe inspection system |
US10578565B2 (en) | 2017-09-11 | 2020-03-03 | The Boeing Company | X-ray inspection system for pipes |
EP4134663A1 (en) * | 2021-08-13 | 2023-02-15 | Mistras Group, Inc | Automated circumferential pipe scanning system |
US11639905B2 (en) | 2021-08-13 | 2023-05-02 | Mistras Group, Inc. | Automated circumferential pipe scanning system |
Also Published As
Publication number | Publication date |
---|---|
GB8725125D0 (en) | 1987-12-02 |
GB2211708B (en) | 1991-04-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19931027 |