Method and system for detecting corrosion under insulation

• US 8,596,861 B2
• Filed: 11/06/2008
• Issued: 12/03/2013
• Est. Priority Date: 11/06/2008
• Status: Active Grant

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Kane, Russell D., Cohen, Isaac, Miezianko, Roland, Eden, David A.
• Primary Examiner(s): Jagan, Mirellys
• Application Number:
  US12/265,977
• Publication Number:
  US 20100107767A1
• Time in Patent Office: 1,853 Days
• Field of Search: 374/5, 374/4, 374/7, 374/121, 374/141, 374/124, 374/137
• US Class Current: 374/5
• CPC Class Codes: G01N 25/72 Investigating presence of flaws

Abstract

The present invention relates generally to thermal imaging systems and methods and uses therefor, and in a particular though non-limiting embodiment, to a method of detecting corrosion under insulation, as well as corrosion-related material data associated therewith. The system utilizes advanced infrared imaging video cameras to detect characteristic signatures of wet thermal traits on process equipment. Various embodiments of the invention integrate equipment, automation, and algorithms to form a method for identifying wet thermal insulation by scanning multiple locations along insulated piping, tanks, or other manufacturing equipment. Such scans can occur individually, sequentially, or simultaneously, with the results then being stored and comparatively analyzed. Further embodiments comprise tracking the approximate time of exposure to moisture, prediction of the corrosion rates for underlying insulated metal substrates, and measuring wall thicknesses along either predetermined random portions of the metal substrate.

Claims

1. A method of detecting corrosion under insulation, said method comprising:

disposing one or more thermal imaging devices in electromagnetic communication with an insulated substrate;

disposing said one or more thermal imaging devices in communication with an associated corrosion under insulation monitor comprising a moisture assessment unit, a metal substrate assessment unit, and a CUI monitor unit, strategically located proximate to said insulation at a plurality of locations;

scanning multiple location subsections of said insulated substrate simultaneously for temperature gradients experienced by said insulated substrate as a result of a process flow associated with said insulated substrate with said one or more thermal imaging devices;

using said one or more thermal imaging devices to scan multiple location subsections of said insulated substrate simultaneously for temperature gradients experienced by said insulated substrate as a result of a process flow associated with said insulated substrate;

obtaining corrosion related data, including said temperature gradients, by transmitting said corrosion related data to said corrosion under insulation monitor by means of said thermal imaging devices; and

communicating said corrosion related data to an operator via said CUI monitor unit.

2. The method of detecting corrosion under insulation of claim 1, said method further comprising:

disposing said one or more thermal imaging devices in electromagnetic communication with a metallic substrate.

3. The method of detecting corrosion under insulation of claim 1, said method further comprising:

disposing said one or more thermal imaging devices in electromagnetic communication with a non-metallic substrate conducive to the formation of corrosion.

4. The method of detecting corrosion under insulation of claim 1, said method further comprising:

disposing one or more of said thermal imaging devices wherein at least one of said thermal imaging devices is an infrared imaging camera in electromagnetic communication with said insulated substrate.

5. The method of detecting corrosion under insulation of claim 1, said method further comprising:

disposing said one or more thermal imaging devices in electromagnetic communication with said insulated substrate; and

scanning a plurality of insulated substrate regions sequentially, by means of said one or more thermal imaging devices.

6. The method of detecting corrosion under insulation of claim 1, said method further comprising:

obtaining corrosion related data wherein said corrosion related data comprises corrosion pitting data by means of said thermal imaging devices.

7. The method of detecting corrosion under insulation of claim 1, said method further comprising:

obtaining data evidencing the presence of a concentration of a corrosive species comprising organic scale by means of said thermal imaging devices.

8. The method of detecting corrosion under insulation of claim 1, said method further comprising:

obtaining data evidencing the presence of a concentration of a corrosive species comprising inorganic scale by means of said thermal imaging devices.

9. The method of detecting corrosion under insulation of claim 1, said method further comprising:

obtaining corrosion related data wherein said corrosion related data comprises data relating to at least one of a time of exposure to wetness; and

prediction of a rate of corrosion formation, by means of said thermal imaging devices.

10. The method of detecting corrosion under insulation of claim 1, said method further comprising:

disposing said thermal imaging device in wireless communication with an associated corrosion under insulation monitor.

11. A system for detecting corrosion under insulation, said system comprising:

one or more thermal imaging devices disposed in electromagnetic communication with an insulated substrate;

said one or more thermal imaging devices disposed in communication with one or more associated corrosion under insulation monitor comprising a moisture assessment unit, a metal substrate assessment unit, and a CUI monitor unit, strategically located proximate to said insulation at a plurality of locations, wherein said one or more thermal imaging devices scan multiple location subsections of said insulated substrate simultaneously for temperature gradients experienced by said insulated substrate as a result of a process flow associated with said insulated substrate;

a means for obtaining corrosion related data, including said temperature gradients, by transmitting said corrosion related data collected by said thermal imaging devices to said corrosion under insulation monitor; and

a means for communicating said corrosion related data to an operator.

12. The system for detecting corrosion under insulation of claim 11, said system further comprising:

said one or more thermal imaging devices in electromagnetic communication with a metallic substrate.

13. The system of detecting corrosion under insulation of claim 11, said system further comprising:

said one or more thermal imaging devices in electromagnetic communication with a non-metallic substrate conducive to the formation of corrosion.

14. The system of detecting corrosion under insulation of claim 11, said system further comprising:

one or more thermal imaging devices comprising at least one infrared imaging cameras in electromagnetic communication with said an insulated substrate.

15. The system of detecting corrosion under insulation of claim 11, said system further comprising:

said one or more thermal imaging devices in electromagnetic communication with said insulated substrate; and

a means for scanning a plurality of insulated substrate regions sequentially, using said one or more thermal imaging devices.

16. The system of detecting corrosion under insulation of claim 11, said system further comprising:

a means for obtaining corrosion related data wherein said corrosion related data comprises corrosion pitting data using said thermal imaging devices.

17. The system of detecting corrosion under insulation of claim 11, said system further comprising:

a means for obtaining data evidencing the presence of a concentration of a corrosive species comprising organic scale using said thermal imaging devices.

18. The system of detecting corrosion under insulation of claim 11, said system further comprising:

a means for obtaining data evidencing the presence of a concentration of a corrosive species comprising inorganic scale using said thermal imaging devices.

19. The system of detecting corrosion under insulation of claim 11, said system further comprising:

a means for obtaining corrosion related data wherein said corrosion related data comprises data relating to at least one of a time of exposure to wetness; and

prediction of a rate of corrosion formation.

20. The system of detecting corrosion under insulation of dam 11, said system further comprising:

a thermal imaging device disposed in wireless communication with an associated corrosion under insulation monitor.