1. Thermographic Testing Vibrotech Reliability Services Limited

2. What is Thermography? Infra Red Thermography is a technique for producing a visible image of invisible (to our eyes) infra red radiation emitted by objects due to their thermal conditions

3. Thermography Objectives of Test To detect hot or cold area’s To determine absolute temperature To view Thermal profiles To detect temperature loss

4. Thermography Infra Red is part of the Electromagnetic Spectrum It travels in straight lines at the speed of light The useful part is divided between Short and Long wavelengths Use of the correct wavelength is essential

5. Test Equipment Hand held portable camera Battery Powered Operating at correct wavelength Range…..-20°c to +1500°c Sensitivity…..0.1°c at 30°c Real time display Image Recording capability

6. Why Thermography? Non Contact Rapid Scanning Data can be recorded in differing formats Images produced are comprehensive & reliable Is there a viable alternative?

7. Principles of Operation Object radiates infra red radiation Temperature difference Differences are detected and displayed visually Emissivity values must be observed

8. Advantages Non Contact Non Intrusive Can work at a distance Fast and Reliable Portable Convincing Results

9. Limitations Non Intrinsically safe There must be a temperature difference for certain surveys Operator experience is essential Filters may be needed for certain applications Sensitivity and Resolution reduce with distance and angle of view

10. Electrical Switch Gear Fuse boxes Cable runs Electrical connectors Insulation Transformers

11. Junction Box

12. Fan

13. Fuse Box

14. Electrical Connections Used for the detection of; Corroded connections Slack / loose connectors Connectors at too high an operating temperature Hot spots

15. Transformers Electrical connections Insulators Thermal profile Operating temperature Liquid Level

16. Refractory Linings Torpedo ladles Boilers Furnaces Exhausts Ducting Kilns

17. Rotary Kiln - Access Door

18. Kiln - Refractory Lining

19. Torpedo Ladle

20. Steel Carrying Ladle

21. Building Surveys Used to detect, Lack of insulation Cold air infiltration Draughts Moisture traps Hot / warm air escaping Structural Integrity Heating / Cooling

22. Building Surveys

23. Moisture/Water Ingress Leaking Roof Bridged Cavity Leaking pipes

24. Refinery & Petro-Chem Vessel Surveys Blockages Defective lagging or insulation Steam traps Erosion / Corrosion

25. Vessel Surveys

26. Flare Stacks

27. Process Plant The above Thermograms show how Thermography can be used as a very fast and effective maintenance tool. –The image on the right has a defective cylinder

28. Process Plant Thermography may be used for; Corrosion surveys Ensuring valve operation Leaks Blockages

29. Process Plant Hot spots Cold spots (Cryogenics) Damaged or missing insulation Tank levels

30. Miscellaneous The detection of process or manufacturing faults Can be used as a quality control tool