Thermographic Testing Presentation

7/17/2019 Thermographic Testing Presentation

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Thermographic Testing

VibrotechReliability

ServicesLimited



What is Thermography?

Infra Red Thermography is a technique for

producing a visible image of invisible (to our eyesinfra red radiation emitted by ob!ects due to theirthermal conditions



Thermography

"b!ectives of Test

• To detect hot or cold area#s

• To determine absolute temperature

• To vie$ Thermal profiles• To detect temperature loss



Thermography

Infra Red is part of the

%lectromagnetic

Spectrum

• It travels in straight lines at

the speed of light

• The useful part is divided

bet$een Short and Long

$avelengths

• &se of the correct $avelength

is essential



Test %quipment

• 'and held portable camera

• attery )o$ered

• "perating at correct$avelength

• Range*++,-./c to 012../c

•

Sensitivity*++.+1/c at 3./c• Real time display

• Image Recording capability



Why Thermography?

• 4on 5ontact

• Rapid Scanning

• 6ata can be recorded in differing formats

• Images produced are comprehensive 7

reliable

• Is there a viable alternative?



)rinciples of "peration

• "b!ect radiates infra red radiation

• Temperature difference

• 6ifferences are detected and displayed visually

• %missivity values must be observed



8dvantages

• 4on 5ontact

• 4on Intrusive

• 5an $or9 at a distance

• :ast and Reliable

•

)ortable• 5onvincing Results



Limitations

• 4on Intrinsically safe

• There must be a temperature difference for

certain surveys

• "perator e;perience is essential

• :ilters may be needed for certain applications

• Sensitivity and Resolution reduce $ith

distance and angle of vie$



%lectrical

• S$itch <ear

•

:use bo;es• 5able runs

• %lectrical connectors

• Insulation• Transformers



=unction o;

22.7°C

43.7°C

25

30

35

40

SP01



:an

18.7°C

37.4°C

20

25

30

35

AR01



:use o;

23.3°C

38.1°C

25

30

35

LI01



%lectrical 5onnections

&sed for the detection of>

•

5orroded connections• Slac9 loose connectors

• 5onnectors at too high an

operating temperature

• 'ot spots



Transformers

• %lectrical connections

•

Insulators• Thermal profile

• "perating

temperature

• Liquid Level



Refractory Linings

• Torpedo ladles

• oilers

• :urnaces

• %;hausts

•

6ucting• @ilns



Rotary @iln , 8ccess 6oor

77.8°C

129.3°C

80

90

100

110

120

SP01

SP02

SP03

SP04

LI01



@iln , Refractory Lining

22.5°C

48.7°C

25

30

35

40

45

SP01

SP02

SP03

22.6°C

58.5°C

30

40

50

SP01

SP02

SP03

LI01SP04



Torpedo Ladle



Steel 5arrying Ladle



uilding Surveys

&sed to detectA

•

Lac9 of insulation• 5old air infiltration

6raughts

• Boisture traps

• 'ot $arm air escaping

• Structural Integrity

• 'eating 5ooling



uilding Surveys



uilding Surveys

BoistureWater Ingress

• Lea9ing Roof

• ridged 5avity

• Lea9ing pipes



Refinery 7 )etro,5hem

• Vessel Surveys

• loc9ages

• 6efective lagging or

insulation

• Steam traps

• %rosion 5orrosion



Vessel Surveys



:lare Stac9s



)rocess )lant

The above Thermograms sho$ ho$

Thermography can be used as a very fast and

effective maintenance tool+

– The image on the right has a defective cylinder



)rocess )lant

Thermography may be

used for>

• 5orrosion surveys

• %nsuring valve operation

• Lea9s

• loc9ages



)rocess )lant

• 'ot spots

• 5old spots (5ryogenics

• 6amaged or missing

insulation

• Tan9 levels



Biscellaneous

• The detection of

process or

manufacturing faults• 5an be used as a

quality control tool

Thermographic Testing Presentation

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