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NDT Solution

Pipe Inspection by Infrared Thermography

Figure 5-7

Figure 5 - PAIRT method in transmission. Cold to hot sudden thermal transition starting at t = 0 s, apparatus of Figure 2, direction of water flow as indicated (to be compared with Figures 3 and 4, thermograms at t = 1.09 s). Time of observation of structures pointed by highlighted letter shown on Figure 6.

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Figure 6 - Wall thickness versus time of observation following Equation 1. Letters point to structures identified in Figures 3, 4, and 5.

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Figure 7 - Method in reflection (heat gun thermal pulse). Cold to warm sudden thermal transition starting at t = 0 s, same pipe as Figure 2.

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Copyright © 1999 by the American Society for Nondestructive Testing, Inc. All rights reserved.

[ Materials Evaluation ]

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