Understanding NRT- Reading 1- 2 of 2- Radiogaphic Testing A
Understanding nrt reading 1- 2 of 2- radiogaphic testing a
Understanding nrt reading 1- 2 of 2- radiogaphic testing a
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that the radiographic technique is capable <strong>of</strong> showing a material loss <strong>of</strong> 2% in<br />
the area <strong>of</strong> interest.It should be noted that even if 2-2T sensitivity is indicated<br />
on a radiograph, a defect <strong>of</strong> the same diameter and material loss may not be<br />
visible. The holes in the penetrameter represent sharp boundaries, and a<br />
small thickness change. Discontinues within the part may contain gradual<br />
changes, and are <strong>of</strong>ten less visible. The penetrameter is used to indicate<br />
quality <strong>of</strong> the radiographic technique and not intended to be used as a<br />
measure <strong>of</strong> size <strong>of</strong> cavity that can be located on the radiograph.<br />
Charlie Chong/ Fion Zhang
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