9: Non-destructive Examination
API ICP Self Study Materials
API ICP Self Study Materials
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9.1 DISCONTINUITIES<br />
<strong>Non</strong>-<strong>destructive</strong> <strong>Examination</strong> (NDE) is defined as those inspection methods,<br />
which allow materials to be examined without changing or destroying their<br />
usefulness. NDE is an integral part of the quality assurance program. A<br />
number of NDE methods are employed to ensure that the weld meets design<br />
specifications and does not contain defects. The inspector should choose an<br />
NDE method capable of detecting the discontinuity in the type of weld joint<br />
due to the configuration. Table 2 and Figure 11 lists the common types and<br />
location of discontinuities and illustrates their positions within a butt weld. The<br />
most commonly used NDE methods used during weld inspection are shown<br />
in Table 3.