CONVENTIONAL NON DESTRUCTIVE TEST (NDT)
This technique involves the use of penetrating gamma or X-radiation to examine parts and products for imperfections.
An X-ray machine or radioactive isotope is used as a source of radiation. Radiation is directed through a part and onto film or other media. The resulting shadowgraph shows the internal soundness of the part.
Possible imperfections are indicated as density changes in the film in the same manner as an X-ray shows broken bones.
- all type material can be inspected
- permanent record ( radiography film )
- Length of tefect can be sized
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