Radiographic Testing (RT) is a volumetric non-destructive evaluation (NDE) technique that helps to detect internal defects in castings, welds etc., which could not be detected by other NDE techniques like fluorescent penetrant, magnetic particle testing.
Using Helium to check leak in parts is highly effective compared to leak testing using normal atmospheric air. Helium Leak Testing is a type of non-destructive quality control testing of manufactured parts to ensure fluids do not leak into or out of the part. Depending on the material of the part and the criticality of the application of the part, leak rates to the extent of 1×10-12mbar.l.sec -1 need to be detected and measured.
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