What is Non Destructive Testing ?



Non-destructive testing (NDT) is an engineering discipline that encompasses all methods for detecting and evaluating flaws in materials. Because flaws can affect the material's or structure's serviceability, NDT is critical for ensuring safe operation, quality control, and estimating plant life. Cracks or inclusions in welds and castings, as well as differences in structural properties, can result in a loss of strength or failure in service.





For in-service inspection and condition monitoring of operating plant, non-destructive testing is used. It can also be used to measure component sizes and spacings, as well as physical properties like hardness and internal stress.

The most important feature of NDT is that the test process has no negative impact on the material or structure being tested.


NDT encompasses a wide range of techniques, from simple visual inspection of surfaces to well-established methods such as radiography, ultrasonic testing, and magnetic particle crack detection, as well as new and highly specialized methods such as PAUT / TOFD.






NDT technologies can be used to inspect localized problem locations as well as automated production processes.