NONDESTRUCTIVE TESTING

NONDESTRUCTIVE TESTING

What is NDT ?

These days, Non-Destructive Testing -NDT for short- plays a very important role in safety and quality in our society.

Few manufactured products can be guaranteed to be perfect without any inspection or quality control, so that either samples must be extracted for testing or some sort of overall Non-Destructive Test (NDT) must be devised. With fabricated items such as, for instance, weldments, where a considerable degree of constructional skill is needed, it is even more important that a comprehensive system of non-destructive testing be applied.

Most NDT is designed to discover defects in materials, after which a decision is made as to whether the defect is significant from the point-of-view of service life, but NDT is also used for checking assemblies and for the development of manufacturing processes and for research.

The essential feature of NDT is that the test process itself produces no deleterious effects on the material or structure under test. Non-Destructive Testing makes the invisible become visible and has built up a tremendous reputation with regards to guaranteeing safety.

There are many methods of NDT, so that some skill and experience is needed in choosing the most appropriate technique for a particular application, from the point-of-view of technique performance, speed and economy, sensitivity etc.

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