What is NDT? 

NDT stands for non-destructive testing. 

Non-destructive testing, or NDT as it’s known, is the process of testing and evaluating materials or components without destroying or altering their serviceability. Put simply, NDT means that the part can still be used once it has been inspected or tested. 

NDT testing is used to detect and evaluate flaws in materials. These flaws can affect how serviceable a material is. As such, NDT is essential to ensuring that products are safe to use. 

The flaws in a material can vary depending on its usage, but could include issues such as cracks, structural variations or inclusions in castings. All of these can lead to a loss of strength for the material which could cause it to fail during service.  

NDT methods are also used for in-service inspection, where the conditions of the operating plant or factory are also evaluated. 

NDT covers a number of possible tests depending on the nature of the material under evaluation. These include visual examination of surfaces, radiography, ultrasonic testing, magnetic and particle crack detection, among others. 

Modern NDT tests can help lower production costs and streamline manufacturing processes, all while ensuring a high and uniform product quality level. During construction itself, NDT is used to ensure the quality of materials, with in-service NDT inspections used to ensure that the products that are currently in use have the integrity necessary to ensure their usefulness and the safety of the public.