Basic Understanding of NDT
NDT is a method of inspecting, testing, or evaluating materials, components, or assemblies for differences in characteristics without destroying the serviceability of the part or system.
NDT evaluates materials without causing damage, allowing the parts to be put into service. Destructive testing evaluates material properties in a manner that renders the specimen unusable.
There are three levels of NDT certification: Level I (perform specific tests), Level II (set up and calibrate equipment, interpret results), and Level III (develop procedures, interpret codes).
Certification ensures that NDT personnel have undergone rigorous training and have demonstrated competence, ensuring reliable and accurate testing results.
Becoming NDT certified involves a combination of education, experience, and passing a certification exam specific to the NDT method and level of qualification.
NDT Methods and Applications
Common NDT methods include Visual Inspection, Ultrasonic Testing, Magnetic Particle Testing, Liquid Penetrant Testing, Radiographic Testing, and Eddy Current Testing.
UT uses high-frequency sound waves to detect flaws in materials, with waves reflecting back from flaws to be detected by the transducer.
MT is used to detect surface and near-surface discontinuities in ferromagnetic materials.
Certification ensures that NDT personnel have undergone rigorous training and have demonstrated competence, ensuring reliable and accurate testing results.
PT involves applying a liquid to the surface of a part, which penetrates into flaws and is then made visible under UV light or by applying a developer.