NDT stands for Non-Destructive Testing, also known as Non-Destructive Evaluation (NDE) or Non-Destructive Inspection (NDI). It refers to a wide range of techniques and methods used to assess the integrity, quality, and properties of materials, components, and structures without causing any damage to the object being examined. The primary purpose of NDT is to detect and characterize defects, anomalies, or discontinuities that could affect the performance, safety, or reliability of the tested items.

NDT techniques are employed across various industries, including manufacturing, aerospace, automotive, construction, energy, and many others, to ensure the quality and safety of products and structures.

Each NDT method has its strengths, limitations, and specific applications, and the choice of method depends on factors such as the type of material, the nature of the defects being sought, and the specific requirements of the inspection. NDT plays a crucial role in ensuring product quality, safety, and reliability, as it allows for the detection of defects early in the manufacturing process or during the operational life of a structure, preventing costly failures and accidents.