NDT – Non Destructive Testing is non-invasive techniques to determine the integrity of a material, component or structure or quantitatively measure some characteristic of an object. In contrast to destructive testing, NDT is an assessment without doing harm, stress or destroying the test object. The destruction of the test object usually makes destructive testing more costly and it also inappropriate in many circumstances.

NDT plays a crucial role in ensuring cost effective operation, safety and reliability of plant, with resultant benefit to the community. NDT is used in a wide range of industrial areas and is used at almost any stage in the production or life cycle of many components. The mainstream applications are in aerospace, power generation, automotive, railway, petrochemical and pipeline markets. NDT of welds is one of the most used applications. Is very difficult to weld or mould a solid object that has no risk of breaking in service, so testing at manufacture and during use is often essential.

NDT is vital for constructing and maintaining all types of components and structures. To detect different discontinuities or defects such as cracking and corrosion, there are different methods of testing or inspection available. The common NDT products and methods are like Ultrasonic Testing, (UT), Radiographic Testing (RT) using X-Ray or Gamma-Ray, Magnetic Particle Inspection (MPI), Eddy Current Testing (ET), Dye Penetrant (DP), Remote Visual Inspection (RVI)  etc.

Sample of applications:

1. Eddy Current is a fast, accurate, cost-effective electro-magnetic NDT method for detection of surface or near surface flaws and for heat treatment verification. It is used for the inspection of raw materials, quality control of finished products and for maintenance inspections.

2. Radiography is widely regarded as one of the most reliable and proven nondestructive testing methods. It offers unique benefits, such as revealing changes in thickness, internal and external defects, interior assembly details and more. We offer conventional film radiography, digital technologies, portable and stationary X-ray sources, integrated inline systems, 3D computed tomography, metrology solutions and analytical X-ray diffraction systems.

3. Ultrasonic Testing is a versatile nondestructive evaluation method using high frequency sound beams to help detect internal discontinuities in a wide range of materials, including metals, plastics and composites. It is widely used for testing welds, forgings,bars/billets, tubing and tanks for corrosion.

4. Remote Visual Inspection is a cost-effective inspection technique used to capture real-time views and images from inside voids such as tubes, pipes, machines, engines and enclosed structures. RVI can be a complementary technique to other NDT disciplines and is frequently used as the primary inspection method