Non Destructive Testing of Welds

Non destructive testing plays a significant part in maintaining the quality of the products at various stages of manufacture. Raw material stage i.e. before the start of manufacture, intermediate stages, final stage after manufacture all utilise Nondestructive testing techniques. The most commonly used techniques are Liquid Penetrant Inspection (LPI), Magnetic Particle Inspection, Ultrasonic Testing, Radiography Testing. In this article the basics of the testing techniques, equipment, methodologies and their limitations are covered in detail in the subsequent sections.