NDT is an inspection or testing of base material and welded component or assembly by physical means, without affecting the ultimate serviceability of the material being tested. Thus, it can help increase production which brings more economical benefits to the manufacturer.

If you have knowledge or acquired mechanical engineering, it would help a lot in understanding the characteristics of various methods of NDT and their application to different industries such as oil & gas, construction, metal fabrication, power generation, aerospace and metal manufacturing, to name a few.

  1. Ultrasonic Inspection: Ultrasonic Testing (UT) uses a high frequency sound energy to conduct examinations and make measurements. Ultrasonic inspection can be used for flaw detection I evaluation, dimensional measurements, material characterization, and more.

  2. Magnetic particles: Magnetic particle inspection is one of the simple, fast and traditional nondestructive testing methods widely used because of its convenience and low cost. This method uses magnetic fields and small magnetic particles, such as iron filings to detect flaws in components.

  3. Liquid (Dye) penetrant method: Liquid penetrant inspection (LPI) is one of the most widely used nondestructive evaluation (NDE) methods. Its popularity can be attributed to two main factors, which are its relative ease of use and its flexibility. The technique is based on the ability of a liquid to be drawn into a "clean" surface breaking flaw by capillary action.

  4. Radiography: Radiography has an advantage over some of the other processes in that the radiography provides a permanent reference for the internal soundness of the object that is radiographed. The x-ray emitted from a source has an ability to penetrate metals as a function of the accelerating voltage in the x-ray emitting tube.

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