NDT TRAINING IN CHENNAI

NON DESTRUCTIVE TESTING

Nondestructive Testing (NDT) is the use of non invasive techniques to determine the integrity of a material, component or structure. It also is a means to quantitatively measure some characteristic of an object.

ULTRASONIC TESTING

Ultrasonic Testing (UT) uses high frequency sound energy to conduct examinations and make measurements. Ultrasonic inspection can be used for flaw detection/evaluation, dimensional measurements, material characterization, and much more. Although there are a number of technologies employing ultrasound, the simplest explanation of what happens in this method is that sound energy is introduced via a transducer and propagates through the materials in the form of waves.

MAGNETIC PARTICLE TESTING

Magnetic Particle Inspection is a nondestructive testing method used for detecting surface and near surface flaws and defects. MPI is fast and relatively easy to apply, and surface preparation is not as critical as it is for other NDT methods. These characteristics make MPI one of the most widely utilized nondestructive testing methods. MPI uses magnetic fields and small magnetic particles similar to iron filings to detect flaws in components.

LIQUID PENETRANT TESTING

Liquid penetrant inspection is a nondestructive testing method that reveals surface breaking flaws by bleedout of a penetrating liquid colored with a visible or fluorescent dye from the flaw. The technique is based on the ability of a liquid to be drawn into a "clean" (in other words, unobstructed) surface breaking flaw by capillary action. After an appropriate period of time for penetration has papsed, called the "dwell time," excess penetrant on the surface is removed and a developer applied

RADIOGRAPHIC TESTING

In Radiography Testing the test-part is placed between the radiation source and film (or detector). The material density and thickness differences of the test-part will attenuate (i.e. reduce) the penetrating radiation through interaction processes involving scattering and/or absorption. The differences in absorption are then recorded on film(s) or through an electronic means.

VISUAL TESTING

Visual Inspection or Visual Testing (VT) requires line-of-sight contact with the portion of the specimen to be inspected, adequate illumination of the test specimen, a thorough understanding of the nature and origin of discontinuities and potential defects within the test object, and familiarity with the specifications controlling the inspection process. Unless the specimen cannot be examined visually, visual testing should be the first part of any NDT examination. Visual testing presents several real advantages: simplicity, rapidity, low cost, minimal training and equipment requirements, and the ability to be performed while the specimen is being used or processed.

EDDY CURRENT TESTING

Eddy Current inspection (ET) is one of several NDT methods that use the principal of electromagnetism as the basis for conducting examinations. Eddy current testing equipment performs three basic functions: generating, receiving, and displaying. The generating portion of the unit provides an alternating current to the test coil creating eddy currents through a process called electromagnetic induction