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NDT Consultancy & Services


BIT (Best In Tech) NDT provides NDT Training and Certification Level-I / II as per ASNT: SNT-TC-1A written practice in the following methods:

Other courses offered

Best In Tech has developed a well devised training module, which has yielded success to BIT NDT-ians by step into successful career with major organisations worldwide including Indian corporate.

We are proud to mention that our NDT Level-II candidate has successfully cleared ASNT NDT Level-III examination in UT, MT, ET, RT and PT in his first appearance. We would also like to reveal the fact that many of our candidates have cleared ARAMCO examination in first appearance itself.

Training & Certifications

Qualification for Joining in Course:

Minimum Qualification: 12th standard
Others: Diploma, B.SC (Physics, Chemistry, Mathematics), B.E, A.I.M.E,

A brief detail of NDT Methods

Ultrasonic Testing :
Ultrasonic Testing method use beam of sound waves (vibrations) of short wavelength and high frequency, transmitted from a transducer and detected by the same or other transducers. Usually, simple transducers will produce the sound waves inside the material with or without contact in the specimen to be tested. The CRT screen shows the time base in the abscissa and the amplitude of the size of the flaw in the ordinate. Complex mutiprobe systems are also used with mechanical probe movement and digitization of signals, followed by computer interpretation are developing rapidly.

The echo will arise in the CRT if any discontinuities are present inside the material which is perpendicular to the sound propagation because of the reflection from the discontinuities due to the ACOUSTIC IMPEDENCE DIFFERENCE.


Liquid Penetrant Testing :
The Liquid Penetrant testing is a method for locating the surface discontinuities which is open to surface. Simply the colour contrast Penetrant or Fluorescent Penetrant is applied over the examining surface. Time is allowed for the Penetration of the Penetrant into the discontinuities due to the CAPILLARY ACTION. Succeeding the excess Penetrant removal from the surface, then the surface has to dry for applying the Dry developer. Proper developing time gives the output of the indication from the discontinuities by the Blotting process.

Liquid penetrant testing can be applied to any non-porous clean material, metallic or non-metallic, but is unsuitable for dirty or very rough surfaces. Penetrant can contain a dye to make the indication visible under white light, or a fluorescent material that fluoresces under suitable ultra-violet light. Fluorescent Penetrant is usually used when the maximum flaw sensitivity is required.

Magnetic Particle Testing :
The Magnetic Particle Inspection method of Non-Destructive testing is a method for locating surface and sub-surface discontinuities in ferromagnetic material. Initially the test object has to be magnetized by the magnetization force. The magnetic flux leakage will occurs if there is any deviation from the magnetic flux lines inside the testing object because of the PERMEABILITY DIFFERENCE. The discontinuity is detected by use of Dry or Wet ferromagnetic particles applied over the surface, because of the leakage field the ferromagnetic particles will concentrate. Also the defect can be identified only when the defect orientation is 45 to 90 degrees to the magnetic flux.

The visible method and also the fluorescent method are used for the sensitivity application.

Radiographic Testing :
Radiographic Examination is based on the exposure of the components on shorter wavelength electromagnetic radiations as X or gamma radiation. The electromagnetic radiation are produced with the help of the simple X -ray unit or Isotopes ( Ir-192, Co – 60, Cs – 137, etc..,). The radiations which are penetrated into the components are absorbed and that depends upon its density and thickness.

This variation in the transmitted radiation can be viewed by the photographic film or by the fluorescent screen with the principle of RADIATION ABSORPTION DIFFERENCE. This method is used to detect the internal discontinuities in the components.

Eddy Current Testing :
Eddy Current Testing is a method of Nondestructive testing which detect surface and subsurface discontinuities in the conductive material by the principle of ELECTRO MAGNETIC INDUCTION.

When an Alternating Current is passed through the coil, the magnetic field will induce around the coil. If the magnetic flux is cut by the conductive material Eddy Current will induce in the material. Induced Eddy Current produces the magnetic field which opposes the primary field. Thus changes the IMPEDANCE of the coil.

By monitoring the coil impedance, the electrical, Magnetic and Geometric properties of the material can be characterised.

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