ASNT-NDT LEVEL-II TRAINING


Non Destructive Testing

The field of Nondestructive Testing (NDT) is a very broad, that plays a critical role in
assuring that structural components and systems perform their function in a reliable and
cost effective fashion. NDT technicians and engineers define and implement tests that
locate and characterize material conditions and flaws that might otherwise cause
serious accidents such as, planes to crash, reactors to fail, trains to derail, pipelines to
burst, and a variety of troubling events.

These tests are performed in a manner that does not affect the future usefulness of the
object or material. In other words, NDT allows parts and materials to be inspected and
evaluated without damaging them. Because it allows inspection without interfering with
a product's final use, NDT provides an excellent balance between quality control and
cost effectiveness.

Uses of NDE

· Flaw Detection and Evaluation
· Leak Detection, Location Determination
· Dimensional Measurements
· Structure and Microstructure Characterization
· Estimation of Mechanical and Physical Properties
· Stress (Strain) and Dynamic Response Measurements
· Material Sorting and Chemical Composition Determination


NUTEC Invites The Application For The Following NDT LEVEL II Training Programs in Nagercoil
  • LIQUID PENETRANT TESTING
  • MAGNETIC PARTICLE TESTING
  • ULTRASONIC TESTING
  • RADIOGRAPHIC TESTING
  • RADIOGRAPHIC FILM INTERPRETATION
  • VISUAL TESTING
  • AS per ASNT SNT-TC-1A
NDT Level II Training & Certification Course-Liquid Penetrant Testing
A special dye is applied to the surface of the article to be tested. A suitable time interval allows it to soak into any surface defects. The surface is then freed from surplus dye and the dye in the crack revealed by either: applying a white powder developer into which the dye is absorbed producing a colour indication or,illuminating with ultra-violet light under which the dye fluoresces, that is, emitsvisible light. This must be done where normal lighting is subdued.


Liquid Penetrant Testing Course outline

  • Liquid Penetrant Testing Introduction
  • Principles of Liquid   Penetrant Testing
  • Equipment and Materials
  • Techniques
  • Interpretation Test Results
  • Quality  control of Penetrant Test Materials
  • Comparison and Selection of NDT Process
  • Safety Precautions

NDT Level II Training & Certification Course-Magnetic Particle Testing


The work is magnetised either by passing a current through it, or through a coil surrounding it. Defects on or near the surface disrupt the magnetic field (unless they are parallel to it). A magnetic particle fluid suspension is applied which concentrates around the defects. The work is viewed either directly or by ultra-violet light using a dye which fluoresces - i.e. emits visible light (this must be done where normal lighting is subdued). After testing, work may be demagnetised if required.

Magnetic Particle Testing Course Outline
  • Magnetic Particle Testing Introduction
  • Principle of Magnetic Particle Testing
  • Magnetic Particle Test Equipment
  • Mediums and Their preparation
  • Magnetic Particle Application
  • Classification of Discontinuities
  • Comparison and Selection of NDT Process
NDT Level II Training & Certification Course-Radiographic Testing


Gamma rays, similar to X-rays but of shorter wavelength, are emitted continuously from the isotope. It cannot be ‘switched off’ so when not in use, it is kept in a heavy storage container that absorbs radiation. They pass through the work to be inspected.Parts of the work presenting less obstruction to gamma rays, such as cavities or inclusions, allow increased exposure of the film. The film is developed to form a radiograph with cavities or inclusions indicated by darker images. Section thickness increases (such as weld) appear as less dense images.

X-rays are emitted from the tube and pass through the work to be inspected. Parts of the work presenting less obstruction to X-rays, such as cavities or inclusions,allow increased exposure of the film. The film is developed to form a radiograph with cavities or inclusions indicated by darker images. Section thickness increases(such as weld under-bead) appear as less dense images.
NDT Level II Training & Certification Course-Ultrasonic Testing


A pulse of electrical energy is fed to the probe in which a piezo-electric crystal converts it to mechanical vibrations at an ultrasonic frequency. The vibrations are transmitted (via a layer of grease to exclude the air) through the work. If they encounter a defect some are reflected back to the probe, where they regenerate an

electrical signal. A cathode ray tube trace, started when the original signal is sent,displays the reflected defect signal and from it time indicating distance from probe,and amplitude - indicating defect size, can be calculated.

Ultrasonic testing course outline

  • Ultrasonic Testing Introduction
  • Ultrasonic Testing Principles
  • Equipment
  • Ultrasonic Testing Techniques
  • Calibrating Testing units
  • Calibrating Transducers
  • Comparison and Selection of NDT Process.
Visual and Optical Testing (VT)

Visual testing is basic of all Non-Destructive Testing methods.Visual Examination can be an effective way to recognize surface imperfections that could adversely affect a part or component. Visual Examiners use knowledge of how a part is manufactured, the function of the human eye, lighting requirements, and precise measuring tools to evaluate materials. Computer controlled camera systems and optical aids such as borescopes may also be used to recognize and measure features of a component.

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