COURSE NDT TRAINING IN CHENNAI -NDT CENTRAL GOVT. APPROVED NDT INSTITUTE IN CHENNAI
NON DESTRUCTIVE TESTING CENTRAL GOVT APPROVED NDT INSTITUTE IN CHENNAI
NDT Training institute in chennai is accredited by the central government approved Training School Programme. All our training courses are accredited by the central government approved of Non Destructive Testing . Our courses are based heavily on practical exercises, which when combined with the recording, reporting and answering of quizzes, results in the understanding of a specific syllabus segment
MAGNETIC PARTICLE TESTING
Magnetic Particle Inspection involves the magnetisation of a component, followed by the application of ferromagnetic particles. The particles align along discontinuities in the surface, or shallow sub-surface discontinuities. This method is used to test welds, castings, and forgings for surface or subsurface defects; however it can only be used on ferromagnetic metals.
LIQUID PENETRANT TESTING
This method involves applying a visible or fluorescent dye to the surface. The dye enters the discontinuities via capillary action. The method can be applied to any non-absorbent material with uncoated surfaces.
RADIOGRAPHIC TESTING
This method consists of radiographic film being placed under a sample. The sample is then exposed to radiation; the radiation passes through the sample, and exposes the film. Discontinuities in the sample affect the exposure of the film. Most materials can be tested by Radiographic inspection, e.g. welds, castings, composites etc. Radiographic testing provides a permanent record and provides a high sensitivity of testing.
VISUAL TESTING
Visual testing is a Non-Destructive Testing method by which reflected or transmitted light from a test object is imaged with a light sensitive device (e.g. the human eye!).
EDDY CURRENT TESTING
When a magnetic field cuts through metal, a current is induced. If a magnetic field cuts a wire in a closed circuit, a current is induced round the circuit. However if a magnetic field cuts through a sample of metal that is not connected to a circuit, an 'Eddy Current' is produced. This Eddy Current is localised in the metal, and has a flow pattern. The flow pattern is disturbed by discontinuities from the surface to a shallow depth of penetration. The method is quick and very sensitive. No contact with the metal is required. All metals may be subject to this form of testing.
ULTRASONIC TESTING
High frequency sound pulses are emitted from a transducer above a sample. The sound waves propagate through the sample, and reflect at interfaces. The reflected waves are monitored using a detector above the sample. The thickness of the sample, and the depth and type of flaw can be ascertained using this method. The method can be applied to most materials if sound transmission is good. Quick high sensitive results are obtained.