Français
 

Non Destructive Testing (NDT)

Principle »

Non-destructive Testing (NDT) is a set of methods to characterize the state of integrity of structures or materials, without damaging them, either during production or in use, either as part of maintenance operation.

Techniques

  • Radiographic Testing
  • Magnetic Particle Inspection
  • Dye Penetrant Inspection
  • Ultrasonic Testing

Scope of application

These methods are widely used for:

  • The oil industry (pipelines, tubes, bars, welds, tanks)
  • The shipping industry (control of shells)
  • Aeronautics (beams, aircraft wings, many engine parts, landing gear, etc.)
  • The energy industry (reactors, boilers, piping, turbines, etc.)
  • The railway manufacturing and maintenance including security organs (axles, wheels, trucks)

Why TIC

  • Highly skilled and certified inspectors (COTEND, COFREND, ASNT, COSAC, RTFI, Competent person in Radioprotection…)
  • NDT activities supervised and approved by Level III certified experts.
  • Over 20 years experience in local and international major projects.
  • Wide range of NDT equipment from internationally reconized suppliers (Projectors (Selenium, Iridium), X Ray Generators, Scar System, Pipeline Crawlers, MPI yokes, Ultraviolet projectors, Flaw detectors equipment, Wall thickness measurement equipment….)
  • Tic is accredited by TUNAC in the NDT Ultrasonic testing

Radiographic Testing

This technique uses an industrial radiography source of radiation (gamma or X).
The technique involves placing the work piece between the radiation source and a photographic film cassette contained in a flexible or rigid. After an exposure time depending on the nature and thickness of the material radiographed, the film is developed and reveals the defects that may exist within the room.
The application areas are numerous (boiler, foundry, oil industry, shipbuilding).

Magnetic Particle Inspection

The magnetic particle is a nondestructive technique of creating an intense magnetic flux at the surface of a ferromagnetic material.

In the presence of a defect in its way , the magnetic flux is deflected and creates a leak that, drawing the particles (colored or fluorescent) of a product developer, provides a particular signature characteristic of the defect.

Dye Penetrant Inspection

This is a method to reveal the presence of discontinuities open to the surface of metal parts, mainly, but also ceramic. It is to baste (by immersion or by electrostatic spraying, sometimes but rarely, brush) the target with a fluorescent liquid or colored in red, which enters the discontinuities.

After cleaning the target and a developer is applied, the liquid remained in the cracks, will reveal them.

Ultrasonic Testing

Ultrasonic inspection is based on the transmission, reflection and absorption of ultrasonic wave propagating in the test piece.

The emitted wave train is reflected from the defects then back to the translator (who often plays the role of transmitter and receiver). The interpretation of the signals used to set the default and to define its relative dimensions.