Industrial Radiography

Radiography is the most widely used NDT method and is applied to detect internal defects in various materials. In this method, rays (X or Gamma rays) emanating from a radiation source pass through the test material and reach the film placed on the opposite surface of the material. The intensity of the rays passing through the material varies according to the discontinuities in the material and the thickness of the part; therefore, regions irradiated at different rates are formed on the film. After the development of the film, the darkening at different rates that occur on the film creates the leech of the object and discontinuities in the film. In this method, since discontinuities in the direction parallel to the radiation beam can be detected optimally, it requires knowledge and experience about the geometry of the inspection piece or the characteristic of the expected defect.

Our company specializes in steel, aluminum, copper, titanium, stainless steels, etc., such as welding seams, forging and casting. It carries out studies of imaging materials with our X-Ray and Gamma-Ray devices, evaluating and reporting the results.

 

At the order stage, the shooting technique is decided by our Radiographic Inspection Level 3 specialist according to the customer's demands, technical specifications and international standards (ASME, EN, ISO, ASTM, API etc.).

Advantages...

 

  • Permanent recording is achieved and comparison over time is possible.
  • Does not require calibration on the job site.
  • An excellent method for detecting internal discontinuities.
  • Beam direction is not affected by geometry.

Disadvantage...

 

  • Danger of exposure to high doses of radiation.
  • The depth of the defect cannot be determined (except in Stereo technique).
  • The film requires a high level of experience for the reviewer.
  • It is necessary that there are no humans or any other kind of living creature in the working area.
  • It is relatively expensive.
  • Limited penetration depth. (For example, Max. 100 mm for Ir-192)
  • Requires access from both sides of the tested item.
  • Electrical energy is needed for X-Ray devices.