The Objective

Radiographic Testing is a Non-Destructive Testing method that uses X-ray and Gamma-ray for detecting internal imperfections, for measuring wall-thickness and for the detection of corrosion.

The Solution

Radiographic Testing involves the process where radioactive rays are directed at the object to be inspected, to pass through it and the resulting image is captured on a film. This film is in-turn processed and image displayed as a sequence of grey shades between black and white.

With Radiographic Testing the material is exposed to a homogenous ray from a radioactive isotope or an X-ray tube, while a negative film is positioned behind the material to be examined. After development of the film, thickness and density differences (i.e. material imperfections) will show as blackness differences. Acceptance criteria define whether or not the indication is non-acceptable (a defect) or not.

Application Range

Radiographic Testing encompasses sources such as X-rays, Gamma rays as well as newer methods such as real time radiography, computed radiography (CR) and computed tomography (CT). Not one solution can meet all radiographic needs, the right choice depends upon the application. Radiographic Testing is mainly used to test new welds and verify compliance but it is also used to detect corrosion in life plants.