Radiography Testing

Radiography Testing (RT), or industrial radiography, is a non-destructive testing (NDT) method of inspecting the quality and integrity of materials for hidden flaws by using the ability of short wavelength electromagnetic radiation (high energy photons) to penetrate various materials. Commonly, RT is performed using two different sources of radiation which are X-ray and Gamma ray. The choice of radiation sources and their strength depends on a variety of factors including size of the component and the material thickness.

Nusantara Technologies Sdn Bhd (NUSATEK) offers a full range of industrial radiographic equipment and techniques for almost all industries related to oil and gas, aerospace and power generation. We will work with you to identify the most appropriate method and technique to ensure optimum performance, accuracy and cost-effectiveness for your applications or products.

Our range of capabilities including examining various type of steel product such as welding joints, casting products, components, machined products, raw materials and structures.

The advantages of radiography testing are as follows:

  • Provide permanent visual image of the test object.
  • The results of inspection can be reviewed at any time.
  • Applicable to almost all materials.
  • Provide internal nature of a material.
  • Cost-effective.


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     Basic Principal

    Radiography is a process of introducing penetrating radiation such as X-rays or gamma-ray into materials to be tested. The differential absorption of penetration by the part being tested will form an image that is recorded on a radiographic film.

    There are three basic elements of radiography testing:

    • A radiation source (X-Rays or Gamma Rays).
    • Recording medium (film).
    • Object (Test specimen)


    The basic principle of radiographic inspection is when penetrating radiation is passed through a solid object, onto a photographic film, resulting in an image of the object's internal structure being deposited on the film. The amount of energy absorbed by the object depends on its thickness and density. Energy not absorbed by the object will cause exposure of the radiographic film. These areas will be dark when the film is developed. Areas of the film exposed to less energy remain lighter. Therefore, areas of the object where the thickness has been changed by discontinuities, such as porosity or cracks, will appear as dark outlines on the film. Inclusions of low density, such as slag, will appear as dark areas on the film while inclusions of high density, such as tungsten, will appear as light areas. All discontinuities are detected by viewing the shape and variation in density of the processed film.


    Inspection of products:

    • Welding
    • Casting
    • Machining / Component