RTD™ radiographic inspection

Radiographic inspection makes it possible to detect defects under the surface of materials, like in welds or structures. X-rays and gamma rays are used to produce a radiography of the inspected object. Internal and external defects, such as changes in thickness and cracks, are recorded on a film that can be interpreted by trained personnel.

Scope of use

In principle, all types of materials can be irradiated by means of radiography. Depending on the type and the thickness of the material, an optimal selection will be made for the inspection equipment and parameters to be used. Plastics will demand a different method of irradiation and different inspection equipment than a thick-walled steel vessel for example.

The shape or the dimensions of the object to be inspected do not generally limit radiographic inspection. The method can also be used well in the field or in (production) companies.

On special request it is possible to develop and interpret radiographic images on-site using mobile darkrooms.


RTD has a large quantity of equipment at its disposal for irradiating various wall thicknesses. Steel up to 50 mm can be thoroughly irradiated using the standard X-ray equipment. Using the radioactive sources Iridium 192 and Cobalt 60 (gamma radiation) even steel thicknesses of up to 200 mm can be inspected.

RTD is able to apply radiographic inspection techniques in the following disciplines:


  • Film radiography

  • Digital radiography

  • Real time radiography

  • Flash radiography

  • PMI testing