How Radiographic Testing (RT) Works
Radiographic testing, also called X-ray inspection, is an imaging method in non-destructive material testing. Using an X-ray tube or an isotopic source, the density and homogeneity of a component are depicted on an X-ray film or digital detector. Variations in material thickness or density create brightness contrasts, allowing even fine cracks and volumetric defects to be detected.
Image quality indicators (IQIs) are included to determine image quality. These allow an objective assessment of contrast and resolution. Radiographic testing is a standard method especially for safety-relevant components such as welds (EN 1435) and castings (EN 12681, EN 444). It enables reliable detection of volumetric defects and thus significantly contributes to quality assurance.
We offer both stationary and mobile radiographic testing with modern equipment and isotopic sources, adapting the method flexibly to the material, component size, and testing task.
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Step 1 – Preparation and Positioning
The component is cleaned and precisely aligned together with the X-ray source and detection medium (film or digital detector). This ensures uniform irradiation of the entire test area.
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Step 2 – Irradiation
The X-ray radiation is applied in a defined dose to create an image of the internal structures of the component. Depending on the material and component thickness, different energy levels (up to 300 kV) or isotopic sources such as Iridium 192 or Selenium 75 are used.
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Step 3 – Image Capture and Evaluation
The resulting radiographic image is recorded either on X-ray film or with digital detectors. Qualified personnel then analyze the image and identify possible irregularities based on contrast and density differences.
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Step 4 – Documentation and Quality Assurance
All results are thoroughly documented and validated with image quality indicators (IQIs) if necessary. These proofs serve as the basis for quality assurance and the release of safety-relevant components.
- Digital Radiography (DR) – fast, high-resolution digital imaging with immediate evaluation
- Film Radiography – proven classical method using X-ray film for permanent archiving
Radiographic testing is one of the most precise methods for detecting material defects and makes a decisive contribution to the safety and durability of components.