Electromagnetic waves, which have high energy in radiographic testing (radiographic examination), can penetrate many materials. Radiation penetrating a certain volume of material also affects the photosensitive films placed on the opposite side of the material. The image of the internal structure of the material through which the radiation passes appears while bathing the affected films.

This image formed in the film is formed due to voids in the material or thickness / density. This visualization of the material volume structure is called the radiographic examination method. If a detector is placed on the opposite side of the material instead of a film, and the transmitted radiation is collected and transferred to a monitor, the imaging technique is called radioscopy.

Radiographic testing technically will not be wrongly named as (X –RAY) X radiation devices, (GAMMA-RAY) gamma radiation (Ir 192 and Se 75) isotopes of all kinds of welded joints, forgings, casting and x-ray films of cast parts. .br />
Advantage of radiographic test; It can be used for detection of expected volumetric and surface defects in all metallic or non-metallic materials.

Limitations of radiographic examination; The thickness of the inspection part should not exceed certain values depending on the type of radiation source to be used. Suitable material thickness ranges for various radiation sources are given in application standards. It can be applied to all kinds of materials except thickness limitation. NDT - The training and experience of the radiographic inspection operator is very important. Both surfaces of the inspection part should be accessible. The hardware to be used for inspection is quite expensive compared to other methods. Mostly, it requires careful work on radiation and environmental safety.

General Standards

EN ISO 5579 - Non-destructive testing - General principles for radiographic examination of metallic materials with film and X- or gamma rays
EN ISO 19232-1 - Non-destructive inspection - Image quality of radiographs - Part 1: Image quality indicators (wire type) - Determination of image quality value
EN ISO 19232-2 - Non-destructive inspection - Image quality of radiographs - Part 2: Image quality indicators (stepwise / hole type) - Determination of image quality value
EN ISO 19232-3 - Non-destructive testing - Image quality of radiographs - Part 3: Image quality classes
EN ISO 19232-4 - Non-destructive testing - Image quality of radiographs - Part 4: Image quality values and evaluation of image quality charts by experiment
EN ISO 19232-5 - Non-destructive testing - Image quality of radiographs - Part 5: Image quality indicators (Double wire type) - Determination of the total half-shadow value
EN 1330-3 - Non-destructive testing - Terms and definitions - Part 3: Terms and definitions used in industrial radiographic inspection