A Discussion on the Radiographic Quality Levels Specified in ASTM E1742—2008

On the basis of the fundamental theory of radiography, a discussion was made about the radiographic quality levels specified in ASTM E1742—2008. The comparison was made of the image quality requirements specified by ASTM E1742 and ISO 19232-3. The results showed that the specified requirements based on ASTM E1025 for radiographic quality levels equivalent could not be suited to all specimen thicknesses. The analysis revealed that the specified requirements in ASTM E1742—2008 were not compatible with the technical system of industrial radiography.