BS EN 462 : Part 3 : 1997- Non-destructive testing - Image quality of radiographs - Part 3: Image quality classes for ferrous metals
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This standard specifies the minimum image quality values to ensure a uniform radiographic quality. It applies to the two types of image quality indicator as detailed in EN 462-1 for wire type IQI and EN 462-2 for step/hole type IQI and for the two techniques described in EN 444. Values are specified for the two classes of radiographic technique specified in EN 444 and for ferrous metals.