Image quality indicator
An image quality indicator (IQI) is a standardized test object with wires or hole plates that is placed on parts during radiographic testing. It checks the image quality and detail detectability on radiographs.
Physical-Chemical Mechanism
An image quality indicator (IQI) consists of materials with different densities, such as wires or hole plates. These are placed on a part and radiographed. The different densities reflect radiation differently, resulting in visible patterns on the radiograph.
Metallurgical Relevance & Welding Risks
Image quality testing is crucial for quality assurance in fabrication. A poor test object can lead to inaccurate or missing results, causing misunderstandings and potential defects in the part. This can lead to safety risks and additional costs.
Workshop Practice & Action Guidelines
Always use a qualified image quality indicator that meets the standard (e.g., ASME or EN). Make sure it is correctly placed and radiographed. Regularly check the functionality of the test object and compare results with reference images. For unclear results, contact a qualified inspector.