How are magnetic particle inspections classified?

Magnetic particle inspections are classified primarily based on the technique employed during the inspection process. This classification includes two main categories: surface inspections and subsurface inspections. Surface inspections focus on detecting surface-breaking defects, such as cracks or inclusions, that are easily identifiable when magnetic particles are applied to the surface of a test object. In contrast, subsurface inspections are used to identify defects that lie beneath the surface, which may not be readily visible without the use of specific techniques.

This classification is crucial in determining the appropriate procedures and equipment required for effective inspection, enabling inspectors to select the most suitable method based on the defect types they are assessing. Understanding this distinction allows for more targeted and efficient evaluations of materials and components in various industrial applications.