It is relatively easy and low in demands. The equipment is used just for inspection of close or direct inaccessible areas, such as tanks, tubes and vessels. In some qualification systems, this method is not recognized as regular NDT, because it is “natural” activity. However, the great benefit is a transparency and understandable reported information. We can measure defect dimensions. Data storage is simple via photo.
VT can be applied everywhere, including object with elevated temperature (it is contactless) or risk of explosion (direct observation without any appliance). Potential users are weld workshops, assembly workplaces, inspectors with high productivity demands. Knowledge is useful also for engineers, which “need to look” on the objects.