These are more complex tests that allow for a more specific assessment of the equipment, when necessary:
B-scan: a type of ultrasound test that allows for a graphical presentation of the results of a series of thickness measurements. It is a very effective technique, which is easy to handle and allows for quick interpretation of the results.
C-scan: also an ultrasound test that, unlike the B-scan, is automated and can be remotely controlled;
Industrial endoscopy: as the name suggests, endoscopy is a visual examination that accesses hard to reach places with limited access;
Iris: this is used to verify the pipes of heat exchangers and boilers, where thickness measurements are made by accessing the inside of the pipes;
Acoustic emission (AE): detects discontinuities through the different sound waves that the material emits when tension is applied to its structure. It is a very useful technique, because it does not interfere with the production process and can be conducted while the equipment is in operation.