Non-destructive testing has given businesses many ways to effectively test products for defects to ensure that they are in optimal condition for use. Unfortunately, these processes do have a few limitations, one such limitation being thickness. Here are a few non-destructive testing methods with thickness limitations:
Magnetic particle testing
Magnetic particle testing is an effective method when it comes to testing for surface and subsurface defects. This form of testing can be used on thick materials; however, if these materials have a thick layer of paint or other coating on its surface, this method cannot be used.
Liquid penetrant testing
Liquid penetrant testing is a very affordable method of non-destructive testing. This method is ideally used on non-porous materials to test them for various surface defects such as cracks, porosity, leaks and more. If the defects in question cannot be reached from the surface of the materials, this method of non-destructive testing is not effective. This means that liquid penetrant testing is not ideal for thicker materials that are likely to have internal defects.
Visual inspection is a form of non-destructive testing that is used to detect defects on the surface of a product that are visible to the eye. This technique is useful to start the testing process; however, it needs to be followed up with the use of a non-destructive testing method that can detect defects deeper in the material. This is due to the fact that visual inspection does not allow individuals to detect any defects below the surface of the material.