Making sure your equipment remains properly calibrated is essential to achieving reliable results, no matter what your application. It is not always easy to figure out when your equipment needs calibration. Here are a few guidelines to help you make that determination:
Liquid penetrant testing, sometimes referred to as penetrant testing, dye penetrant testing or LT, is a method used to test for cracks and other surface defects in non-porous materials like ceramics, metals or plastics, which does not result in destruction of the material being tested.
Non-destructive testing has been used for more than a century, and recognized by a wide range of industries as a cost-effective way of maintaining quality and safety standards without compromising existing components or structures. Ultrasound, electromagnetic conduction (eddy testing), magnetic particle testing and liquid penetrant testing all find their roots in the 19th century (and maybe earlier), with the latter being used by the railroad industry beginning in the 1880s.
Although there are other methods of non-destructive testing, most industries rely on the following four techniques:
