MT - Magnetic Particle Testing
Magnetic Particle Testing (MT), also referred to as Magnetic Particle Inspection, is a non-destructive test (NDT) technique used to detect surface and slightly subsurface flaws in most ferromagnetic materials such as iron, nickel, and cobalt, and some of their alloys. Because it does not necessitate the degree of surface preparation required by other nondestructive test methods, conducting MT is relatively fast and easy. This has made it one of the more commonly utilized NDT techniques. MT can be applied in both visible and florescent applications.
PT - Dye Penetrant Testing
Liquid Penetrant Examination (LPE), also referred to as penetrant testing (PT), liquid penetrant testing (LP), and dye penetrant testing (DP), is a non-destructive test (NDT) method that utilizes colored dye to reveal surface flaws on parts and equipment which might not otherwise be visible. The technique works via the principle of “capillary action,” a process where a liquid flows into a narrow space without help from gravity. Because it is one of the easiest and least expensive NDT techniques to perform, PT is one of the most commonly used inspection techniques in many industries, including oil and gas. PT requires additional surface preparation and drying time when compared to MT.