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 Magnetic Particle Testing    Magnetic Particle Testing (MPT), also known as Magnetic Particle Inspection, i.e. a nondestructive examination (NDE) technique used to detect surface and  subsurface diecounitinuties  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 magnetic particle test Is part of ASME SECTION V ARTICLE 7 requires the magnetic particle visible method (color contrast) be evaluated with a minimum light intensity of 100 footcandles on the part surface Advantages of the Magnetic Particle method of Non-Destructive Examination are: It is quick and relatively uncomplicated. It gives immediate indications of defects. It shows surface and near surface defects, and these are the most serious ones as they concentrate stresses. Magnetic Particle Testing (MT), also referred to as Magnetic Particl...

  Dye Penetration Test Non-Destructive Dye Penetration Test Non-Destructive Inspection methods. Also, known as the Liquid penetration test, the Dye penetrant test is widely used to detect surface discontinuities like cracks, fractures, porosity, grinding defects, incomplete fusion, and flaws in joints. This test or inspection method is serving as an aid in finding irregularities in aluminum, cast iron, brass, steel and stainless steel, copper, magnesium, carbides, stellite, ceramics, and even certain plastic materials. So, the dye penetration test is suitable for both ferrous and non-ferrous materials and is highly economical as compared to the other non-destructive inspection methods. The Dye Penetration test works on the  principal of of capillary action. A liquid with low surface tension can penetrate into a clean and dry surface if the liquid is kept for a certain time called “Dwell Time”. Liquid Penetrant has to be applied over the test specimen/object by dipping, sprayin...