Weld dye penetrate
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Dye penetrant inspection (DPI), also called liquid penetrate inspection (LPI) or penetrant testing LPI is used to detect casting, forging and welding surface defects such as hairline cracks, surface porosity, leaks in new products, and fatigue.
22 Aug Some handy tips for beginners who are new to visible dye penetrant testing or NDT pros who want an easy reference guide.
Description:In this technique low viscosity liquids are allowed to penetrate in the surface openings and after penetration, liquid is made to extract out again by means of some developers. That is why it is also known as Liquid Penetrant Examination for the evaluation of weldment. The examination includes five steps which are associated with the use of a cleaner, penetrant and developer. Cleaning Before Dye Penetrant Examination to start, the test surface is need to be cleaned with the help of wire brush or some old cloth using a suitable cleaner.