Penetrant testing principle and advantages
Penetrant Testing is one of the effective method for detecting surface flaws,. It can be used on Metals, non-metals, plastics, ceramics & Glass. Not suitable for Porous materials such as wood, bricks, concrete, & other non graded castings, sponge Qualification of Examination Personel Able to read a Jaeger Type No. 2 Standard Chart at a distance of not less than 12 in. (300 mm), Should be capable of distinguishing and differentiating contrast between colors used. These requirements shall be checked annually. Should clear the Examinations with percentage stated in ASNT SNT-TC-1A Basic Principle Capillary Action – Low surface tension fluid( dye) penetrates in to clean and dry defects open to the surface. Advantages of PT High sensitivity to small surface discontinuities. Vast application -metallic and nonmetallic, magnetic and nonmagnetic, and conductive and nonconductive materials may be inspected. Large areas and large volumes of parts/materia...