LPI has various meanings in the Testing category. Discover the full forms, definitions, and usage contexts of LPI in Testing.
A type of nondestructive inspection that locates discontinuities that are open to the surface of a metal by first allowing a penetrating dye or fluorescent liquid to infiltrate the discontinuity, remove the excess penetrant and then apply a developing agent that causes the penetrant to seep back out of the discontinuity and register as an indiocation. Liquid penetrant inspection is suitable for both ferrous and nonferrous materials but is limited to the detection of open surface discontinuities in nonporous solids.
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