Liquid Penetrant Testing (PT)

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Principle:

Liquid Penetrant Testing (PT) is used to detect surface-breaking defects in non-porous materials. A liquid penetrant is applied to the surface, allowed to seep into defects, and then removed. A developer is applied to draw the penetrant out, making defects visible under normal or UV light.

Applications:

Inspection of welds, castings, and machined parts
Detection of cracks, laps, and porosity in metals, plastics, and ceramics
Used in industries such as aerospace, automotive, structural fabrication, etc.

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