Liquid Penetrant Inspection (LPI) - Aberdeen NDE Centre

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Liquid Penetrant Inspection (LPI)

Liquid penetrant inspection (LPI) also called Dye penetrant inspection (DPI) or penetrant testing (PT), is a widely applied and low-cost inspection method used to locate surface-breaking defects in all non-porous materials (metals, plastics, or ceramics). The penetrant may be applied to all non-ferrous materials. LPI is used to detect casting, welds and forging defects, cracks, and leaks in new products, and fatigue cracks on in-service components. Surfaces of inspection must be properly cleaned prior to LPI methods applied.

LPI is based upon capillary action, where low surface tension fluid penetrates into clean and dry surface-breaking discontinuities. Penetrant may be applied to the test component by dipping, spraying, or brushing. After adequate penetration time has been allowed, the excess penetrant is removed; a developer may be applied by spraying, dipping, flooding and dusting. The developer assists to draw the penetrant out of the flaw where an indication becomes visible to the inspector. Inspection is performed under ultraviolet or white light, depending upon the type of dye used - fluorescent or non-fluorescent (visible).

Available Courses:

Level 1 SNT
Course Title	Days	Booking Ref
INITIAL - FULL COURSE & EXAMINATION	3	ANC-BR-PT-001
RECERTIFICATION - EXAM ON CURRENT CERTIFICATION	1	ANC-BR-PT-002
RE-EXAMINATION - EXAM ON EXPIRED CERTIFICATION	1	ANC-BR-PT-003
RESIT - PART EXAMINATION THEORY/PRACTICAL	N/A	ANC-BR-PT-004

Level 2 SNT
Course Title	Days	Booking Ref
INITIAL - FULL COURSE & EXAMINATION	3	ANC-BR-PT-005
RECERTIFICATION - EXAM ON CURRENT CERTIFICATION	1	ANC-BR-PT-006
RE-EXAMINATION - EXAM ON EXPIRED CERTIFICATION	1	ANC-BR-PT-007
RESIT - PART EXAMINATION THEORY/PRACTICAL	N/A	ANC-BR-PT-008