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  • Liquid Penetrant Testing

    LPI is widely applied as low cost inspection method used to locate surface breaking defects in all non-ferrous materials and ferrous materials; although for ferrous components magnetic particle inspection is often used. LPI is used to detect casting, forging & welding surface defects such as hairline cracks, surface porosity, leaks in new products and fatigue cracks on in-service components. We offer on-site liquid penetrant testing services using contrast or fluorescent penetrant for highly sensitive inspection. We offer on-site liquid penetrant inspection services. For detecting of surface breaking cracks in non-magnetic materials, we use both colour contrast and fluorescent penetrant for highly sensitive inspection.

    Applications:
    • It is used to inspect metals for surface defects
    • Weld discontinuities open to surface i.e. cracks, porosity and seams
    Advantages:
    • It can be used on a wide variety of materials: ferrous and nonferrous metals and alloys, fired ceramics, powdered-metal products, glass, and some types of organic materials
    • Portable, relatively inexpensive equipment
    • Expedient inspection results
    • Results are easily interpreted
    • Requires no electrical energy except for light source
    • Indications may be further examined visually
    • Adapted to volume processing permitted 100 percent surface inspection
    Limitations:
    • Surface films such as coatings, scale, and smeared metal mask or hide rejectable defects
    • Parts should be clean before and after inspection
    • Bleed out from porous surfaces can also mask indications
    • Remain in contact with body surfaces for extended periods, they may cause skin irritation