LPT in Detail

Liquid Penetrant Testing (LPT), also known as Dye Penetrant Inspection (DPI), is an effective and economical non-destructive testing (NDT) method for detecting surface-breaking discontinuities in solid, non-porous materials. It is especially useful for revealing hairline cracks, fatigue fractures, and other surface defects on components where safety and integrity are paramount — such as welds, castings, and machined parts.

At 2R Inspection, we offer both visible and fluorescent LPT methods based on the specific application, material type, and inspection environment. Our certified inspectors follow standards such as ASTM E165 and ISO 3452 to ensure reliable and repeatable results. The process involves surface preparation, application of penetrant, excess removal, developer application, and inspection under appropriate lighting conditions. Whether part of quality control in manufacturing or preventive maintenance in heavy industry, our LPT services help clients detect flaws early, improve product safety, and comply with regulatory and contractual requirements. With 2R Inspection, your components undergo rigorous surface integrity checks — ensuring they perform reliably in their intended applications.