Liquid Penetrant Testing Insights

What is Liquid Penetrant Testing?

Liquid Penetrant Testing (LPT), also known as Dye Penetrant Inspection (DPI), is a widely used non-destructive testing (NDT) method to detect surface-breaking defects in non-porous materials. A visible or fluorescent dye is applied to the surface, allowed to dwell, and then excess penetrant is removed. A developer is then applied, which draws the penetrant out of any defects, making them visible to the inspector. It is commonly used to find cracks, porosity, laps, seams, and other surface flaws in metals, plastics, and ceramics.

Find organizations using Liquid Penetrant Testing on Sumble →

What other technologies are related to Liquid Penetrant Testing?

Liquid Penetrant Testing Competitor Technologies

Magnetic Particle Testing

Magnetic particle testing is a competing non-destructive testing method used to detect surface and near-surface flaws in ferromagnetic materials.

mentioned alongside Liquid Penetrant Testing in 37% (365) of relevant job posts

Ultrasonic Testing

Ultrasonic testing is a competing non-destructive testing method used to detect internal flaws and assess material properties, sometimes used when penetrant testing is not appropriate.

mentioned alongside Liquid Penetrant Testing in 20% (344) of relevant job posts

Radiographic Testing

Radiographic testing (RT) is an alternative non-destructive testing (NDT) method used for detecting internal flaws in materials. It can be used instead of penetrant testing, especially when subsurface defects need detection.

mentioned alongside Liquid Penetrant Testing in 20% (82) of relevant job posts

Eddy Current Testing

Eddy current testing is another NDT method that can detect surface and near-surface flaws, especially in conductive materials, and may be chosen over penetrant testing for certain applications.

mentioned alongside Liquid Penetrant Testing in 14% (68) of relevant job posts

Liquid Penetrant Testing Complementary Technologies

Visual Testing

Visual testing (VT) is often used to prepare for and supplement liquid penetrant testing (PT). VT can identify surface conditions that might affect PT results, and final inspection often includes visual verification.

mentioned alongside Liquid Penetrant Testing in 28% (107) of relevant job posts

Visual Inspection

Visual inspection can be used as pre-cleaning process and post-inspection process to verify penetrant results, making it complementary.

mentioned alongside Liquid Penetrant Testing in 21% (136) of relevant job posts