Penetrant Testing (PT), also known as Liquid Penetrant Testing (LPT) or Dye Penetrant Inspection (DPI), is a widely used Non-Destructive Testing (NDT) method for detecting surface-breaking defects in non-porous materials. It is one of the simplest, most economical, and highly sensitive inspection techniques used in industries such as oil & gas, petrochemical, aerospace, power plants, fabrication, automotive, and manufacturing.

Penetrant Testing (PT) is a highly effective and economical NDT method for detecting very fine surface defects in metallic and non-metallic non-porous materials. Due to its simplicity, portability, and high sensitivity, PT remains one of the most widely used inspection techniques for quality control, fabrication inspection, maintenance, and in-service examinations across various industries.