Liquid penetrant testing is used to detect flaws that are open to the surface in materials such as metals, glass and other non-porous materials. The process works by capillary action which pulls the penetrant into the open flaw. Penetrants may be visible or fluorescent, water washable, solvent removable or post-emulsifiable in four sensitivity levels.It is more sensitive and easy NDT method having very low examination cost. It requires cleaner/remover, penetrant, developer.


  • This course provides detailed theoretical and practical information on all the commonly encountered     penetrant testing techniques. Candidates will have the opportunity to use the various techniques on      welds, castings and wrought products.
  • This course is orientated towards candidate NDT inspectors.


  • Introduction to the penetrant method
  • Principles of penetrant inspection
  • Penetrant inspection equipment
  • Performance checking
  • Defect detection and evaluation
  • Penetrant techniques
  • Relevant standards
  • Reporting method
  • Material technology
  • Assessment of discontinuities
  • Acquaintance with the relevant equipment (penetrants, solvents, developers, UV-A lamps, etc.)
  • Testing of several training samples with artificial and natural discontinuities
  • Location and assessment of discontinuities
  • Report