What is penetrant testing and when is it used?
Penetrant testing is an inexpensive and simple method for finding surface discontinuities. It is used on weldments, castings, forgings and products between production stages, and on products already in use.
What are the aims of the PT course?
- explain the basic principles of the penetrant method when carrying out a test
- carry out a test using solvent-removable, water-washable or post-emulsifiable penetrant
- write a clear and concise instruction and test report
Who is the PT course for?
All NDT personnel, inspectors and technicians who carry out or are responsible for the inspection of weldments, castings, forgings or products between production stages and of products already in use.
When is the next PT course?
Dates for 2026 under the education plan: Ljubljana 7–10 September 2026 (exam 14 September), Maribor 9–12 November 2026 (exam 16 November); the plan states 5 days, the theoretical part is delivered by distance learning through e-materials. Announced dates are on the page Course dates and exams.
Recertification under the 2026 plan: Maribor: preparation and exam 3 September 2026.
What does the syllabus cover?
The penetrant testing syllabus is in line with ISO/TS 25107. It covers, among others, the EN ISO 3452 series, EN ISO 23277 (acceptance levels for welds), EN 1371-1, EN 10228-2 and EN ISO 10893-4. The practical part covers detecting defects in welded joints, assessing indications on castings and forgings and preparing the report.

