It is used to detect open discontinuities on the surface of the material by using liquids with low surface tension (high wetting ability). Errors that lie below the surface to be checked or whose opening is closed for any reason cannot be detected by this method. Furthermore, the fact that the inspection piece has a very porous structure eliminates the possibility of fixation by this method.
The method is carried out using product combinations consisting of penetrant intermediate cleaner and developer. The principle of the method is that the penetrant liquid penetrates open discontinuity to the surface, the excess penetrant is removed from the surface and the visible penetrating liquid penetrates through the developer discontinuity.
Penetrant testing (PT), which is one of the non-destructive testing methods, is an inspection method that is made visible with the help of a number of chemical substances, especially in pressure vessels, defects in material and welding surfaces. This method is very practical and useful method. Penetrant inspection method only detects defects that occur on the outer surfaces of the material. Therefore, it is not appropriate to use this method for porous materials. The first step in the penetrant inspection process is pre-cleaning. Foreign materials such as oil, dirt and rust on the surface of the material should be cleaned. Then the penetrant liquid is sprayed onto the cleaned surface of the material. In this way, cracks on the surface are filled. This red liquid (penetrant liquid) is then cleaned. In the final step, the material is inspected visually or under black light. Briefly, the liquid penetrant method is a non-destructive inspection method which makes discontinuities on the surface of the material visible. The basic principle of this method is that penetrating liquid, which is a fluid, penetrates into cracks in the surface of the material. The Regulation on Health and Safety Conditions in the Use of Work Equipment has been issued in order to regulate the minimum requirements for the health and safety of work equipment used in workplaces. Details of the Annex to the Regulation on Maintenance, Repair and Periodic Inspections (Annex 3) are provided.
Our company also provides penetrant inspection services within the framework of non-destructive inspection services. In these studies, relevant legal regulations, standards and test methods published by local and foreign organizations are complied with. A few standards are based on:
- TS EN ISO 5817 Welding - Steel, nickel, titanium and their alloys melting welded (not including bundle welding) - Quality levels for defects)
- TS EN ISO 3452-1 Non-destructive testing - Penetrant inspection - Part 1: General requirements
- TS EN ISO 3452-2 Non-destructive testing - Penetrant inspection - Section 2: Test of penetrants
- TS EN ISO 23277 Non-destructive testing of welds - Penetrant testing of welds - Acceptance levels
- TS EN 1371-1 Casting - Liquid penetrant inspection - Part 1: Sand, non-pressure and low pressure die casting
- TS EN 1371-2 Castings - Liquid penetrant inspection - Part 2: Precision castings
- TS EN 10228-2 Non-destructive testing of forged steels - Part 2:
