Penetrant testing

Penetrant testing is one of the first widely accepted non-destructive testing method. The very first techniques used oil and chalk while today many new techniques have been developed which allow very high sensitivity. Penetrant testing method is based upon capillary action.

The penetrant is applied on the object, then after adequate penetration time the excess penetrant is removed and a developer is applied. The developer helps to draw the penetrant out of the flaws so that an invisible indication becomes visible.

This method is used for:

  • testing surfaces for cracks, porosity and other imperfections
  • testing non bonding edges on multilayer slide bearings
  • testing the sliding surface on slide bearings
  • testing materials that don’t have magnetic properties such as stainless steel, ceramics, plastics, glass, etc
  • testing O rings on steam turbine valves
  • testing joints and walls for leaks

Wide application of this method is possible due to it’s ease of use and the ability to work on-the-spot. The ability to use this testing method on nonmetallic materials such as ceramics, plastics, and glass ensures that this method is future-proof.

Other methods

Radiographic testing

Radiography is a process of recording inner and outer defects in three-dimensional objects on a two-dimensional film plane.

Ultrasonic testing

Ultrasonic testing is based on the fact that solid materials are good at carrying sound waves.

PAUT- Phased array ultrasonic testing

An advanced method of ultrasonic testing that has applications in industrial nondestructive testing.

Magnetic testing

With the use of magnetic flux it is possible to find flaws on the surface of the object as well as directly below the surface.

Penetrant testing

Penetrant testing is one of the first widely accepted non-destructive testing method.

Visual inspection

Visual inspection is the oldest and the most common non-destructive testing method.



Welder certification is done following the latest European standards and their requirements for the following welding processes: MIG, MAG, REL, TIG, gas welding


Welder training is done according to our own program in our welding school in Sesvete using the following methods: REL, MAG, MIG, TIG, gas welding

Supervision and control

Supervision and control over the execution of welding works.

Non-destructive testing

Visual testing (VT), penetrant testing (PT), magnetic testing (MT), ultrasonic testing (UT), phased array ultrasonic testing (PAUT)…

Creating technical documentation for welding

WPS list, welding procedure qualification record (WPQR), welding technology

Mechanical calculation

In cooperation with our partners we offer: static calculation of construction, dynamic calculation of construction etc.