Ultrasonic testing

Ultrasonic material testing has been in use since the 1940’s since when many different aplications have been developed. Ultrasonic testing is based on the fact that solid materials are good at carrying sound waves. The effect that occurs when the borders of solid materials start to reflect sound waves is used to test material volume.

Ultrasonic testing and radiography are the only two methods for testing volume flaws. With the appropriate knowledge and by using modern techniques ultrasonic testing has become one of the best non-destructive testing methods.

Soundwave reflection doesn’t just occur on the outer borders of the material, it also occurs when the sound wave collides with the inner flaws of the material. With those kind of properties ultrasonic testing and radiography has become the most common method for testing the inner material flaws.

It’s worth mentioning that both methods, radiography and ultrasound, overlap in just one area of testing, while each method has it’s own advantages and disadvantages.

Some material flaws that can be revealed with ultrasonic testing are:

  • cracks (surface and subsurface)
  • inclusions and porosity
  • detaching layers on multilayer materials
  • wall thinning from corrosion and wear

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

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Mechanical calculation

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