Non destructive testing

NDT Service offers the following methods of nondestructive examinations:

Magnetic particle examination method (MT)

This method can be applied to detect cracks and other defects from the surface or near the surface of ferromagnetic materials. The sensitivity of the method is at its maximum for the surface defects and rapidly decreases with the depth. Typical discontinuities detectable by this method are: cracks, undercuts, lack of fusion, laminate defects and porosity.

Liquid penetrant examination method (PT)

This method is efficient in detecting defects at the surface of porous metals and other materials. Typical defects detected by this method are: cracks, undercuts, lack of fusion, laminate defects and porosity.

Examination with penetrating radiation method (RT)

This method is performed by using radiation emitted by closed sources and / or X-ray generators. It has a high level of efficiency in controlling the structure of materials and welded joints. By this method we obtain a control sample (radiographic film) which can be permanently consulted. The only disadvantage of this method is the difficulty of ensuring the radiation protection rules in work areas.

Ultrasonic examination method (UT)

This method is used to control forgings, castings, laminates, pipes, plates and welded joints. By using this method we can find any kind of defects. Ultrasonic examination method is one of the most safe and effective of the non-destructive examination methods, with a high degree of precision in terms of “diagnosing” objects.

Ultrasonic thickness measurements

Ultrasonic thickness measurements are applicable to any type of metallic material that provides ultrasonic wave propagation with constant speed and also a reflection of ultrasonic beam from the surface positioned opposite the transducer. The measurement is made by direct contact of transducer with the metal, provided that the surface of the element to be measured is accessible at least on one side. This is achieved by using the dual crystal transducer with normal incidence. Both the direct reading instruments and the equipment for direct reading  accompanied by the type A presentation can be used.

Visual examination method (VT)

Visual examination is the direct or indirect visual check of the product or the areas to be examined. This examination is carried out directly or through the inspection equipment (borescopes, endoscope, etc.). The use of this method can help in taking proper decisions regarding the execution of the product. The examination can be applied before technological operations, during the production flow or at the end of the product execution. It is mainly used before any other NDT methods.