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Defectoscope research, ultrasonic control


Non-destructive testing methods are a group of research analysis, which provide information about the material properties of the object without depriving its utilitarian values. The overriding aim of the pro-preparatory studies NDT is above all the detection and assessment of defects having the nature of the material discontinuities. Application of non-destructive indicators is relating to justify primarily safety considerations and the economics of not-seen an accident. The more responsible object, the more severe are the effects of sudden failure.
The company ZMP holds a certificate of a subcontractor of the Polish Office of Technical Inspection. We have the ability to perform research using the method of ultrasonic and magnetic testing in the repair and modernization of equipment in subject of technical inspection. Modern equipment and years of experience acquired during the execution of service on many technical objects let us realize the basic objective of non-destructive testing, which is to provide information about the state of material, equipment, installation or building in various stages of their life ranging from manufacturing, through assembly, and ending with the exploitation.


The method uses a magnetic-particles scattering phenomena, magnetic field or magnetic permeability in the locations of the defects. Using the MT method we can successfully detected any defects in components made mainly of ferromagnetic materials, which are all constructional steel made with the exception of high-alloy steels (austenitic).


MT method is used mainly in research on the quality of different types of welds (including the fillet weld). Tests of this method can be regarded as independent or as a pre-examination before ultrasonic testing.


Ultrasonic testing uses the accompanying phenomenon to the propagation of ultrasonic waves in materials. This is the best known and widely used method of NDT group. The technique of ultrasonic testing is used mainly to detect material discontinuities, which are located deep under the surface of the material. An additional advantage of these studies is the possibility of evaluating and sizing of detected defects.


Because of the concentration of our business in the area of rotary drum's and paper machine's service, we are specializing mainly in the non destructive testing of their components. Carrying out comprehensive tests of rotary drums' elements, we can determine condition of elements material, whose proper work has a decisive influence on the failure-free operation of the object. The tests are executed on: open gear components, shafts, rollers and live rings' raceways. We also carry out ultrasonic thickness measurements of shell plate segments determining its degree of wear with possibility of additional discovery of sheet's delamination.
For studies of paper machine's elements we check mainly the status of elements like cylinder / roller, which during operation are exposed to significant loads. Investigations are mainly focused on: pins, heads and bolts linking heads with cylinder / shaft shell. We measure also the thickness of the cylindrical part made of casted iron. We also carry out studies of shafts of rotating machinery such as fans, pumps, crushers. With regard to other technical facilities, we execute studies of shafts of various types of conveyors; popular are also tests of the welding quality and ultrasonic measurements of pipelines wall thickness.

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