Non-destructive testing of products

Non-destructive testing of products

Why should you test products with us?

The scope and variety of the testing of raw materials and other materials in particular branches and fields, for instance structural and building materials, weldments, testing of games and toys or testing of other semi-finished products or finished products. A number of these tests require special equipment and experience such as running and evaluating the tests. LL-C (Certification) Czech Republic s.r.o. is capable of testing and evaluating a wide range of such products, within the provision of testing services, which are tested in accordance with specified product testing standards by testing laboratories having high-quality equipment and qualified staff.

Visual method

is classified as a method for the purpose of exposing surface defects of materials (especially with welds, products, castings and forged pieces). Visual inspection is considered the cheapest identification of critical spots surface non-integrities (cracks, corrosion, porosity, exposed shrink holes and other defects). The visual method mostly precedes another non-destructive method (PT, UT, MT, RT).

Capillary method

is perceived as a method of exposing surface defects of material (especially with welds, products, castings and forged pieces). Principles of the method are clear from its title - capillary action. On the basis of capillarity and wettability of penetrant (indicator of defects on the material surface) their colour difference from the basic material is used as the main identifier of the surface defect. The capillary method precedes other volumetric NDT methods (UT, RT).

Eddy current method

is a surface method for the purposes of testing electrically conductive materials. The eddy current method is most often used for exposing surface defects, it is however possible to identify also defects with the maximum depth of 10 25 mm on the outside of the material (depth depends on the kind of material).

Ultrasound method

is a volumetric non-destructive method used for identification of defects on the outside of the material, and used for identification of defects on the outside of the material, this methods allows to expose defects on the outside of metal and non-metal materials. Main types of checked products are especially metallurgical semi-finished products, castings, forged pieces, workpieces or weldments. The ultrasound method is focused not only on the identification of volumetric inner defects of material, surface defects of the type of cracks or duplications and also on the detection of the thickness of material (plates, tubes).

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