The nondestructive testing services deal with the characterization, measurement and detection of the materials defects (discontinuities). The defect is deviation from the form, size, appearance and structure of the prescribed technical documentation of a product. And sometimes, such a defect can have fatal consequences. If for example a gas pipe has a crack which is not detected by specialists, the house can blow up. It may seem dramatic, but things like that happen all the time.
Also, it is important to know that the experts from the nondestructive testing departments claim that the defects may appear in three common situations: in the drafting process of the material, during the process of manufacturing (forging, rolling, welding, heat treatment) or in during the operation, due to the complex demands for the materials. This is the reason why people should always look for good quality materials, instead of the cheapest ones.
In Dubai, for example, people are always interested in the quality of the materials which they use for their constructions. And there are various nondestructive ways of testing the materials. The most common methods used in Dubai are the visual testing – using instruments such as magnifying glass and microscopes, the penetrant testing and the magnetic testing. There are also other procedures such as the Eddy current testing, the acoustic emission testing, the infrared thermography – especially for the maintenance of the electrical installations and the ultrasounds testing.
In the recent years the techniques such as NDE (nondestructive evaluation) experienced an evolutionary path, particularly in well developed countries like the United Arab Emirates. There are, however, some destructive testing services, but they impose a lot of limits such as: the fact that a test can evaluate a very few properties of the materials used in construction, the fact that the preparation of the test samples is expensive and generally requires more time that the nondestructive test samples. The nondestructive testing services are used in all types of domains, starting with the construction and ending with the materials and equipment from the medicine domain.