Destructive and Non-destructive testing

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Destructive methods

Non-Destructive methods

 

Destructive testing as follows

TEHNOINSPECT OFFERS DESTRUCTIVE TESTING AS FOLLOWS:

Collected specimens for bend testing of carbon steel, low alloy, alloy and stainless steel samples with thickness of less than 10 mm.

Collected specimens for bend testing of carbon steel, low alloy, alloy and stainless steel samples with thickness of 10 mm-25 mm

Collected specimens for bend testing of metallic materials (eg HDPE)

Bend testing of metallic materials of carbon steel, low alloy, stainless steels, non-metallic materials and their welded joints

Collected specimens for tensile testing of carbon steel, low alloy, alloy and stainless steel samples with thickness of less than 10 mm

Collected specimens for tensile testing of carbon steel, low alloy, alloy and stainless steel samples with a thickness of between 10 mm and 20 mm

Collected specimens for bend testing of metallic materials (eg HDPE)

Tensile testing of metallic materials of carbon steel, low alloy, stainless steels, non-metallic materials and their welded joints

Collected specimens for bend testing shock (resilience) of carbon steel, low alloy, alloy and stainless steel

Impact bend test (resilience) of metallic materials of carbon steel, low alloy, alloy, stainless steel and their welded joints at temperatures of 200° C

Impact bend test (resilience) of metallic materials of carbon steel, low alloy, alloy, stainless steel welded joints and their temperature up to – 400° C

Collected and prepared specimens for examination of macroscopic and microscopic evidence of metallic materials and welded carbon steel, low alloy, alloy and stainless steel (metallographic analysis)

Macroscopic examination of metallic materials and their welded joints (with photos)

Macroscopic examination of metallic materials and welded joints (no photos)

Microscopic examination of metallic materials and welded joints (Photo – MB, Zit, welding)

Microscopic examination of metallic materials and welded joints (no photos)

Microscopic examination of metallic materials and welded joints in the plant (portable microscope)

Shear test for welded joints: pipe – plate tube

Technological break test of welded joints in corner

Testing technology of pipes or welded joints flattening




Non-Destructive testing as follows

Non-destructive testing belongs to the most important technical methods of surveillance. Similar to medical diagnosis, they can recognize very quickly the hidden defects of components and constructions before and during their operation, so that the occurrence of emergency situations is easily prevented.

The evaluation of solid objects in order to prevent the risks under operation is rather difficult, their testing being essential during the different phases of manufacturing and during their entire operation as well.
During the process of shaping a metal object, this can be cooled, contracted, cracked or voided in the structure, and these defects can not be observed with the naked eye. To prevent putting them into operation or causing any kind of damage, the objects with defects must undergo non-destructive examinations.

 

The main argument for testing them is the economical efficiency.

 

The following aspects are made possible by the use of non-destructive examinations:
– Preventing loss of production and exploitation. This prevention is achieved by elimination in the early stages of execution of blanks and improper parts;
– Reducing the operating and maintenance costs;
– Improving the quality of products;
– Increasing operational durability and reliability of products;
– A high degree of reliability;
– A low degree of risk and avoidance of  losses from possible damage;
– The possibility of a key prediction for the behavior modes during operation and the optimum operation modes.

 

TEHNOINSPECT 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.