Radiographic Examinations RT

Radiographic examination of welded joints – a non-destructive method

Welded joints can be assessed on the basis of specialised examinations. This uses equipment and technology that allows even the inside of the test piece to be seen. Radiographic testing is one type of test carried out on finished products and structures. They use penetrating X-rays that are passed through the component.

Radiographic testing is often commissioned by builders to assess the quality of the completed work. This method can detect even small inconsistencies in the material structure. In addition, X-ray radiographic examinations are very accurate and pinpoint the location and even the size of inconsistencies. So, if you want to carry out tests to inspect your prepared work, have them carried out by the specialists at Technic-Control. By using our services, you can be sure that the tests will be carried out professionally and that the results will prove to be factually correct.

How Are Radiographic Tests Performed?

Radiographic testing has very versatile applications since it can be conducted on various materials. It is most commonly used to assess the quality of welded joints, but another popular application is the detection of defects in castings, rolled products, and other metallurgical items. The only limitation is that measurements can only be made on elements with access from both sides.

To perform radiographic testing, X-ray flaw detectors are used. These devices emit penetrating X-rays, which are then captured on a film. The weld is depicted on the film as a bright area. In contrast, any discontinuities in the weld and castings appear as darker spots in their structure. Tungsten inclusions, which can also be detected using this method, appear as lighter spots.

Key Features and Applications of Radiographic Testing

One of the undeniable advantages of radiographic testing is its non-destructive nature. The tests do not damage the material’s structure, and the radiation does not affect the mechanical properties or chemical composition of the material. Moreover, the testing is relatively easy to perform, and the results are clear and easy to interpret.

Radiographic testing of welded joints can lead to the detection of various discontinuities within the material’s structure. It enables the identification of surface discontinuities as well as changes in the internal and subsurface structure. Radiographic testing of welded joints can reveal such internal discontinuities in the material’s structure as:

• Gas bubbles;
• Inclusions;
• Lack of fusion;
• Lack of penetration;
• Cracks.

This method also allows for the measurement of the thickness of elements.

Professionally conducted radiographic testing can detect thickness differences as small as 2 percent.

Professional Radiographic Testing at Technic-Control

Radiographic testing of welds does not require very advanced skills and is relatively easy to perform. Results are visible quickly, but only professional personnel can correctly interpret the obtained image—the radiogram. Many companies offer such testing services, but the results are not always satisfactory or accurate. So why is the situation different at Technic-Control?

At our laboratory, we have been conducting radiographic testing and other non-destructive testing methods for many years. Our team consists of specialists who are highly skilled in performing measurements and are well-versed in the specifics of this industry. We carry out tests on strategically important industrial facilities, commissioned by the largest construction companies. We also perform radiographic testing of welds for smaller specialized enterprises.

To ensure the highest quality and effectiveness, we conduct radiographic testing using professional testing equipment. Photochemical materials are used to present the results, and the work is performed in accordance with the general standards for radiographic testing of welds. The PN-EN ISO 17636-1 standard, “Non-destructive testing of welds – Radiographic testing,” serves as the foundation for conducting radiographic tests. Thanks to thorough preparation, we achieve highly accurate testing results.

Do you need to inspect the work of subcontractors? Are you unsure about the quality of finished castings? Regardless of the scope and scale of the work, you can contact our customer service office. We will arrange a convenient appointment, and upon completion, you will receive all the results in radiographic testing reports.