Welding quality testing - Ultrasonic testing of welds - Rating standards

Date：2023-04-10 16:35:17Views：563

Welding is one of the most commonly used connection methods in metal manufacturing, and its quality has a crucial impact on the safety and reliability of industrial products. During the welding process, if there are defects or the welding quality does not meet the standards, it will have a significant impact on the quality and service life of the product. Therefore, the detection of welding quality has become very important. Among them, the ultrasonic welding seam inspection rating standard is currently the most commonly used testing method.

The grading standard for ultrasonic weld inspection refers to the use of ultrasonic testing instruments to detect welds and classify and grade weld defects. In welding quality inspection, ultrasonic testing technology has the advantages of non-contact, high sensitivity, high resolution, and wide adaptability. It can effectively detect welding defect, such as holes, cracks, inclusions, etc., and grade the welds according to the size, shape, location and other characteristics of defects to determine whether they meet the standard requirements.

The grading standards for ultrasonic weld inspection are usually formulated according to international or industry standards, with the most commonly used being those developed by the American Welding Society (AWS) and the European Welding Standards (EN). These standards usually classify welding defect into four grades: A, B, C and D according to the size, depth, shape, location, quantity and other factors of welding defects. Among them, Class A is the highest level, indicating that the weld seam has no defects or the defects are very small, which will not affect the welding quality and strength; Level B is a medium level, indicating that there are some small defects in the weld seam, but it will not have a significant impact on the welding quality and strength; C-level and D-level are lower levels, indicating that there are significant defects in the weld seam that need to be repaired or redone.

Ultrasonic weld flaw detection rating standard is an important welding quality detection method, which can quickly and accurately detect welding defect and conduct scientific and reasonable rating to ensure that the welding quality meets the standard requirements. For welding engineers and operators, it is necessary to master the ultrasonic welding seam inspection rating standards, which can not only improve welding quality but also enhance product safety. In addition to the ultrasonic welding seam inspection rating standards, there are other welding quality inspection methods, such as X-ray testing, magnetic particle testing, eddy current testing, etc. These methods have their own advantages and disadvantages, and appropriate detection methods should be selected based on the specific situation. For example, X-ray testing can detect small welding defect, but it requires expensive equipment and professional technology, while magnetic particle testing is applicable to detecting surface cracks and other defects.

When conducting welding quality testing, it is necessary to follow certain processes and standards to ensure the accuracy and reliability of the testing results. First, appropriate detection methods and equipment shall be selected, and the detection parameters shall be adjusted according to the characteristics of welding defect. Secondly, the test results shall be analyzed and evaluated to determine the grade and type of welding defect, and the corresponding treatment scheme shall be formulated according to the actual situation. Finally, secondary inspection or repair shall be carried out for welding defect of high importance to ensure that the welding quality meets the standard requirements.

The above is an introduction to welding quality testing. If you have any needs in this regard, please feel free to consult Chuangxin Testing! Welding quality inspection is an important link in ensuring the safety and reliability of industrial products. The ultrasonic welding seam inspection rating standard is one of the most commonly used methods, which is widely used and has good results. However, in practical applications, appropriate testing methods should be selected based on the specific situation, and certain processes and standards should be followed to ensure that the welding quality meets the standard requirements.