DIN 7990 is a German standard that outlines the requirements for the design, testing, and production of high-quality welds in steel structures. Published by the Deutsches Institut für Normung (DIN), this standard provides a comprehensive framework for ensuring the integrity and reliability of welded joints in steel constructions. By specifying detailed guidelines for welding processes, materials, and techniques, DIN 7990 aims to minimize defects, improve safety, and enhance the overall performance of welded structures. Its provisions cover a wide range of aspects, including welder qualification, welding procedure specifications, and non-destructive testing methods. By adhering to DIN 7990, manufacturers and fabricators can ensure that their welded steel products meet the highest standards of quality, reliability, and safety.