28.10. What are the solutions for crack defects?

Due to the significant impact of crack defects, it is essential to invest more effort into the inspection of these defects. During the welding process, it is necessary to make a reasonable selection of welding parameters to appropriately slow down the cooling rate during welding. Additionally, attention must be paid to the shape of the weld to ensure it meets the technical requirements of the welding process, which helps prevent the occurrence of cracks. In the welding process of spiral steel pipes, a multi-layer and multi-pass welding technique should be adopted, using low current to slow down or prevent the generation of crack defects. When designing the welding process, preventing the occurrence of crack defects should be a fundamental requirement clearly reflected in the design. At the same time, efforts should be made to minimize welding stress based on welding conditions, which can effectively avoid the occurrence of welding cracks.