Measures for addressing crack defects

Due to the significant impact of crack defects, it is necessary to devote more effort to inspecting for them. During the welding process, the first step is to select welding parameters reasonably to appropriately slow down the cooling rate. Attention should also be paid to the shape of the weld to ensure it conforms to the technical requirements of the welding process, which is not conducive to crack formation. In the welding process of spiral steel pipes, a multi-layer and multi-pass welding technique should be employed, using a low current to mitigate or prevent the occurrence of crack defects. When designing the welding process, the prevention of crack defects should be explicitly considered as a fundamental requirement. Additionally, welding stresses should be minimized as much as possible based on the specific welding conditions, which can effectively avoid the formation of welding cracks.