28.4. What are the solutions to the inclusions defect?

In order to improve the welding quality of spiral steel pipes and effectively resolve the slag inclusion defects, it is necessary to properly handle the groove dimensions. The groove dimensions should be determined based on practical experience to effectively avoid the occurrence of slag inclusion defects. Furthermore, it is important to adjust the welding current and control the welding speed, ensuring that the steel plate is evenly heated to avoid residual oxides due to underheating or overheating. Close attention should also be paid to the swinging position of the welding rod to prevent significant deviations in its trajectory, which could compromise welding quality. Excessive welding slag can also lead to slag inclusion, so timely cleaning of welding slag is essential during welding operations. The quality of the welding electrode itself greatly influences slag inclusion defects. If there is an eccentric welding electrode with uneven distribution of welding material, it will result in a large amount of slag inclusion. Therefore, during the selection of welding rods, it is important to pick out those that are irregularly shaped or have incorrectly positioned cores, which will effectively help in avoiding slag inclusion defects.