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Technical characteristics of double-sided submerged arc welding spiral steel pipe

1. During the forming process of the steel pipe, the steel plate deforms evenly, the residual stress is small, and the surface is not scratched. Processed steel pipes have greater flexibility in the size range of the diameter and the wall thickness of the steel pipes, especially in the production of high steel grade thick-walled steel pipes, especially large-diameter thick-walled pipes. Users have more requirements in terms of steel pipe specifications;


2. Adopting the process of pre-welding and then internal and external welding, welding can be realized at the position, and defects such as wrong edge, welding deviation, and incomplete penetration are not easy to occur, and the welding quality is easy to control;


3. The overall mechanical expansion can effectively improve the dimensional accuracy of the steel pipe, and improve the distribution of the internal stress of the steel pipe, to avoid damage due to stress corrosion and at the same time facilitates the welding construction on site;