An Approach to Using Two-step Process to Produce SAW Spiral Weld Pipe

With the conventional manufacturing process for SAW spiral weld pipes, both formation and welding are completed in one operational step, which is not so good in terms of cost-effectiveness and welding quality.Taking advantages of the pre-finish welding process for SAW straight weld pipe, the two-step process for SAW spiral weld pipe has been developed and successfully useded for a long time abroad.Described in the article are the main aspects of this process, including the development history, the characteristics, the process flow and the main equipment characteristics.Based on the analysis by the co-authors, it is concluded that the said two-step process is an effective solution to eliminate the inherent defects of the foresaid conventional process, and thus get both the product quality and production efficiency increased significantly.It is recommended to spread out this advanced process and use it for relevant domestic mills as soon as possible.