After unremitting efforts, on May 24, the first batch of high-strength X80-class large-diameter spiral submerged arc welded steel pipes was successfully trial-produced in Baoji Petroleum Steel Co., Ltd., filling the blank of such products in China.
As the largest professional manufacturer of welded pipes in China, Baoji Steel Pipe Co., Ltd. listed the task of developing high-strength X80-class large-diameter spiral submerged arc welded steel pipe at the end of 2006. In order to try out the products that meet the technical requirements as soon as possible, the company has fully utilized its technological leading edge and set up a research and development project group to take the blank of the manufacturing technology of high-strength and large-diameter thick-walled pipeline steel pipes of X80 and above in China as a breakthrough. At the beginning, we actively cooperated with WISCO in the trial production of the coiled plate, and carried out performance analysis on the prototyped coil, and put forward suggestions for improvement. At the same time, the company's welded pipe research institute also uses the orthogonal test method to carry out a large number of flat welding process matching tests, and finally optimizes the optimum process parameters.
Not only that, but the company also pioneered the development of wire and flux for the production of X80 thick-walled welded pipes. These optimized welding materials and welding processes have played an important role in the trial production of X80 large diameter spiral submerged arc welded pipes.
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