Industry Analysis: Steel Pipe Welding Technology

Although with the continuous progress and vigorous development of advanced science and technology, welded pipe technology has achieved a large-scale leapfrog development in the past ten years of this century, which directly drives the production efficiency of welded pipes and the quality of welded pipes. Great strides have been made. Although the technical quality has been improved, in the fiercely competitive market, the quality requirements for welded pipes are even higher. Therefore, improving the quality of steel pipe materials and reducing the production cost of steel pipe materials on the existing basis are the current direction of the welded pipe industry. a hot research issue.

The transformation and progress of high-frequency straight seam welded pipe is very fast, from the improvement of the initial roll forming to the later row roll forming, until today's flexible forming, straight edge forming and the integration of the rigid frame into advanced science Technical models, the molding used today has become increasingly perfect, and it can be said that intelligent molding has been initially realized to a certain extent.
The welding and heat treatment power supply technology in the welded tube technology process has also changed from the electronic tube type at the beginning to the current all-solid-state type, which greatly increases the power of fuel combustion on the original basis. Moreover, operating concepts such as digitalization and intelligence for automatic control have also been introduced. Moreover, the researchers are committed to researching the problems in the high-frequency welding process, and put forward practical and reliable solutions to improve the existing problems. The seam performance is very close to that of the base material. After perfecting the consistent management mode, the quality control of high-frequency welded pipes is extended upward to the upstream raw material design and production process. To improve product performance and quality, this technology has been widely used in key joints such as submarine pipelines and high-grade oil well pipes.
In recent years, the equipment level of high-frequency resistance welded pipes in my country has been greatly improved, and the production lines of large and medium diameters have basically reached the international advanced level. After continuous improvement of welding and preheating processes, the improvement of welding zone enhancement technology has been preliminarily completed. The welding quality has been greatly improved, and the performance of some welds can be comparable to that of the base metal. P111 casing has been developed, and X60 high-frequency resistance welding pipe delivery pipes have been applied in submarine pipelines. The localization of high-frequency welded pipe equipment has made great progress. The informatization and systematic construction of the high-frequency welded pipe production line is progressing smoothly. Some companies have established a complete process system and it is working well, but we should see that due to the increasingly saturated market, there are still a large number of units under construction and ready to be put into use.

Through the improvement of high technology, the entire system has realized informatization, which is closer to full mechanical automation, reducing the workload of personnel, and finally realized the goal of full-line automation and informatization, and cooperated with advanced international countries at the fastest speed . Because only by improving its own production quality, it is possible to stand firm and stand for a long time in today's fierce global competition, and on this basis, my country may become one of the steel pipe powerhouses in the world.