The seamlessness of stainless steel industrial welded pipe means that the inner and outer welds of the welded pipe and the surface of the steel plate are polished and blasted. After the weld is processed, it is the same as the surface of the base material stainless steel plate, and the position of the weld is not visible to the naked eye. A long time ago, people realized that stainless steel welded pipes are superior to stainless steel seamless pipes in terms of material and mechanical properties, but the problem of removing the residual height of the internal and external welds of the stainless steel welded pipe, especially the residual height of the internal welds, has always plagued stainless steel. End users of welded pipes have also received restrictions on the application of stainless steel welded pipes. Therefore, how to achieve the seamlessness of stainless steel welded pipe is a very important issue for users of welded pipe.

In the past, countless solutions have been proposed, such as built-in scrapers or internal grinding devices, but the results are not satisfactory. This seriously hindered the further expansion of the application field of stainless steel welded pipe. It was not until the domestic successful development of the double push type internal leveling machine that solved this technical problem. That is, by absorbing and digesting the technology imported from abroad, the stainless steel internal and external welding seam leveling device has been developed and successfully applied to the stainless steel welded pipe unit. Since it has been put into production in recent years, it has been operating well and has achieved good investment benefits.

The market demand for seamless stainless steel welded pipe is mainly manifested in basic industries, such as petroleum, chemical industry, power generation, etc., and its demand accounts for about one-third of the total stainless steel seamless pipe consumption, as well as automotive, shipbuilding, construction and environmental protection There is also a large demand for industry. Seamless stainless steel welded pipes are currently mainly used in fluid pipes, pressure pipes, pipes for mechanical structures, urban landscape, and other industries, with annual consumption of about 800,000 tons. The demand for seamless stainless steel welded pipe for industry is relatively high, and the production process is mature. At present, the annual seamless amount of industrial stainless steel welded pipe in China is about 300,000 tons, some still need to be imported. Of course, stainless steel welded pipe manufacturers are still working hard to expand the production scale. Try to meet the needs of more customers.