Domestic high frequency straight seam welded pipe production line break the monopoly of the developed countries for half a centu
On October 10, 2012, the world's largest SG / 711 mm high frequency straight seam welded pipe production line in dalian, a certain group. This group of the world's largest affiliates of high-frequency welded pipe unit, show that China's system of large caliber pipe technology has reached the advanced world level, therefore the international association of welded pipe congratulatory message: "have is one of the biggest diameter of 711 mm high frequency welded pipe, congratulations!"
West to east gas pipeline, oil north south lose, south-north water diversion project, as well as our country is planning to use coal and ore in the eastern part of the pipeline transport, the long distance transportation of all kinds of resources of large-scale pipeline project, pipeline of large diameter, high safety performance has a huge demand, but the pipe technology held by a few developed countries for a long time.
Because of the high frequency welded pipe electrothermal conversion efficiency can reach above 90%, and the application of some advanced technology, high frequency straight seam welded pipe for its security and stability for replacement of seamless steel pipe and spiral welded pipe industry direction. This production line is 300 meters long and weighs 2500 tons, it can produce the largest - 711 mm in diameter, the most thick wall welded pipe; Collection and design is flexible, high frequency welding, submerged arc welding, argon arc welding of three kinds of welding method, can be used for carbon steel and stainless steel two kinds of materials, production of hundreds of specifications of steel pipe. Every change to produce a new type steel tube, only 13 minutes of adjustment.
Group displayed to break the monopoly of the developed countries for half a century. Diameter of 610 mm high frequency welded pipe production line, is the highest level for decades at home and abroad, the group first breakthrough with the specifications to 660 mm, now passed to 711 mm. In the field of continuous forming technology of straight seam welded steel pipe, group a total of 9 82 patents, invention patents. Group will also be the protection of the patent technology extended to Germany, the United States and Japan and other developed countries.
Market volume brake bad finish to repair