Now the domestic spiral steel pipe process is double-sided submerged arc welding, double-sided submerged arc welding skills were created and used in 1940, it is the same welding process and hand welding, is the use of slag welding, spiral steel pipe submerged arc welding and hand welding is different from the local wire and flux are separate, hand welding is wire flux are together. The wire is selected in the form of a disk, that is, the entire disk, can be used in succession or continuously.
In a sense, spiral steel pipe can be a millimeter of welding wire is not spoiled, welding wire operation is in the flux enclosed inside the welding so called submerged arc welding, so that the quality of welding out high, spiral steel pipe on the selection of wire and flux requirements are high, different raw materials corresponding to different wire flux, especially in the case of the production of high-standard spiral steel pipe now, it is necessary to select the appropriate wire and Flux.
Spiral steel pipe technology is high, for the general enterprise good inside and outside welders less than familiar with more than three years, and has the relevant certificate issued by the spiral steel pipe industry to officially online work, spiral steel pipe production line is the process, first raw materials on the material, again raw material milling, start inside and outside welding, steel pipe appearance testing, steel pipe sizing cut pipe, steel pipe hydraulic test, steel pipe X-ray flaw detection, sent to the yard for preservation.