Spiral welded pipe units process strip steel into spiral welded pipes through the coordinated operation of mechanical transmission and electrical control. First, an uncoiler unwinds the strip steel, and a leveler eliminates internal stress (leveling accuracy ±0.5mm). Then, a forming machine uses multiple sets of rollers to coil the strip steel into a spiral shape (spiral angle adjustable from 30° to 85°), ensuring edge alignment. The welding process uses submerged arc welding (current 400-1200A, voltage 28-40V), and the welding speed is adjusted in real time (0.5-3m/min) to ensure weld quality (compliant with API 5L standards). A sizing machine calibrates the outer diameter of the pipe (error ±0.2%), and finally, it is cut to the set length. This technology is suitable for oil/gas pipeline manufacturing, combining high-efficiency forming (capacity 20-50 tons/hour) with low energy consumption.
ESTABLISHED IN 2OO9
