Equipment composition: 1、Feeding system (Made in China): uncoiler (with 3 material stations), press arm, chisel head, 9-roller leveling machine, centering, conveying, shearing and welding device, Horizontal spiral accumulator。 2、Steel tube forming and sizing system (Made in Japan. Nakata): FFX automatic forming process, Initial configuration: 5 horizontal Shafts stand+ 3 vertical Shafts stand, final forming :2 horizontal Shafts stand + 2 quick-change devices, each roll shaft is driven by a separate motor. 3、1000kw high-frequency (Made in US.): Variable frequency motor drive. 4、4-Stand Online Intermediate Frequency Annealing Unit(Made in US.) 5、Automatic Sizing Machine(Made in Japan. Nakata):2 Horizontal Shafts stand + 2 Quick-Change devices,2 Turk's Head Straightening Units 6、Milling Flying Saw(Made in Japan. Nakata) 7、Conveyor Roller Table 8、7-Roll Straightener (Made in Korea) 9、Double Side Automatic Pipe-End Facing Machine (Made in China) 10、 hydrapress Testing Machine (Made in China) 11、mould(horizontal Shafts stand 255mm):Φ114 Φ168 Φ219 Φ273 Φ325 Φ355