Seamless Pipe Production Process Flow Chart
Pipe billet entering the factory → incoming inspection → Precision rolling and diameter reduction → Degreasing annealing → Heading → drawing → Secondary oil removal and return → Straightening and sizing → Trimming and chamfering → Surface polishing → Internal and external cleaning → Water pressure test → Inner hole drying → Eddy current testing and spraying → Endoscopic examination → Appearance dimension inspection → Sleeve sheath → PE bag packaging → Counting and packing, shipping
