Main Process of Seamless Square Tube

1. Hygienic grade mirror tube process flow:
Tube blank - inspection - peeling - inspection - heating - perforation - acid washing - grinding - lubrication and air drying - welding head - cold drawing - solid solution treatment - acid washing - acid washing passivation - inspection - cold rolling - degreasing - cutting - air drying - internal polishing - external polishing - inspection - identification - finished product packaging
2. Industrial Pipe Process Flow
Tube blank - inspection - peeling - inspection - heating - perforation - acid washing - grinding - lubrication and air drying - welding head - cold drawing - solid solution treatment - acid washing - acid washing passivation - inspection
3. Welding pipe process flow
Uncoiling - flattening - end shearing and welding - looper - forming - welding - removal of inner and outer weld beads - pre correction - induction heat treatment - sizing and straightening - eddy current testing - cutting - water pressure inspection - pickling - final inspection - packaging
4. Seamless square tube process flow
Round steel - Pipe blank - Inspection - Heating - Piercing - Sizing - Hot rolling - Flat head - Inspection - Acid washing - Ball annealing - Cold drawing - Forming - Flushing - Inspection