I Brief Introduction
API pipe line technical process: uncoiler→ strip steel flattening r→ end shear → strip steel end welding→ accumulator→ forming→ welding→ eliminating burr→ sizing→ flying cutting →initial check →steel pipe straightening →pipe section processing →hydraulic tester →fault detection tester →printing and coating →finished product
Large-scale pipe and special requested pipe need to add strip steel edge processing, fault detection of board and welding seam annealing. Continuous forming sizing unit is the key equipment in H.F pipe line and combination equipment including forming machine, welder, cooling device and sizing unit which undertake forming, welding, sizing and other main process. The increasing of H.F pipe quality relies on the constant improving of continuous forming unit. In order to obtain well forming quality, it must have reasonable forming way and excellent equipment.

II Main characteristics
In order to fit various kinds of forming request, Deyou man