The Φ273-Φ630 * 16mm stainless steel welded pipe unit designed and manufactured by our company for a steel pipe company in Yingkou was successfully commissioned in August 2014, and successfully produced Φ273 and Φ610 two specifications of steel pipes with qualified product quality. The unit adopts the latest technology of our company, flexible forming, and automatic type change adjustment. There is no need to replace the rollers in the initial forming section, only the parameters of pipe diameter, thickness, material, etc. need to be input on the computer, the rollers reach the position by themselves, and the production starts directly. The precision forming and sizing section adopts rapid roll changing technology. The application of these two latest technologies has shortened the time for changing models to 1-2 hours.