Large diameter seamless steel pipe production of complete sets of equipment, mainly used for the production of nuclear power tubes, high pressure boiler tubes, energy pipes, alternative imports. Taiyuan Heavy Industry in the 1990s, independent research and development of Ф2000mm dragon piercing unit, and then design and manufacture of Ф508, Ф630, Ф720, Ф1000, Ф1200mm large diameter seamless steel pipe production line. Large-diameter seamless steel pipe production line perforation process pressure punching and oblique rolling piercing two forms, rolling process Pilger rolling and rolling in two forms, the company designed and manufactured Ф720mm multi-functional wear and rolling mill group, to achieve the A breakthrough in the production process of large diameter steel pipe.