Abstract The traditional seamless steel pipe rolling mill consists of two high stands.The first PQF mill with three high stands was built at 168 pipe mill plant of Tianjin Pipe Corporation in 2003.

• 摘要 传统的无缝钢管连轧机为两辊式轧机，天津钢管公司168钢管厂于2003年新建世界第1套PQF三辊式无缝钢管连轧机。