Abstract: Described in the article are the main aspects of the newly-built large-sized Φ720 mm Pilger pipe mill line located at Hengyang Valin Steel Tube (Group) Co.,Ltd.,including the manufacturing process flow and the plant layout,and composition,features and basic parameters of the main equipment. The plant is capable of producing extra-large-sized, hi-precision and hi-grade steel tubes with CC billets or polygonal ingots. The stat-of-the-art feeding system as employed by the Pilger mill is capable of not only ensuring higher rolling speed and less labor intensity,but also getting the W.T. and O.D. tolerances considerably improved.