It is the highest level of seamless steel pipe manufacturing at home and abroad today. It adopts a three-roller pass design, with the advantages of high wall thickness accuracy, large load bearing, and suitable for the production of high-alloy seamless steel pipes. The rolling is stable and can produce ultra-thin seamless steel pipes with a diameter-to-wall ratio (D/S) of more than 50. At the same time, it adopts a unique roll pressing and balancing method; an advanced online process data tracking system (PSS); a flexible and convenient hydraulic automatic roll gap control system (HCCS), with head and tail tip elimination, impact compensation, temperature compensation and other functions, all of which are at the forefront of the tube rolling field.