Abstract: Described at first in the article are the major problems relating to the technology of the φ130 mm plug pipe mill plant located at No.4 Steel Rolling Facility of Anyang I & S Co., Ltd. before the modification of the mill plant. Owing to the modification of the said pipe plant with the slight stretch reducing process, such advantages of the plant have been achieved, namely higher flexibility to the ever-changing market demand, higher capacity and better product quality as well as optimization of relevant economic-technical norms of the operation line.