Abstract: Described here in the assay are the features of the newly-built Φ460 mm PQF of Baogang,involving the product mix,the manufacturing flow and equipment configuration,etc. The PQF line features the on line hydraulically-operated tongs type billet hot-centering machine,the positioning block-type lifting roller table between the extracting mill and the sizing(reducing) mill,the mandrel inspection table added to the mandrel circulation area,and employment of the lithium bromide residual heat-utilizing system,etc. Thanks to the above mentioned technological modifications,marked effects are made in terms of seamless pipe quality improvement,equipment failure rate reduction,saving of investment by the company,and environment pollution level lowering,etc.