1)Pipe diameter:16-160mm 2)single screw 3)Certificate:CE ... and inside wall, and little internal stress. 4.Producing pipe limitΦ16-Φ250mm,manufacture velocity up to 12m/min. 5 ... many merits such as non-toxic, rustless, non-filthily, heat thermostable, heat preservation, convenient installment and reasonable price.2)It has been widely ... /T-30% deposit and the rest before delivery ppr pipe extrusion line