. PPR PIPE PRODUCTION LINE /MACHINE /EXTRUSION LINE with polyolefin purposed single-screw extruder; it has the characters of quick plasticizing, high efficiency and so on. . The specially designed co-extrusion die head is reasonable in flow channel, smooth in both internal and external walls, and small in internal stress. . Pipe diameter is among -mm and production speed reaches to m/min. . One unit serves several purposes. It can produce common PP-R, Nanometer anti-bacteria pipe, PE-RT and PE-X. . If added one co-extrusion engine and die on original base, it can produce PP-R fiberglass reinforced composite pipe