1.Two cavity pipe production line. 2.Pipe diameter from 20 to 63 mm. 3.Mold specification 20 25 32 40 50mm. 4. ... Full down line. Two Cavity Pipe Extrusion Line :1.Use ... platform, tractor, cutter, drainage pipe, core foaming pipe, muffling drainage pipe (hollow spiral pipe, solid wall spiral pipe), multi-pore pipe for communications, mixing rack, etc ...