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PVC-ABS composite water supply pipe production line (Patent No. ZL01244314.X) The main machines adopt two extruders co-operation, well-developed technology prescription obtains from many years experience can cause the pipe specific gravity drop in till 0.9, and the pipe have uniform foam and high intensity; Specially design co-extruding die, merely need to replace core mandril, it may produce solid-wall pipe, solid wall inner helix pipe foamed pipe and foam inner helix pipe. By changing the die it can produce the Nanometer anti-virus PVC feeding pipe, hollow wall inner screw thread muffle pipe and multi-layer composite pipe, like PVC/ABS and so on.