1. ThePVC pipe machineadopt 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 unifom foam and high intensiry ;Specially design co-extruding die,merely need to replace core mandenl ,it may produce sofid-wall pipe,solid wall inner helix pipe toamed pipe and foam inner helix pipe. 2. Bychanging the die it can produce the Nanometer anti-virus PVC feeding pipe,hollow wall inner screw thread muffle pipe and mufti-layer composite pipe.like PVC/ABS and so on.