... Diameter HDPE Water Supply and Gas Supply Pipe Extrusion Line ... certification Large Diameter HDPE Water Supply and Gas Supply Pipe Extrusion LineModelPipe diameter(mm ... Advantages:Machine: Unique structure, easily control,automation and stable performance,Pipe: moderate rigidity, strength, good ... anti-stress split, and favorable hot melting. Large Diameter HDPE Water Supply and Gas Supply Pipe Extrusion ...