The extrusion line is newly developed based on European technique and systemic study and research of new type pipe production line; It's suitable for PE, PP and other polyethylene pipes high-speed extrusion. The extrusion line has many advantages, such as, neat outline, highly automatic control, stable performance, it's greatly reputed by the customers due to "European performance and domestic price", and it's the best option as the substitute of the imported one. KR-series high-efficiency single screw extruder has 8 standard sizes: ??30, ??45, ??65, ??75, ??90, ??105, ??120, ??150MM, and the L/D ratio is 30: 1D--37: 1DEffective length, All the equipments are controlled by the PLC/PCC smart modular, further, the automatic control, real-time data record and closed-loop control are realized. The advantaged are high output, high adaptability for different raw material, highly stable good-quality extrusion and so on.