1.Single screw extruders especially used for polyolefin material possess effective plasticizing effect and high extrusion speed. 2.The special detachment type mixing screw and the standard designed die with spiral structure & reasonable channel are applicable to produce pipes with smooth inside and outside face. 3.Unique sizing and cooling mode is capable of producing pipe scope 50-200 mm, production speed is up to 0.6~1.5 M/min. 4.The die by customized design. 5.The helix apportionment style diffluent body and big flow space assure the melting material has enough stay time. 6.Optimal low melting temperature results in little internal pipe stress, smooth inner and outer pipe surfaces. 7.All kind of polyolefin material, multi-layers spiral strengthening pipe can be co-extruded for various uses, 80% of recycle material can be used in production. 8.Optimum spiral copper sizing sleeve, its entrance carrying pre-cooling and powerful vacuum device to suit for high speed extruding pipe. 9.Specific design for spray cooling trough. 10.Cooling water trough is made of stainless steel. 11.High efficient cooling comes from peculiar spraying nozzle and high efficiency water pump. 12.Three-dimensional regulation, longitudinal move by motor. 13.Advanced co-extrusion technology and low cost to use recovery material.