Description of HDPE Huge Diameter Hollowness Wall Spiral Pipe Production Line: Hollowness Wall Spiral Pipe made by this production line has high ring stiffness and high brunt intensity due to its unique structure. It can be used for over 50 years and has many advantages such as light weight, easy operation, facile installation, withstanding pressure, corrosion resistant such as acid, alkali and salt etc. The pipe of large diameter hollow wall spiral pipe production line (from 150mm-3000mm in dia) is becoming replacement of cement pipe and cast iron pipe since it possesses many advantages such as easy operation and low cost of assembling, tight juncture between the pipes, no pollution and so on. The pipe of large diameter hollow wall spiral pipe production line is being widely used as sewerage and drainage pipe nowadays. This product has a good prospect in application and enjoys a potential market. This pipe extrusion line include extruder, die head, molds, spiral forming machine, forming molds, glue extruder, vacuum calibrating system, water spraying tank, cutting machine, overturning bracket and the whole line controlling system.