Which is designed for manufacturing high quality steel reinforced spiral corrugated pipes. The extrusion system including two stage extrusion system, i.e. steel coating extrusion system and spiral forming extrusion system. The working principle is steel coating extrusion system coat the adhesive resin onto the steel strip, then PE layer lightly coat on the top of steel layer. The pipes manufactured by this extrusion line offers high grade stiffness, strong external pressure, nontoxic and low engineering cost advantages.It is suitable for the conveying of high pressure or explosive gas and liquid, heavy suction and delivery of liquid sludge. It is mainly used for chemical industry, building and vacuum pumps.