Spiral duct has the following characteristics: 1, the appearance of smooth, non-zinc tumors, glitches, silvery white; 2, easy to install, less connection points; 3, small ventilation resistance, ventilation and noise; 4, the strength and rigidity are good; 5 thickness are controllable, in the arbitrary choice of 5-107μm; 6, no hydrogen embrittlement, no temperature hazards, ensure the mechanical properties remain unchanged; 7, may need to replace part of hot-dip galvanizing process; 8, corrosion good, neutral salt spray test up to 240 hours; 9, using hot-dip galvanizing completed for highly corrosive environments various acid, alkali mist, etc.; 10, according to customer requirements, designed a variety of customized wind tube. Applications spiral duct scope is very wide. Return air duct cleaning system, central air conditioning and ventilation pipes, industrial supply and exhaust ventilation pipes, exhaust pipes suck environmental systems, mine gas drainage pipe, duct and other mining rubberized cloth.