The spiral duct market is generally divided into three types according to the material: galvanized spiral duct, stainless steel spiral duct and composite spiral duct. Among them, the stainless steel air duct has the best quality and applicability, but the price is high. At present, the most widely circulated spiral pipes in the market are galvanized sheets. Galvanized sheet spiral ducts are basically stainless steel spiral ducts, but the price is only two-thirds or even lower than stainless steel ducts.

Composite spiral air duct is commonly used in places where the external environment is more common and the requirements for wind pipes are not too high. Because iron sheets are prone to chemical reactions in various environments, they cause corrosion and rust. Zinc hardly changes in dry air. In moist air, a dense zinc carbonate film is formed on the surface of zinc. The spiral duct is mainly plated with zinc on the iron sheet of the wind pipe, which plays a protective role on the iron sheet. Zinc coating is passivated, dyed or coated with light retaining agent, which can significantly improve its protective and decorative properties. Now, spiral air duct equipment is becoming more mature, and users can make spiral air pipes more efficiently and quickly. Spiro duct making machine is the best and oldest one in the world.

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Now, there are many kinds of duct line. Please choose it as your need from our LMS team.