◎ The Zhaohe spiral duct system is composed of a series of spiral straight pipes and pipe fittings that are quickly plugged in or flanged together by stamping, seam welding or hand-made, ensuring reliable quality.
◎ Air duct systems are widely used in fields such as ships, Marine engineering, construction, fresh air, cruise ships, paper making, and fine chemicals.
◎ Equipped with international imported production lines, including Swiss spiral pipe machines, German TOX forming machines, Italian flanging equipment and South Korean fully automatic TDF air duct systems.
◎ Connection method： 1》Flange connection 2》Plug-in link
◎ Material adoption： 1） Galvanized sheet: Double-sided galvanized weight 120g-275g/㎡，plate thickness 0.5mm-1.5mm；
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