镀锌螺旋风管主要是在风管铁皮上镀上一层锌，对铁皮起到保护的作用。锌镀层经钝化处理、染色或涂覆护光剂后，能显著提高其防护性和装饰性。螺旋风管市场上按材质一般分为三类：镀锌螺旋风管、不锈钢螺旋风管以及复合螺旋风管。其中，不锈钢风管质量好，适用性强，但高。目前市场通广的螺旋风管是镀锌板的。
The galvanized spiral duct is mainly plated with zinc on the iron sheet of the wind pipe to protect the iron sheet. Zinc coating is passivated, dyed or coated with light retaining agent, which can significantly improve its protective and decorative properties. 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.
镀锌板螺旋风管，基本是不锈钢螺旋风管的特性，但是相对只有不锈钢风管的三分之二甚更低。复合螺旋风管一般应用在外界环境较为普通，对风管要求不太高的场所。螺旋风管适用范围非常广泛。净化系统送回风管、空调通风管、工业送排风通风管、系统吸排风管、矿用抽放瓦斯管、矿用涂胶布风筒等。
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. The spiral duct is widely applied. Purification system return air duct, central air conditioning ventilation duct, industrial air supply and exhaust ventilation duct, environmental protection system suction and exhaust duct, mine gas drainage pipe, mine coating duct, etc.
有效的风管的清洗方式有三种：
There are three ways to clean the most effective wind pipes.
1.真空吸污：用类似有手握式的真空吸污管来操作。用刷子直接接触管道内壁以污物。这种方法需要风管有较大的检修孔使操作的人员能够尽可能够得到但这种方法可能漏掉一局部尘土和污物，因为风管不能形成完全的负压条件。而以下几种方法可以形成负压条件。
1. vacuum suction: operated by a vacuum suction pipe similar to a handheld type. Use brush to directly contact the inner wall of the pipe to remove dirt. This method requires the duct to have a large overhaul hole so that the operator can get as much as possible, but this method is most likely to leave out a part of the dust and dirt, because the duct can not form a complete negative pressure conditions. The following methods can form negative pressure conditions.
2.动力洗刷：用气动或者电动的毛刷将脏污刷动，然后污物用和气体冲洗相同的方法和方向被吸到真空收集器中。这种方法要求尽可能的小心不于破坏保温资料的外表。
2. Power scrubbing: brush dirt with a pneumatic or electric brush, and then the dirt is sucked into the vacuum collector in the same way and direction as the gas scrubbing. This method requires caution as far as possible, so as not to damage the appearance of thermal insulation materials.
3.气体冲洗：这种方法借助连接到风管的配有喷嘴的软管以输送压缩空气。设计喷嘴使得压缩空气能够把尘土和污物驱赶进来。而被压缩空气去干的污物和尘土则顺着风管被输送到真空集容器中。
3. gas flushing: this method uses the hose connected to the air duct with nozzle to transport compressed air. The design of the nozzles allows compressed air to drive dust and dirt into it. The dirt and dust dried by compressed air are transported to the vacuum collection container along the duct.
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