螺旋风管是用金属带料卷制成螺旋形咬缝的薄壁管，圆形，无焊接，不漏气，不漏水，多用于送风和散装物料输送，代替传统的白铁管（即手工咬缝铁管）。是风管的一种，全机制，直管无需手工敲打。其主要用途如下：
Spiral air duct is a kind of thin-walled pipe with spiral seam made of metal strip material. It is round, without welding, air leakage and water leakage. It is mostly used for air supply and bulk material transportation instead of the traditional white iron pipe (i.e. manual seam iron pipe). It is a kind of air duct with full mechanism, and the straight pipe does not need to be knocked by hand. Its main uses are as follows:
(1) 送风，包括通气，如送鲜风和排气，这个范围很广，如工厂车间，生产场地空气，由于有害气体产生需要排出室外，又需要把室外空气输送至室内。这时就要使用流量大而压力小的空气输送管道，螺旋风管就最适用，一般情况下使用镀锌铁管，有腐蚀性及特别潮湿场所使用不锈钢管。
(1) Air supply, including ventilation, such as fresh air and exhaust, has a wide range. For example, the air in factory workshop and production site needs to be discharged out of the room due to the generation of harmful gases, and the outdoor air needs to be delivered to the room. At this time, it is necessary to use the air transmission pipe with large flow and small pressure, and the spiral air pipe is the most suitable. Generally, galvanized iron pipe is used, and stainless steel pipe is used in corrosive and especially humid places.
(2) 送冷风。最常见的是中央空调的管道，这种管道需要加保温材料。螺旋风管可内贴保温材料，外表看来美观。
(2) Cold air. The most common is the central air conditioning pipe, which needs to be insulated. Spiral air duct can be pasted with thermal insulation material inside, and the appearance is beautiful.
(3) 排油烟。饭店、酒楼、宾馆的厨房均有大量油烟产生，需要排出，使用圆形的风管就是油烟囱。在这里，螺旋风管该叫做油烟管。
(3) Exhaust oil fume. There are a lot of lampblack in the kitchens of hotels, restaurants and hotels, which need to be discharged. The circular air pipe is the lampblack chimney. Here, the spiral duct should be called the lampblack.
(4) 除尘。有些工厂生产车间很多尘埃，需要专门的除尘装置，其中风流量较大的管道，可使用螺旋风管。
(4) Dust removal. There are a lot of dust in the production workshop of some factories, and special dust removal device is needed. For the pipes with large air flow, spiral air pipes can be used.
(5) 散装物料输送。有些工厂的生产过程中，需要输送松散的颗粒，特别是比重不大的如发泡塑料粒之类的使用螺旋风管造价低、效果好。
(5) Bulk material transportation. In the production process of some factories, it is necessary to transport loose particles, especially for the small proportion such as foamed plastic particles, which use spiral air ducts with low cost and good effect.