Spiral air duct is a thin-walled pipe made of metal strip coils with spiral seams. It is circular and has the main characteristics of no welding, no air leakage, and no water leakage. It is mainly used for air supply and bulk material transportation, replacing traditional white iron pipes (i.e. manual seam iron pipes). It is a type of air duct that does not require manual tapping.

其主要用途如下：

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。

(1) Air supply, including ventilation, such as fresh air supply and exhaust, covers a wide range of areas, such as factory workshops and production site air. Due to the generation of harmful gases, outdoor air needs to be discharged and transported indoors.

(2) 送冷风。常见的是空调的管道，这种管道需要加保温材料。

(2) Supply cold air. The common type is the pipes of central air conditioning, which require insulation materials.

(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。

(3) Exhaust fumes. Restaurants, restaurants, and hotel kitchens all produce a large amount of oil smoke that needs to be discharged. The use of circular air ducts is called oil smoke chimneys.

(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. Some factories have a lot of dust in their production workshops and require specialized dust removal devices. For pipes with high air flow, spiral air ducts 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 those with small specific gravity such as foam plastic particles, which use spiral air ducts with low cost and good results.

苏州通风管道：

Suzhou ventilation pipeline:

1、设计独特：通风管道的开口上安装了烟气止回阀和防火隔离门，可以有效防止串味和串火。

1. Unique design: The opening of the ventilation duct is equipped with a smoke check valve and a fire isolation door, which can effectively prevent odor and fire.

2、造价低：通风管道与传统砖砌通风道比，能节约工程造价40%左右。

2. Low cost: Compared to traditional brick ventilation ducts, ventilation ducts can save about 40% of the project cost.

3、设计灵活：通风管道加工可根据预留洞的大小，随时调整管道的规格尺寸。

3. Flexible design: The processing of ventilation ducts can adjust the specifications and dimensions of the ducts at any time according to the size of the reserved holes.

4、质高强：与传统砖砌通风道比，菱镁通风道自重轻、强度高，能大幅度降低建筑物的承受荷载

4. High quality and strength: Compared with traditional brick ventilation ducts, magnesite ventilation ducts have a light weight and high strength, which can significantly reduce the load-bearing capacity of buildings

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