Spiral air duct is a thin-walled pipe with spiral seam made of metal strip coil. It is round, non-welded, non-leaking and non-leaking. It is mostly used for air supply and bulk material transportation instead of traditional white iron pipe (i.e. manual seam-biting iron pipe). It is a kind of air duct, full mechanism, straight pipe does not need to be knocked by hand.

　　其主要用途如下：

　　Its main uses are as follows:

　　(1)送風，包括通氣，如送鮮風和排氣，這個范圍很廣，如工廠車間，生產場地空氣，由于有害氣體產生需要排出室外，又需要把室外空氣輸送室內。這時就要使用流量大而壓力小的空氣輸送管道，螺旋風管就適用，一般情況下使用鍍鋅鐵管，有腐蝕性及特別潮濕場所使用不銹鋼管。

　　(1) Air supply, including ventilation, such as fresh air supply and exhaust gas, covers a wide range of areas, such as factory workshops and production sites. Because of the generation of harmful gases, it needs to be discharged outdoors, and outdoor air needs to be conveyed indoors. At this time, it is necessary to use air conveying pipelines with large flow and low pressure. Spiral air ducts are most suitable. Generally, galvanized iron tubes are used, and stainless steel tubes are used in corrosive and especially humid places.

　　(2)送冷風。常見的是空調的管道，這種管道需要加保溫材料。螺旋風管可內貼保溫材料，外表看來美觀。

　　(2) cold air supply. The most common is the central air-conditioning pipeline, which requires insulation materials. The spiral air duct can be insulated with heat preservation material and has a beautiful appearance.

　　(3)排油煙。飯店、酒樓、賓館的廚房均有大量油煙產生，需要排出，使用圓形的風管就是油煙囪。在這里，螺旋風管該叫做油煙管。

　　(3) Fume exhaust. The kitchens of restaurants, restaurants and hotels all have a lot of oil fumes, which need to be discharged. The use of circular air ducts is the oil chimney. Here, the spiral duct should be called lampblack.

　　(4)除塵。有些工廠生產車間很多塵埃，需要專門的除塵裝置，其中風流量較大的管道，可使用螺旋風管。(5)散裝物料輸送。有些工廠的生產過程中，需要輸送松散的顆粒，特別是比重不大的如發泡塑料粒之類的使用螺旋風管造價低、效果好。

　　(4) dust removal. In some factories, there is a lot of dust in the workshop, and special dust removal devices are needed. The spiral duct can be used in the pipeline with larger air flow. (5) Bulk material transportation. In the production process of some factories, loose particles need to be transported, especially those with small proportion, such as foamed plastic particles, which use spiral air duct with low cost and good effect.

　　產品特點與手工敲制的傳統白鐵管比較，機制的螺旋風管具有以下優點：

　　Compared with the traditional white iron pipe made by hand, the spiral air duct with mechanism has the following advantages:

　　(1)密封性好。(2)強度與剛性均好。

　　(1) Good sealing. (2) Both strength and rigidity are good.

　　(3)通風阻力小，通風噪聲小，圓管優于方管。

　　(3) Ventilation resistance is small, ventilation noise is small, circular pipe is better than square pipe.

　　(4)安裝方便，連接點少。

　　(4) Easy to install and few connecting points.

　　(5)檔次高，外表美觀。

　　(5) High grade, beautiful appearance.

　　使用材料

　　Materials used

　　材質常用鍍鋅鐵帶（俗叫星鐵），不銹鋼帶，軟鋁帶。材料厚度：0.31.2毫米材料寬度：125毫米制管直徑φ125φ1500毫米（直徑與厚度適當配合），無級選擇。

　　Material commonly used galvanized iron strip (commonly known as star iron), stainless steel strip, soft aluminum strip. Material Thickness: 0.3 to 1.2 mm Material Width: 125mm Tube Diameter 125 to 1500mm (Diameter and Thickness Match Appropriately), Stepless Selection.

　　通風工程降低造價方法

　　Cost Reduction Method for Ventilation Engineering

　　由于螺旋風管有骨（螺旋形咬縫）可提高強度30%，故可選用較薄的材料，比如0.8毫米的厚度可改為0.6毫米。

　　Because the spiral duct has bone (spiral bite) which can increase the strength by 30%, thinner materials can be selected, such as 0.8 mm thickness can be changed to 0.6 mm.

　　如果您有山東通風管道加工的需求可以點擊我們的官網進行咨詢：http://www.pvcbox.cn/

　　If you have the requirement of Shandong ventilation pipeline processing, you can click on our official website for consultation: http://www.pvcbox.cn/