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Using spiral duct is more economical than traditional rectangular duct

1.相同的環境與條件下，可由低速排風調整至高速排風，系統設計可減少風管總量，不僅經濟，而且節約空間

1. Under the same environment and conditions, it can be adjusted from low-speed exhaust to high-speed exhaust. The system design can reduce the total amount of air duct, which is not only economical, but also saves space

2.同等條件下滿狀輔材（吊鍵等）結果簡單，數量少，安裝輔材造價降低20%到35%

2. Under the same conditions, the results of full auxiliary materials (hanging keys, etc.) are simple, the quantity is small, and the cost of installing auxiliary materials is reduced by 20% to 35%

3.施工時吊裝效率比矩形風管提高一倍

3. During construction, the hoisting efficiency is twice as high as that of rectangular air duct

4.相比傳統矩形風管，螺旋風管的主材造價降低15%左右，同等管徑，板厚降低13-17%。主材造價降低.

4. Compared with the traditional rectangular air duct, the main material cost of spiral air duct is reduced by about 15%, and the plate thickness is reduced by 13-17% with the same pipe diameter. The cost of main materials is reduced

螺旋風管比傳統矩形風管更具備優越性

Spiral duct has more advantages than traditional rectangular duct

1.)圓形風管比矩形風管結構更加合理，在降低降低顫震噪音方面要優于傳統矩形風管

1.) the structure of circular air duct is more reasonable than that of rectangular air duct, and it is better than traditional rectangular air duct in reducing vibration noise

2.)連接部件少，在系統通風質量與密封性能方面螺旋風管比矩形風管要好

2.) there are few connecting parts, and the spiral air duct is better than the rectangular air duct in terms of system ventilation quality and sealing performance

3.)螺旋風管外型比矩形風管更美觀

3.) spiral air duct is more beautiful than rectangular air duct

風管采用鍍鋅鋼板，其厚度應符合GB50243-2002下表選用以下規定。形風管的彎管，可采用內弧型或內斜線矩形彎管。當邊長A大于或等于500mm時，應設置彎管導流片。矩形風管的三通或四通，可采用分叉式或分隔式。風管與法蘭連接，翻邊應平整，寬度應一致且不小于6mm，并不得有開裂及孔洞，對角及翻邊縫應涂上密封膠。法蘭用料規格見下表： 風管法蘭制作應先做好模具。模具做好后檢查模具的幾何尺寸，對角線是否符合設計及規范要求，檢查無誤后進行下料、校直、鉆鉚釘孔（孔距不大于150mm）、組裝、焊接、鉆孔。另外對邊長大于800的風管應加固措施。風管及法蘭尺寸的允許偏差和檢驗方法見下表：

The air duct adopts galvanized steel plate, and its thickness shall comply with the following provisions in the following table of GB50243-2002. Inner arc or inner oblique rectangular elbow can be adopted for the elbow of V-shaped air duct. When the side length a is greater than or equal to 500mm, elbow deflector shall be set. The tee or cross of rectangular air duct can be bifurcated or separated. When the air duct is connected with the flange, the flanging shall be flat, the width shall be consistent and not less than 6mm, and there shall be no cracks and holes. The diagonal and flanging joints shall be coated with sealant. See the following table for the specifications of flange materials: the mold shall be made first for the fabrication of air duct flange. After the mold is completed, check whether the geometric dimension and diagonal line of the mold meet the design and specification requirements. After the inspection is correct, blanking, straightening, drilling rivet holes (hole spacing not greater than 150mm), assembly, welding and drilling shall be carried out. In addition, reinforcement measures shall be taken for air ducts with side length greater than 800. The allowable deviation and inspection method of the size of air duct and flange are shown in the following table:

風管安裝過程中，進行風管分段檢漏測試。風管制作安裝后，要檢驗合格才交付下步保溫工序。風管吊桿的末端要滿足調節風管標高的要求，吊桿制作好后，根據風管的布置位置進行安裝，水平風管的間距不大于3m，垂直風管不大于4m。風管支吊架、防火閥、電動風閥等部件安裝處須單獨設支吊架處，一般風管每隔3米左右設支吊架一個，支吊架的作法可參照采暖通風**標準圖集。風管支、吊架不得設置在風口、閥門、檢查門及自控機構處。吊桿不得直接固.

During the installation of air duct, conduct sectional leak detection test of air duct. After the air duct is manufactured and installed, it shall be delivered to the next insulation process only after passing the inspection. After the air duct is made, the vertical distance of the air duct shall not be greater than 4m, and the air duct shall be adjusted according to the elevation of the air duct at the end of the air duct, which shall not be greater than 4m. Air duct supports and hangers, fire dampers, electric air valves and other components shall be installed separately. Generally, air ducts shall be provided with supports and hangers every 3 meters. The method of supports and hangers can refer to the standard atlas of heating and ventilation * *. Air duct supports and hangers shall not be set at air outlets, valves, inspection doors and automatic control mechanisms. The suspender shall not be fixed directly

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