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The ventilation pipe manufacturer stated that the provisions for the connection of metal air ducts include: the seam of the air duct plate splicing should be staggered, and there should be no cross seam; When the air duct is connected by flange, if the flange material specification and bolt specification are higher than the specification, the material will be wasted to a certain extent. If the flange material specification and bolt specification are lower than the specification, the tightness and strength of the connection will be difficult to be guaranteed, and the material specification used should comply with the relevant provisions.

金屬風管的連接方式主要有4種，分別是：抱箍式連接、抱箍式連接、插條式連接和軟管式連接，其中抱箍使用于圓通風管和螺旋通風管連接，抱箍式是圓形和矩形的鏈接使用，插條式用于矩形連接，軟管式的用在風管和部件之間的連接。

There are four main connection methods for metal air ducts, namely, hoop type connection, hoop type connection, strip type connection and hose type connection. The hoop type is used for the connection of round ventilation ducts and spiral ventilation ducts, the hoop type is used for circular and rectangular connection, the strip type is used for rectangular connection, and the hose type is used for the connection between air ducts and components.

金屬風管連接應注意1、將部件和設備連接到負載空氣管時，須安裝單獨的支架和吊架，而支架和吊架不能用作空氣管的吊架，距排氣、空氣閥和自動控制機構的距離大于200mm。

Attention shall be paid to the connection of metal air duct. 1. When connecting components and equipment to the load air duct, separate supports and hangers must be installed. The supports and hangers cannot be used as hangers for air ducts, and the distance from the exhaust, air valve and automatic control mechanism is greater than 200 mm.

2、風道應垂直安裝，支架之間的距離不應超過2.4m，每個立管上的支架數量至少應為2，支架與風道之間的接觸面積應適當增加。3、如果水平懸掛的主風管的長度超過20m，則應安裝防抖固定支架，每個系統應安裝兩個。

2. The air duct shall be installed vertically, the distance between supports shall not exceed 2.4m, the number of supports on each riser shall be at least 2, and the contact area between supports and air duct shall be increased appropriately. 3. If the length of the horizontally suspended main air duct exceeds 20m, anti shake fixing brackets shall be installed, two for each system.

4、通風管道廠家表示空氣管和空氣管之間的管道部分通過特殊的法蘭連接器連接，插入插件后，用密封膠將空氣管四個角上的其余孔緊密密封，并安裝這些角。5、連接復合空氣管和法蘭閥零件、設備等時，請使用滿足要求強度的F型或4型專用接頭，并在接頭和法蘭之間使用密封性能良好且撓性高的墊圈。連接部分和法蘭應平整無缺點，不應有明顯變形，固定螺栓之間的間隙不應超過100mm，法蘭的四個角應有螺栓孔。

4. The manufacturer of the ventilation pipe said that the pipe between the air pipe and the air pipe is connected by a special flange connector. After the plug-in is inserted, the remaining holes on the four corners of the air pipe are tightly sealed with sealant, and these corners are installed. 5. When connecting the composite air pipe and flange valve parts, equipment, etc., please use F or 4 type special joints that meet the required strength, and use gaskets with good sealing performance and high flexibility between the joints and flanges. The connecting part and flange shall be flat without defects and obvious deformation. The clearance between fixing bolts shall not exceed 100mm. Four corners of the flange shall have bolt holes.

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