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There will be various problems in the installation of ventilation pipes. Here are some common problems and solutions for reference:

1.風管系統采用組合式法蘭連接時，容易出現接口漏風問題，可以對風管咬口縫、無法蘭插條接縫處及孔洞縫隙處進行用密封膏處理；法蘭墊料需要采用不透氣、彈性好、不易老化的連接材料，厚度3～5mm，寬度大于10mm。

1. when the air duct system adopts the combined flange connection, it is easy to have the problem of air leakage at the interface. The air duct seaming joint, the joint without flange insert and the hole gap can be treated with sealing paste; The flange gasket shall be made of airtight, elastic and aging resistant connecting materials, with a thickness of 3 ~ 5mm and a width of more than 10mm.

2.如果是磚結構風道與金屬風管連接處不嚴密，施工時按要求在連接處設置預埋件，或要求土建單位進行堵封，確保連接嚴密。

2. if the connection between the brick structure air duct and the metal air duct is not tight, the embedded parts shall be set at the connection as required during construction, or the civil engineering unit shall be required to block and seal to ensure the tight connection.

3.柔性短管、矩形短管安裝時產生扭曲；安裝時注意短管四角平直，松緊適度，高度一致，同一角度應在同一垂線或直線上。長度值為150～250mm之間，接縫處用嚴密和牢固。

3. the flexible short pipe and rectangular short pipe are twisted during installation; During installation, the four corners of the short pipe shall be straight, with appropriate tightness and consistent height. The same angle shall be on the same vertical line or straight line. The length is 150 ~ 250mm, and the joint is tight and firm.

4.設備連接的回風口噪聲大；解決這一問題，主要從風口材料和風口固定兩個方面進行，選擇符合標準要求的材料，加強驗收，安裝需加強與土建配合。

4. the return air outlet connected to the equipment is noisy; To solve this problem, it is mainly carried out from two aspects: tuyere material and tuyere fixation. Select materials that meet the standard requirements, strengthen the acceptance, and strengthen the cooperation with the civil engineering discipline for installation.

5.管道焊接未很好熔合；可以選用稍大的電流，放慢焊速，并調整電弧角度，同時注意對焊接夾渣的防治

5. pipeline welding is not well fused; A slightly larger current can be used to slow down the welding speed, adjust the arc angle, and pay attention to the prevention of welding slag inclusion

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