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

1.风管系统采用组合式法兰连接时，容易出现接口漏风问题，可以对风管咬口缝、无法兰插条接缝处及孔洞缝隙处进行用密封膏处理；法兰垫料需要采用不透气、弹性好、不易老化的连接材料，厚度3～5mm，宽度大于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.如果是砖结构风道与金属风管连接处不严密，施工时按要求在连接处设置预埋件，或要求土建单位进行堵封，确保连接严密。

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、矩形短管安装时产生扭曲；安装时注意短管四角平直，松紧适度，高度一致，同一角度应在同一垂线或直线上。长度值为150～250mm之间，接缝处用严密和牢固。

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.设备连接的回风口噪声大；解决这一问题，主要从风口材料和风口固定两个方面进行，选择符合标准要求的材料，加强验收，安装需加强与土建配合。

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；可以选用稍大的电流，放慢焊速，并调整电弧角度，同时注意对焊接夹渣的防治

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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The above is Shandong ventilation duct http://www.jntfgd.com Thank you for checking the information of our company in your busy schedule. If you want to know more, you are welcome to call us for consultation!