1, galvanized spiral air duct horizontal installation, diameter or long side size is less than or equal to 400mm, spacing should not be greater than 4m; greater than 400mm, should not be greater than 3m. The distance between the support and hanger of spiral galvanized spiral duct can be extended to 5M and 3.75m respectively, and the distance between the support and the hanger should not be more than 3m for the galvanized spiral wind pipe of the thin plate flange.

2、镀锌螺旋风管垂直安装，间距不应大于4m，单根直管至少应有2 个固定点。

2. The vertical installation of galvanized spiral air duct should not be more than 4m, and a single straight pipe should have at least 2 fixed points.

3、镀锌螺旋风管支、吊架宜按国标图集与规范选用强度和刚度相适应的形式和规格。对于直径或边长大于2500mm 的超宽、超重等特殊镀锌螺旋风管的支、吊架应按设计规定。

3. Galvanized spiral duct supports and hangers should be chosen according to the national standard atlas and specification. For the special zinc coated spiral pipes with diameter or side length larger than 2500mm, the supports and hangers should be designed according to the design requirements.

4、支、吊架不宜设置在风口、阀门、检查门及自控机构处，离风口或插接管的距离不宜小于200mm。

4, the support and hangers should not be installed in the tuyere, valve, check door and automatic control mechanism. The distance from the outlet or the nozzle should not be less than 200mm.

5、当水平悬吊的主、干镀锌螺旋风管长度超过20m 时，应设置防止摆动的固定点，每个系统不应少于1 个。

5. When the length of the main and dry galvanized spiral pipes with a horizontal suspension exceeds 20m, a fixed point should be set up to prevent swing, and no more than 1 systems should be used.

6、吊架的螺孔应采用机械加工。吊杆应平直，螺纹完整、光洁。安装后各副支、吊架的受力应均匀，无明显变形。镀锌螺旋风管或空调设备使用的可调隔振支、吊架的拉伸或压缩量应按设计的要求进行调整。

6, the screw hole of the hanger should be machined. The hanger should be straight, complete and smooth. After installation, the force of each auxiliary branch and hanger should be uniform without obvious deformation. The drawing or compression amount of adjustable vibration isolation hangers and hangers used for galvanized spiral pipes or air conditioners should be adjusted according to the design requirements.