Installation of galvanized air duct stipulates that protective duct should be installed in the fire wall. The thickness of duct should not be less than 1.6MM. The duct and iron air duct should be sealed with non-combustible heat preservation material (such as rock wool). The suspender should be straight, with complete threads and smooth threads. After installation, the force of each auxiliary support and hanger should be uniform without obvious deformation.
抱箍支架，折角应平直，抱箍应紧贴并箍紧镀锌螺旋风管。安装在支架上的圆形镀锌螺旋风管 应设托座和抱箍，其圆弧应均匀，且与镀锌螺旋风管外径相一致。 检查数量:按数量抽查10%，不得少于1 个系统。
Holding hoop bracket, folding angle should be straight, holding hoop should be close to and tighten galvanized spiral air duct. The circular galvanized spiral air duct installed on the bracket shall have bracket and hoop, and its arc shall be uniform, and the outer diameter of the galvanized spiral air duct shall be in line with that of the galvanized spiral air duct. Inspection quantity: 10% by quantity, not less than one system.
检查方法:尺量观察检查，年来，复合玻纤风管广泛运用于建筑工程中，与传统的镀锌铁皮风管加保温相比，复合玻纤风管具有材质轻、占用建筑空间小、外观美观光滑、加工安装简便等诸多优点，是理想的中央空调通风管道。 ,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。
Inspection method: Size observation and inspection. Over the years, composite glass fibre duct has been widely used in construction engineering. Compared with traditional galvanized iron sheet duct with heat preservation, composite glass fibre duct has many advantages, such as light material, small occupied building space, beautiful appearance, simple processing and installation, etc. It is an ideal ventilation duct for central air conditioning. When the length of main and dry galvanized spiral air ducts of horizontal suspension exceeds 20 m, fixed points should be set to prevent swing, and each system should not be less than one.
镀锌螺旋风管水平安装，直径或长边尺寸小于等于400mm，间距不应大于4m；大于 400mm，不应大于3m。螺旋镀锌螺旋风管的支、吊架间距可分别延长至5m 和3.75m；对于薄钢板法兰的镀锌螺旋风管，其支、吊架间距不应大于3m。,吊架的螺孔应采用机械加工。,白铁皮风管穿墙时应用不燃保温材料封堵如岩棉。
Galvanized spiral air duct installed horizontally, diameter or long side size less than or equal to 400 mm, spacing should not be greater than 4 m; greater than 400 mm, should not be greater than 3 m. The spacing of brackets and hangers of spiral galvanized spiral ducts can be extended to 5 m and 3.75 m, respectively. For galvanized spiral ducts with thin steel flanges, the spacing of brackets and hangers should not be greater than 3 m. The screw holes of the hanger shall be machined. When the white iron duct passes through the wall, it should be sealed with non-combustible heat preservation materials such as rock wool.
铁皮风管安装调直后应就法兰连接部位重新用阻燃密封胶密封。 ,铁皮风管吊杆与托架联接时固定螺母托架上部一个、下部两个，并加防振橡胶垫厚10MM ，以防铁皮风管振动时螺母松动。,铁皮风管支吊架距风阀、风口、检查门至少应保持200间
Flame-retardant sealant should be used to seal the flange joints after the installation and straightening of the sheet air duct. The upper and lower parts of the fixed nut bracket are connected with the suspender of the sheet iron duct, and the thickness of the anti-vibration rubber pad is 10MM to prevent the nut from loosening when the sheet iron duct is vibrated. At least 200 air valves, air outlets and inspection doors should be maintained from the support and hanger of the iron duct
The tension or compression of adjustable vibration isolation brackets and hangers for galvanized spiral air ducts or air conditioning equipment should be adjusted according to the design requirements. Flame retardant sealant should be re-used to seal the flange joints after installation and straightening of the sheet air duct. The brackets and hangers should not be set at the tuyeres, valves, inspection doors and automatic control mechanisms, and the distance from the tuyeres or nozzles should not be less than
200mm。,白铁皮风管穿墙时应用不燃保温材料封堵如岩棉。 ,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。
200mm. When the white iron duct passes through the wall, it should be sealed with non-combustible heat preservation materials such as rock wool. The galvanized spiral air duct should be installed vertically with spacing not greater than 4m, and a single straight duct should have at least two fixed points.
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