1、镀锌螺旋风管需要水平安装，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。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。
1. The galvanized spiral air duct shall be installed horizontally, with the diameter or long side size less than or equal to 400mm and the spacing not greater than 4m; More than 400mm, not more than 3m. The spacing between supports and hangers of galvanized spiral air duct can be extended to 5m and 3.75m respectively; For galvanized spiral air duct with thin steel plate flange, the spacing between supports and hangers shall not be greater than 3m.
2. The support and hanger of galvanized spiral air duct shall be in the form and specification appropriate to the strength and stiffness according to the national standard atlas and specifications. The supports and hangers of super wide, overweight and other special galvanized spiral air ducts with a diameter or side length greater than 2500 mm shall comply with the design requirements.
3. The screw hole of the hanger shall be machined. The suspender shall be straight, with complete and smooth threads. After installation, the stress of each auxiliary support and hanger shall be uniform without obvious deformation. The tension or compression of adjustable vibration isolation supports and hangers used for galvanized spiral air ducts or air conditioning equipment shall be adjusted according to the design requirements.
4. The galvanized spiral air duct shall be installed vertically, and the spacing shall not be greater than 4m. A single straight pipe shall have at least 2 fixing points.
5. The supports and hangers should not be set at the tuyere, valve, inspection door and automatic control mechanism, and the distance from the tuyere or plug pipe should not be less than 200mm.
6、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。
6. When the length of the horizontally suspended main and dry galvanized spiral air duct exceeds 20m, a fixed point to prevent swing shall be set, and each system shall not be less than one.
7. The galvanized spiral air duct shall be installed vertically, and the spacing shall not be greater than 4m. A single straight pipe shall have at least 2 fixing points.
8. Inspection quantity: spot check 10% of the quantity, not less than 1 system.
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