Galvanized spiral duct refers to the air supply, exhaust, and smoke exhaust ducts used in hotels, shopping malls, textiles, chemical fibers, petrochemicals, machinery manufacturing, instrumentation, electronics, pharmaceuticals, tobacco, food, medical, warehousing, office buildings, as well as subway, civil air defense, basements, and other engineering projects. Its thickness and specifications can vary according to engineering requirements.

Beautiful appearance and high strength: Galvanized spiral ducts have a beautiful appearance and high strength, which can meet the requirements of various engineering projects for ventilation ducts.
Good sealing performance: The two ends of galvanized spiral ducts are usually externally connected to fittings such as elbows, flanges, etc., and are equipped with sealing rings to ensure the sealing of the pipeline connection.
Easy installation and long service life: galvanized spiral ducts are lightweight, easy and fast to install, and have a long service life due to their good corrosion resistance.
Smooth inner and outer walls, low resistance: The inner and outer walls of galvanized spiral ducts are very smooth, with low air duct resistance and no noise generated during use.
Easy maintenance and reduced energy consumption: Galvanized spiral ducts basically do not require maintenance, and due to their low resistance, they can reduce energy consumption and save costs.

Vertical installation spacing: When installing galvanized spiral ducts vertically, the spacing should not exceed 4 meters, and a single straight pipe should have at least 2 fixing points.
Selection of Supports and Hangers: The supports and hangers for galvanized spiral ducts should be selected in accordance with the national standard drawings and specifications, with forms and specifications that are suitable for strength and stiffness. For the supports and hangers of special galvanized spiral ducts with a diameter or side length greater than 2500mm, such as ultra wide and overweight, they should be designed according to the regulations.
Position of supports and hangers: Supports and hangers should not be placed at air vents, valves, inspection doors, and automatic control mechanisms, and the distance from air vents or connecting pipes should not be less than 200mm.
Fixed points to prevent swinging: When the length of the main and dry galvanized spiral ducts suspended horizontally exceeds 20 meters, fixed points to prevent swinging should be set up, and each system should have no less than one.
Hanger screw holes and installation: The screw holes of the hanger should be machined, and the hanger rod should be straight, with complete and smooth threads. After installation, the stress on each auxiliary support and hanger should be uniform and there should be no obvious deformation. The tension or compression of adjustable vibration isolation supports and hangers used in galvanized spiral ducts or air conditioning equipment should be adjusted according to the design requirements.

The manufacturing process of galvanized spiral ducts includes steps such as material selection, cutting, flanging treatment, welding, cleaning and inspection, drilling, assembly, inspection and testing. Each step needs to be strictly followed according to the operating procedures to ensure the quality and performance of the air duct.

Regular inspection: Regularly inspect the appearance of the spiral duct for any damage, deformation, or corrosion, and promptly repair or replace damaged components.
Sealing inspection: Check whether each connection is well sealed and whether there is any air leakage. If there is any air leakage, the sealing gasket should be replaced or the bolts should be tightened again in a timely manner.
Bracket inspection: Check whether the bracket is stable, loose or deformed. If necessary, the bracket should be reinforced or replaced in a timely manner.
Regular cleaning: Regularly clean the dust and dirt inside and outside the spiral duct according to the usage environment and frequency. Special cleaning agents and tools can be used for cleaning to keep the air duct unobstructed.