Ventilation Duct Installation Requirements

When installing air ducts, check the quality of galvanized steel sheets, angle steel and accessories used for making air ducts. Installation of air ducts without factory certificate or quality appraisal documents shall not be used. The surface of the galvanized steel sheet should be flat, uniform in thickness, without obvious crushing phenomenon, and should not have defects such as cracks, scars, burrs, rust, watermarks, etc., and should have galvanized layer crystal patterns; Tube processing is free from cracks, twists and other defects that affect quality. Install the air duct to check the quality of the galvanized steel sheet, angle steel and accessories used for the production of the air duct. Those who do not have the factory certificate or quality appraisal document shall not use it. And the surface of the galvanized steel sheet should be flat, uniform in thickness, without obvious crushing phenomenon, and should not have defects such as cracks, scars, thorns, rust, watermarks, etc., and there should be a galvanized layer crystal pattern; the angle steel should be uniform and free of Crack distortion and other defects that affect quality. 3. When installing the riser pipe clamp, the air duct processing factory first fixes the top pipe fitting, and then uses a wire hammer to hang the wire in the center, and the lower pipe clamp can be fixed according to the line. 4. If there is no design requirement for the spacing of the air duct brackets, the non-insulated air ducts should meet the requirements in the following table. If there is no design requirement for the spacing between the supports and hangers of the heat-insulating air duct, the spacing requirements in the table should be multiplied by 0.85. The distance between the helical air duct support rod and the hanger rod can be appropriately increased.

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