Reinforcement method of Air Duct
⑴ Processing and reinforcement of shaped straight air ducts The length of circular straight air ducts is determined comprehensively according to the system processing and installation sketch considering the convenience of transportation and installation, standard specifications of plates, and material saving. Generally, it should not exceed 4m. The circular air duct itself has high strength, and the reinforcement of the air duct itself is generally no longer considered.When the diameter is greater than 700mm and the distance between flanges at both ends is large, a 25×4 flat steel reinforcement ring is added every 1.2m and fixed on the air duct with rivets.

⑵ Processing and reinforcement of rectangular air ducts The rectangular straight air ducts can be processed and manufactured after blanking;When the total length around the air duct is less than the standard width of the plate, that is, when the entire width of the steel plate is folded and formed, only one corner bite can be provided;When the width of the plate is less than the circumference of the air duct and greater than half of the circumference, two corner bites can be provided; when the circumference of the air duct is large, four corner bites can be provided at the four corners of the air duct.