Duct is a piping system for air delivery and distribution. The air duct processed by air duct includes composite air duct and inorganic air duct. Spiral duct and rectangular duct can be classified according to section shape and material. Air duct fabrication Stainless steel air duct fabrication is to apply sealant on seaming seams, rivet seams, flange flanging corners and other joints, and remove dust and oil stains on the surface before applying sealant.

螺旋風管的安裝顯著地減少了管與管之間的連接點，使管件結合部的泄漏減少到程度，典型的螺旋風管長度是3~6m，而典型的矩形風管的長度只有1~1.5m；且連接兩個螺旋風管只需一個管接件，而傳統的矩形風管的連接則常常需要一個完全獨立的雙法蘭系統。

The installation of spiral air duct significantly reduces the connection points between pipes and reduces the leakage at the joint of pipe fittings to a certain extent. The typical spiral air duct is 3-6m long, while the typical rectangular air duct is only 1-1.5m long; The connection of two spiral air ducts only requires one pipe connector, while the connection of traditional rectangular air ducts often requires a completely independent double flange system.

螺旋風管的配件的生產已高度自動化、系統化，并具有工業化的質量控制。螺旋風管系統的安裝時間只有相類似的矩形管道的1/3。大家都知道螺旋風管的風阻比矩形風管的風阻要小得多。

The production of spiral air duct fittings has been highly automated and systematic, and has industrialized quality control. The installation time of spiral air duct system is only 1/3 of that of similar rectangular ducts. As we all know, the wind resistance of spiral air duct is much smaller than that of rectangular air duct.

精密的咬口成型工藝：進口設備所采用的模具均為特種鋼材結構，即使使用了三五年，其壓制模具的表面仍保持不變，使得鍍鋅鋼板的表面不受損傷，大大的延長了螺旋風管的使用壽命，同時接縫均勻平整、咬口緊密、連接力強、密封性好。

Precise seaming forming process: the molds used by imported equipment are all of special steel structure. Even after three or five years of use, the surface of the pressing mold remains unchanged, making the surface of galvanized steel plate not damaged, greatly extending the service life of spiral air duct. At the same time, the joint is even, flat, the seaming is tight, the connection force is strong, and the sealing is good.

螺旋風管安裝的時候，要求吊架的螺孔應采用機械加工，且在設備安裝后，不會有變形；其支、吊架間距，長為5米和3.75米，不能超過這個范圍。如是垂直設備，那么其間距不能大于4米；如是水平設備，假如直徑或長邊尺寸不大于400毫米，那么其間距不能大于4米；假如直徑或長邊尺寸大于400毫米，那么其間距不能大于3米。

When installing the spiral air duct, it is required that the screw hole of the hanger shall be machined, and there shall be no deformation after the equipment is installed; The spacing between supports and hangers is 5m and 3.75m, which cannot exceed this range. If it is vertical equipment, its spacing shall not be greater than 4m; For horizontal equipment, if the diameter or long side size is not greater than 400mm, the spacing shall not be greater than 4m; If the diameter or long side size is greater than 400mm, the spacing shall not be greater than 3m.