Listing ID #7152512
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Contact SupplierAryash Air tech manufactures spiral duct using special machine which is formed from a metal strip into a rigid steel tube with a 4-ply spiral lock seam. The four-ply spiral lock seam serves as a continuous reinforcing rib, boosting the pipe's crushing resistance to more than twice that of longitudinal lock seam or welded pipe.
WHY SPIRAL DUCT OVER RECTANGULAR ?