Round Duct Mounting Flange

Round duct mounting flanges, also known as companion rings or angle rings, are used to connect ductwork and tube axial fans together. Constructed from mild steel and powder coated for excellent corrosion resistance. Our mounting flanges are easily attached to the ductwork using self drilling screws. Mounting flanges can also be welded directly to the ductwork. The pre-punched bolt holt pattern allows for ductwork to be easily bolted together. Available in a wide range of standard and custom sizes, up to 60″ duct diameter.