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Welded Flanged Duct

Our KB Duct brand offers duct with and without flanges (angle rings) in black iron, galvanized or stainless steel, and with or without holes. We can manufacture flanged duct from 3” all the way up to the size you could drive a truck through, and we can manufacture lighter gauges to full welded product in heavy gauge (even up to 1/4″), all depending upon the application.

With our Welded Flanged Duct, the flanges are welded to the duct, either continuously for a full weld or intermittently, and the faces of the flanges are mated together.


  • Low Total Cost of Ownership
  • High reliability with custom manufactured flanged ducts to fit your application needs starting at 3″


  • Material integrity – Premium quality materials for even the most abrasive applications
  • Flanged duct is available in lengths up to 20′ depending on diameter
    • 16-gauge and heavier, seam welded
    • 25″ diameter and above are seam welded
  • Standard flanges are galvanized. Available also in stainless steel or black iron
  • Available in heavier gauges and larger sizes.

KB Duct Welded Flanged Duct

KB Duct produces superior ducting systems with options for addressing your every need, providing unmatched quality and thoroughness. We offer customized products: If you can explain it, we can create it! Our free 3D design service will turn your rough idea into a fully developed drawing of your duct solution that we construct and deliver to your door. Our turnaround time is the fastest in the industry. When you need the right product, fast, turn to KB Duct. 

KB Duct is committed to making the right equipment for you the same way you are committed to your company.  Our selection of ducting components and application-specific duct solutions for dust and air handling is the largest available. Despite your location, we will build, deliver, and install your system for you. Our attention doesn’t end when production ends. Even after we’ve installed your solution, KB Duct will be there to handle any issue, no problem. We are as dedicated to our products as we are to our clients who use them. Trust KB Duct.