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Speed and Profit!

AccuFlange was designed with one overriding goal: to save field labor. Actual time studies reveal savings up to 50% compared to other systems. It's so simple! Once you try it, you will never go back.

Versatility and Selection!

The patented AccuFlange™ connecting system, installed and sealed per Spinfinity's recommendations, is suitable for use on all systems across a range of internal duct pressures from 10" W.G. positive to 10" W.G. negative.

AccuFlange is available in singlewall and doublewall round and oval configurations. Choose from galvanized, paintgrip, stainless steel, aluminum, or plastic coated materials.

Round AF and Oval AF Accuflange Specs

* 6"-14" stainless and aluminum have a small face
Single Wall and Double Wall Specs


AccuFlange Product Sheet link



Round AccuFlange Installation GuideOval AccuFlange Installation GuideDouble-Wall AccuFlange Installation Guide

Convert rectangle to oval spiral the easy way!

Connect with Oval AccuFlange. It takes the pain out of oval and puts higher profits in your pocket.

  • Installs 30% to 50% faster than rectangle duct
  • Reduces number of field joints
  • Eliminates labor-intensive bolts and clips
  • No special tools required
  • Eliminates longitudinal seam assembly
  • Less reinforcement needed due to less flat span
  • 10% to 25% savings on wrapping insulation