How is FRE® Reinforced Thermosetting Resin Conduit manufactured?
FRE® conduit is manufactured using a filament winding process in which fiberglass strands or rovings are pulled through either an epoxy or phenolic resin bath and then wrapped around a revolving mandrel which is controlled by a computerized winding machine. These rovings are laid over the mandrel at a predetermined angle, which establishes key product mechanical properties, while the number of passes determines the wall thickness. Once the resin is fully cured, the conduit is extracted off the mandrel and cut to length. 2. What diameters and lengths are available? FRE® conduit is available in trade sizes ranging from ¾” (19 mm) to 8″ (203 mm) for Iron Pipe Size (IPS) dimensions and from 2″ (51 mm) to 6″ (152 mm) for Inside Diameter (ID) dimensions. All products are available in either 9.84 foot (3 meter) or 19.68 foot (6 meter) lengths. Conduit smaller than the 2″ (51 mm) trade size is only available in 9.84 foot (3 meter) lengths. Larger diameters may be available upon request. 3. How
