Spunstrand Inc. has been manufacturing filament wound fiberglass reinforced plastic duct and piping for over forty years. Variations in resin, glass, liners, wall thickness, and their applications in corrosive air, HVAC, or fluids, are as diverse as the markets we serve. We have made just about every size and shape imaginable and even provided insulated industrial ductwork. We also have an FDA-approved insulated duct for use in food manufacturing plants. The standard guide specification we use is centered around the National Bureau of Standards PS 15-69 and/or the new SMACNA Thermoset FRP Duct construction manual. We also manufacture various ASTM specifications, ANSI, Military specs, and many custom application specifications. We do more custom spec work and spec writing than most FRP manufacturers due to the diversity of product lines, personnel, and years of FRP experience.
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