Profile: Spiral Manufacturing Company, Inc provides commercial, industrial spiral pipe and fittings. We provide spiral pipe, flex hose, blast gates, elbows, angle iron rings, clean outs, dust nozzles for dust collection, HVAC, ventilation, concrete, fume, seed and paper trim systems standard or custom made. We carry a complete line of high & low pressure duct work. Spiral pipe combines the economies of light gauge metal with a spiral lockseam construction that assures maximum strength and rigidity.