Fabricating a FRP pipe assembly with Van Stone flanges. Composites USA manufactures corrosion resistant FRP pipe, duct and tanks for chemical processing. Usually fiberglass flanges are used to join from pipe assemblies to each other. However in the case of high pressure pipe, often Van Stone flanges which are drilled steel flanges are used up against an FRP hub to provide higher torque stress. #vanstoneflanges #vinylesterresin #frp #fiberglassduct #fiberglasstanks #fiberglasspipe #composites #co