TPG FRP is made using the continuous advancing mandrel (filament wound) process, the next-generation manufacturing method for glass-reinforced pipe production. It’s a compressed laminate made from glass fiber, resin, and sand, applied to a neutral axis using a dual-resin delivery system. A sand fortifier provides additional stiffness by adding extra thickness. Using the filament winding process, other materials such as a polyester or glass veil can be used to further enhance the abrasion and chemical resistance of the pipe.