>   FRP PIPE WITH SAND FILLER“ Filament winding FRP pipe with sand filler is the pipe that adopted the glass fiber and products as its reinforced material, unsaturated polyester resin as its body material, quartz sand as its filler and equipped with the stipulated length winding technique, which possesses the merits of lightness and high strength, distinguished properties of water-fast and corrosion resistance, excellent hydraulic property, good hermetical property of joint without poison