[Class : 17] Ms, Ss, Pp, Hdpe, Frp, Plastic And G. I ., Fiber Glass Reinforced Plastic (Frp) Composite Vessels, Piping, Fittings And Structurals, R. O. Pressure Tubes, Frp Sheets, Composite Sheets, Rubber Lining Of Various Tanks, Vessels And Piping .