Steel-plastic composite anticorrosion pipe is made up by metal thin wall pipe lining engineering plastic pipe, its liner material is glass fiber reinforced polypropylene (FRPP), engineering grade of polypropylene (PP), high density polyethylene (HDPE) and ultra-high molecular weight polyethylene (UHMW-PE), PTFE lined pipe fittings. FRPP pipe and PP pipe corrosion resistance optimum, HDPE pipe health non-toxic, low temperature performance, UHMW-PE pipe wear no scaling. Its specifications is DN20 ~ DN600, flange connection mode is flange (loose flange) connection.