... 21.3mm-OD219mm) 34.Wall Thickness:0.8mm-18mm Galvanized steel pipe1.Standard: ASTMA53,BS1387-1985,GB/T3091-2001,EN39, ... Plain, Beveled, Thread With Couplings Or Sockets;Plastic Caps And Steel Rings Can Be Provided If Possible7.Packing: 1) Big OD ... used in the construction, pipe of industrial,water pipe, plastic-steel doors and windows, fence equipment,telecommunication tubes as well as greenhouse ...