1.name:ASTM A 16.5 carbon steel Flange 2.Brand; Dong Shou 3.Material: carbon steel 4.Standard: ASTM A 16.5, ASTM A16.47 ... ,ISO, nameASTM A 16.5 carbon steel Flangeshapesocket weld flange, threaded ... -galvanized, etc.Applicationspetroleum, gas, chemical, metallurgy, electric station, shipbuilding, construction ASTM A 16.5 carbon steel Flange