1.name:carbon steel flange ring 2.Brand; Dong Shou 3.Material: carbon steel 4Standard: ... A16.47,ISO,DIN,GB,B namecarbon steel Flange ringkindsocket weld flange, threaded flange, lap joint flange, ring joint flangeSize1/2"to 72" MaterialCarbon ... .Applicationspetroleum, gas, chemical, metallurgy, electric station, shipbuilding, construction carbon steel Flange Ring