1.name:carbon steel flange ring 2.Brand; Dong Shou 3.Material: carbon steel 4Standard: ASTM ... steel Flange ringkindsocket weld flange, threaded flange, lap joint flange, ring joint flangeSize1/2"to 72" MaterialCarbon Steel, Stainless Steel, Alloy ... , gas, chemical, metallurgy, electric station, shipbuilding, construction carbon steel Flange Ring