... ,ASTM,MSS,JIS,DIN,EN HY carbon steel Welding Neck Flange We started to product flanges from 1986.With the rich experience ... of making and exporting flanges, our customers are from all over the world, such as ... , Australia, South Africa, and so on. We can provide forged carbon flanges, including slip-on flange, plate flange, and blind flange, etc ...