... flange, forging flange 3)open die forging 4)Precision Processed With 3200 and 1600 Tons of hydraulic machine, 5 Tons of ... requirements to the material of products.All the materials comply with GB, JIS, ISO, ANSI, ASTM, BS, DIN, etc. standard, which can ... will conduct throughout the entire production. carbon steel forged flange with new technology