... forging flange 3)open die forging 4)Precision Processed With 3200 and 1600 Tons of hydraulic machine, 5 ... of electro-hydraulic hammer, 2*6m and numerical control (NC) machine, large vertical lathe and horizontal lathe, 4m ... requirements to the material of products.All the materials comply with GB, JIS, ISO, ANSI, ASTM, BS, DIN, etc ... the entire production. carbon steel forged flange with new technology