1) OD: up to 5,500mm 2) Standard: ASME, ANSI, API, JIS, JPI, DIN, ... 12821-80 carobn steel FLANGE2.1/2(DN15)to 80(DN2000).WE export to America, Canada, Germany, Spain,nertherland ,Russia, Italy ,U.A ... flanges and forging parts that customer required.If you want to purchase the carbon steel forged flange , please send your enquiry ...