material: stainless steel,carbon steel ,alloy steel flange and dual phase steel Standard: JIS,ANSI,UNI,DIN,NF, ... ASME,API,JPI,AWW Features: 1) Stainless steel flange and carbon steel flange 2) Standard: ASME, ANSI, API, JIS, JPI, DIN ... ) OD: up to 2,500mm 5) Production with anneal solution for stainless performance 6) Special design availableOuter packing: Seaworthy plywood case