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, UNI, BS, AS 3) Material: 316L, 316Ti, 304L, 321, 321H, Rst37.2, C22.8 4) OD: up to 2,500mm 5) Production with anneal solution for stainless performance 6) Special ...