... :A105,SS400,RST37.2, S235 3.ANSI,JIS,DIN,GOST 12820-80,SABS1123,EN1092-1,UNI. Carbon Steel Flange,high quality carbon ... ,SS400,RST37.2, S2353.flange standards:ANSI,JIS,DIN,GOST 12820-80,SABS1123,EN1092-1,UNI.1. Standard:(forged flange)ANSI,JIS ...