... .Grade:200,300series 4.Surface:bright 5.Standard:AISI,AST stainless steel flanges 1.GRADE:ASTM A182-301,F302,F304/L,F316/L ... FLANGESStyle of flange sealing face: (RF), (FF), (MFM), (LG), (RG). stainless steel flangeGB/T9112-9124,HG20592-20635,SH3406ANSIB16.5JISB2220UN1092AS2129BS4504DIN 2527-2673Non-standard ...