... steel standard:EN,UNI,JIS,DIN,ANSI Carbon Steel A 105 ANSI Blind Flange:Specifications: ... rust oil,hot galvanizingSize: 1/2''-72''Material: Carbon steel/stainless steelStandard: DIN,ANSI,UNI,JIS,ASTM, ... kinds of flanges,eg.stainless steel flat flange,carbon steel blind flange,ss welding neck flange,and ... welcome your valuable inquiry and questions. Carbon Steel A105 ANSI Blind Flange with good quality