... steel: Q235B, A105,16Mn, 316L 20#; Stainless steel; Alloy steel ansi flange Flanges of welding neck, socket welding, threaded, blind, slip on ... be manufactured in different shapes and sizes 1. Standard:(forged flange)ANSI,JIS,DIN,BS4504,SABS1123,EN1092-1, UNI,AS2129,GOST- ... : A105,SS400,SF440 RST37.2,S235JRG2,P250GH,C22.85. Surface TreatmentAnti-rust Oil, Transparent/Yellow/Black Anti-rust Paint,Zinc ...