... Socket Welding Flange, Alloy flange,Plate Flange large size of stainless steel flange ANSI Flange Size:1/2" ~ 64"( ... 10K, 16K and 20K ANSI Flange Materials: Carbon steel, Stainless steel and Alloy steel etc. Market: America, Europe, Korea, South East ... the whole quality control system which covers every process of the manufacturing-Raw material inspection, cutting, heating, gorging, heat treatment, ...