... Welding Flange, Alloy flange,Plate Flange astm a105 b16.5 carbon steel flanges ANSI Flange Size:1/2" ~ 64"(DN15 ... Ratings:JIS 5K, 10K, 16K and 20K ANSI Flange Materials: Carbon steel, Stainless steel and Alloy steel etc. Market: America, ... covers every process of the manufacturing-Raw material inspection, cutting, heating, gorging, heat treatment, machining, drilling, marking, washing, final inspection ...