Carbon Steel API Adapter Flange 1.Size:1/2" to 64" 2.Pressure:Class150 to 1500,PN6 to PN64 3.Carbon steel,Stainless steel Carbon Steel API Adapter Flange1), Name:Flange2), Sizes: 1/2"- 64",15mm - 1600mm3), Material: Carbon steel, Stainless steel and Alloy steel etc.4), Standard: ANSI, DIN, GOST, BS, JIS and customers' drawings for special use5), Types: WN, SO, BL, Plate, Thread, Socket and etc6), ...