API 6A blind flange working pressure: 2000~20000psi nominal bore:1 13/ ... inchStandard: ANSI,JIS,DIN,BS4504,SABS1123,EN1092,UNI,GOST12820-80Types: plate, slip on, welding neck, blind, thread, socket weld ... flangeProcess: free forging, plate cutting, heat treat, machiningSurface Treat: Anti-rust Oil, Paint, ... ,F316,F316L,316Ti and etc API 6A blind flange