... carbon steel flange 2) Standard: ASME, ANSI, API, JIS, JPI, BLIND FLANGES are used to blank off the ends of piping, valves ... opening. From the standpoint of internal pressure and bolt loading, blind flanges, particularly in the larger sizes, are the most highly stressed ... equipment may be necessary.3,Types: Flat Face Flanges, Slip On, Welding Neck, Blind, Threaded , etc.4,Water , Oil, Gas, Industrial ...