Asme B16.47 Threaded Flange 5Inch Cs Astm A105n Sch Std/ Vented Blind 300 Lb
The ASTM A182 F51 flanges with hub shall be manufactured by a hot forging process, in which the material shall be forged as close as practicable to the specified shape and size.
The F51 duplex flanges without hub shall be manufactured from plate in according to ASTM A240. After hot forging, the duplex F51 flanges shall be cooled to a temperature below 1000¡ãF [538¡ãC] prior to heat treatment. Then the flange shall be solution annealed and quenched. It shall be heated to a temperature higher than 1870¡ãF [1020¡ãC], holding for a period of time, and quenched in cold water or oil rapidly to a temperature below 500¡ãF [260¡ãC].