... petroleum, chemical, power, gas, metallurgy, shipbuilding, construction, etcperformed.specificationsWELDING NECK FLANGE 1.ANSI JIS DIN EN1092-1 BS4504 UNI 2 ... Forged Steel Flanges:(1).ASME/ANSI B16.5 : WELDING NECK FLANGE, SLIP-ON FLANGE, BLIND FLANGE,HIGH HUB BLIND ... FLANGE, SOCKET WELD FLANGE.LAPJOINT FLANGE, THREADED FLANGE. RING TYPE JOINT FLANGE.Pressure Class : 150, 300, 400 , 600 , 900 ...