... construction, etcperformed.specificationsWELDING NECK FLANGE 1.ANSI JIS DIN EN1092- ... 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, 1500 , 2500 welding neck flange ...