... pressure: 150lb, 300lb, 400lb, 600lb,900lb, 1500lb,2500lb type specificationitem: carbon steel slip on flangesize: 1/2' to 48'standard: ANSI B16 ... , construction, etc.other types of flange: WN flange, blind flange, plate flange, socket weld flange, threaded flange, ring joint flange, etc ...