... pressure: 150lb, 300lb, 400lb, 600lb,900lb, 1500lb,2500lb type specificationitem: carbon steel slip on flangesize: 1/2' to 48'standard: ANSI B16 ... : petroleum, gas, chemical, metallurgy, electric station, shipbuilding, construction, etc.other types of flange: WN flange, blind flange, plate flange, socket weld ...