The phenomena of violent vibration and high noise occurred on desuperheating water pipeline to the drain flash tank of 2×600MW units in second-phase project of Huaneng Luohuang Power Generation Co Ltd have been analysed

it is believed from test and analysis that the main cause resulting in violent vibration and high noise on desuperheating water pipeline is the larger aperture of desuperheating water spraying pipe.Through retrofitting the number and apecture of spray-holes on the desuperheating water spraying pipe

the problem of violent vibration and high noise occurred on the desuperheating water pipeline has been successfully eliminated.