Examination and Adjustment of Piping Hangers before Commercial Operation in NPPs

This paper describes the basis,content and method of the cold and hot examination for the piping hangers during the plant commissioning,and explains the maintenance and regulation strategy of those abnormal hangers after inspection,and also expatiates the verification ways of piping hangers during hot condition before the plant is critical.Besides,this paper puts forward the notice items of piping hangers while installation,reconstruction and in-service inspection,and tries to make sure that the piping hangers are under normal working condition by the means of the inspection and regulation to the piping hangers,so that the system pipes can work safely and reliably.