Method And Application Research On Nondestructive Testing For Pressure Parts

The operation of special equipment faces with the influence of high-temperature,high-pressure,explosive,inflammable,highly toxic and corrosive environment,which may easily cause serious damaging accidents,and it has been the problem to prevent the accidents form happening for the insiders all the time.This paper makes analysis on the failure mechanism of pressure parts of special equipment with nondestructive detecting technology,and comes up with prevention and life extension scheme,to ensure the safety and economic operation of special equipment,which is significant in engineering.Taking pressure parts,such as industrial boiler,pressure vessel,pressure piping,as research objects,the paper makes researches on the application of nondestructive detecting in pressure parts detecting with methods of theoretical analysis,case analysis and numerical simulation.First of all,failure mechanism characteristics of serious pressure parts are concluded and the most suitable detecting methods are selected,according to differing site conditions and serious performance of nondestructive detecting methods.Secondly,diagnostic analysis are applied to typical common accident cases of boiler,pressure vessel,pressure piping,and comparison between data processed in site and theoretical results,so as to find a breakthrough in predicting the failure accidents.Finally,we provide the theoretical basis for predicting the failure accidents by using nondestructive detecting,and monitor the failed pressure parts or those near expiry to prolong its service life,based on nondestructive detecting methods.Nondestructive detecting is the technology for detecting and preventing the failure accidents of pressure parts.The research results provide reference for the selecting of detecting methods of pressure parts and theoretical basis for preventing the failure accidents of pressure parts.