Failure Analysis of Leaked Hydrogenation Reaction Heat Exchanger
Hydrogenation reaction heat exchanger in a petrochemical company leaked during service.In order to find the leakage causes,the failure analysis of the leaked heat exchanger was carried out by means of penetrant flaw detection analysis,chemical composition analysis,metallographic microstructure analysis,SEM micromorphology analysis and EDS micro-area chemical composition analysis.The results show that stress corrosion cracking of the 317L/316L composite stainless steel heat exchanger tube sheet prepared by surfacing occurs.The stress corrosion cracking of the heat exchanger is caused by the residual stress of surfacing and the corrosive medium in the environment.Some suggestions are given,for example,strictly control the surfacing process,take annealing treatment after surfacing to eliminate the residual stress,or select overall 317L stainless steel to prepare heat exchanger tube sheet.
万方数据
维普
