This paper analyzes the failure of the seamless steel pipe with material grade UNS N08811 used for the lower tail pipe after the operation and commissioning of a hydrogen production unit at the end of on-site installation,and finds out the cause and mechanism of the crack through a series of inspection and analysis methods such as macro inspection,chemical composition,mechanical properties,metallography,scanning electron microscope and energy spectrum,so as to prevent similar defects in the future.Corresponding targeted measures are proposed for important links of material production and key projects of material acceptance to prevent similar failures and provide effective guarantee for smooth operation of the device.
Cracks in the lower tail pipeTestingFailure analysis
NETL
NSTL
维普
万方数据
