Failure analysis and countermeasures for stainless steel pipeline leakage
During the hydrostatic test of pressure pipe installation supervision and inspection in a large petrochemical unit,a water spray leak was found on the body of a 304L pipe section,which caused a major safety hazard to the subsequent production and use of the unit.The Failure cause was analyzed through macro analysis,chemical compo-sition analysis,electron microscope scanning,energy spectrum analysis,metallographic analysis,pitting corrosion test analysis,mechanical property analysis and other inspection methods,The results indicate that the occurrence of perforation leakage in the pipeline section is due to the occurrence of chloride ion stress corrosion.After the rainwa-ter and sediment containing chloride ions come into contact with the pipeline wall,in a local high concentration chlo-ride ion environment,the pipeline body undergoes pitting corrosion and cracking,and over time,ultimately leading to the occurrence of corrosion perforation in the pipeline body.Suggested measures have been proposed to address the influencing factors of chloride ion stress corrosion in the pipeline section.
pressure pipelinesupervision and inspectionchloride ionstress corrosionfailure
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维普
