In order to explore the fracture failure causes of crude oil heating pipes,the macroscopic morphology of corrosion on the inside wall of the pipe was observed,the medium in crude oil and the inside wall of the pipe were detected,and the geometry of the corrosion pit was measured.Chemical composition analysis,tissue morphology observation,mechanical properties test analysis and energy spectrum analysis were carried out at different positions of the failed pipe section.The results showed that the physical and chemical properties of the pipe met the standard requirements.The presence of sulfate-reducing bacteria(SRB)in crude oil was the main reason for the corrosion of the pipes,while the presence of Cl-in water accelerated the corrosion of the pipes.It is suggested that pipe cleaning should be carried out regularly to strictly control the water content in the pipe,and corrosion risk analysis should be carried out in the station to strengthen monitoring of the parts of the pipe body prone to corrosion.
维普
万方数据