在役氢氟酸管道伪裂纹原因分析
Analysis of Pseudo-crack in In-service Hydrofluoric Acid Pipeline
姚凤娟1
作者信息
- 1. 江苏金桐表面活性剂有限公司,江苏 南京 210048
- 折叠
摘要
针对烷基苯装置涉氢氟酸压力管道焊缝X射线影像呈裂纹状缺陷问题进行分析研究.采用宏观分析、电镜扫描分析、微观组织分析、腐蚀机理分析等手段,判定该裂纹不是焊缝本体裂纹,而是腐蚀产物龟裂造成的"伪裂纹".焊缝区虽有腐蚀减薄,但并未失效,不影响压力管线继续使用.
Abstract
Analyze and study the problem of crack like defects in X-ray images of welds in pressure pipelines involving hydrofluoric acid in alkylbenzene units.By using macroscopic analysis,electron microscopy scanning analysis,microstructure analysis,corrosion mechanism analysis and other methods,it is determined that the crack is not a crack in the weld body,but a"pseudo crack"caused by corrosion product cracking.Although there is corrosion and thinning in the weld area,it has not failed and does not affect the continued use of the pressure pipeline.
关键词
氢氟酸/裂纹/腐蚀/氟化物Key words
hydrofluoric acid/cracks/corrosion/fluoride引用本文复制引用
出版年
2024
NETL
NSTL
万方数据