Failure analysis of an A333Gr6 pipeline after exposure to a hydrogen sulfide environment |
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Affiliation: | 1. State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;2. Shanghai Textile Energy Saving Environmental Protection Center, Shanghai 200082, China |
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Abstract: | The analysis of an A333Gr6 pipeline failure was conducted after exposure to high H2S partial pressure for several hours. Chemical composition, metallurgical structure, steel pipe hardness, and the welding joint near the broken position were studied. The chemical compositions of corrosion products inside the steel pipe were also analyzed. Results show that corrosion products consist of Fe3O4 and FeOOH without ferrous sulfide. Stress analysis was obtained through the finite element analysis method. The failure analysis and calculation results show that spontaneous ferrous sulfide combustion in a high H2S environment leads to high temperature and pressure in the pipe, resulting in pipeline breakage. |
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Keywords: | A333Gr6 pipeline steel Hydrogen sulfide Spontaneous combustion Failure analysis |
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