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Failure analysis and improvement measures of hydrogenation reactor flange sealing groove
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Chunyi ZHANG1, 2, Ge ZHU3, Zhiyong TIAN1, 3, Ming SONG1, **, Liang DU1, 3, Yuanjian WU1, 3
China Safety Science Journal | 2024, 34(12) : 100 - 107
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China Safety Science Journal | 2024, 34(12): 100-107
• Safety engineering technology •
Failure analysis and improvement measures of hydrogenation reactor flange sealing groove
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Chunyi ZHANG1, 2, Ge ZHU3, Zhiyong TIAN1, 3, Ming SONG1, **, Liang DU1, 3, Yuanjian WU1, 3
Affiliations
  • 1 China Special Equipment Inspection and Research Institute，Beijing 100029，China
  • 2 Oil and Gas Pipeline and Storage Equipment Safety for State Market Regulation，Technology Innovation Center，Beijing 100029，China
  • 3 Zhenhai Refining & Chemical Company，SINOPEC，Ningbo Zhejiang 315207，China
Published: 2024-12-28 doi: 10.16265/j.cnki.issn1003-3033.2024.12.0102
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In order to prevent accidents caused by the failure of the flange sealing groove in the hydrogenation reactor，failure analysis methods such as macroscopic inspection，fracture analysis，ferrite detection，chemical composition analysis，hardness detection，metallographic detection，SEM analysis and operation process analysis were adopted. The influencing factors of damage mode，start-stop operation process，ferrite content in the weld overlay layer，material properties，and abnormal elements were studied，and the reasons for the failure of the flange sealing groove at the outlet of the hydrogenation reactor were analyzed. The results indicate that the failure of the sealing groove is mainly due to the high stress between the weld overlay layer and base metal of the sealing groove，which produces stress corrosion cracking under the action of a corrosive medium containing F，S and other elements. There is no weld overlay layer on the bottom surface of the cracked flange sealing groove，and the transgranular cracks started at the junction of the surface weld overlay layer and the non-weld overlay layer，mainly on the surface of the non-weld overlay layer side. According to the failure causes，the corresponding improvement measures are put forward from the aspects of manufacturing，material selection and maintenance.

hydrogenation reactor  /  flange sealing groove  /  failure causes  /  scanning electron microscope(SEM)  /  weld overlay layer  /  stress corrosion cracking
Chunyi ZHANG, Ge ZHU, Zhiyong TIAN, Ming SONG, Liang DU, Yuanjian WU. Failure analysis and improvement measures of hydrogenation reactor flange sealing groove[J]. China Safety Science Journal, 2024 , 34 (12) : 100 -107 . DOI: 10.16265/j.cnki.issn1003-3033.2024.12.0102
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Year 2024 volume 34 Issue 12
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Article Info
doi: 10.16265/j.cnki.issn1003-3033.2024.12.0102
  • Receive Date：2024-07-25
  • Online Date：2025-07-09
  • Published：2024-12-28
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  • Received：2024-07-25
  • Revised：2024-09-28
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Affiliations
    1 China Special Equipment Inspection and Research Institute，Beijing 100029，China
    2 Oil and Gas Pipeline and Storage Equipment Safety for State Market Regulation，Technology Innovation Center，Beijing 100029，China
    3 Zhenhai Refining & Chemical Company，SINOPEC，Ningbo Zhejiang 315207，China
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https://castjournals.cast.org.cn/joweb/zgaqkxxb/EN/10.16265/j.cnki.issn1003-3033.2024.12.0102
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表12种不同金属材料的力学参数
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小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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