Failure analysis of tube hanger support of crude heater

Suresh Kumar, M and Madan, M and Venkataswamy, MA and Sujata, M and Bhaumik, SK (2006) Failure analysis of tube hanger support of crude heater. Project Report. National Aerospace Laboratories, Bangalore.

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Evidences suggest that the tube hanger support has failed by sulphide stress corrosion cracking (SCC). The SCC was promoted due to sensitization of hanger material. Microstructural study and hardness survey indicated that the sensitization was caused due to carburization of steel. It appears most probable that burning of large quantities of fuel gas was responsible for providing a conducive atmosphere for carburization in the furnace. It is recommended that either the furnace environment be modified or G 4868 alloy (30%Cr-30%Ni-2%Si steel) be used for the fabrication of tube hanger. A detailed analysis of the failure is presented in this report.

Item Type: Monograph (Project Report)
Uncontrolled Keywords: Tube hanger support; A 297 HK alloy; sensitization; carburization; sulphide corrosion cracking
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Depositing User: Raghavendra R chandu
Date Deposited: 20 Jul 2011 05:19
Last Modified: 20 Jul 2011 05:19

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