Analysis of failed tubes of Visbreaker heater BA41201
IR@NAL: CSIR-National Aerospace Laboratories, Bangalore
View Archive Info| Field | Value | |
| Title |
Analysis of failed tubes of Visbreaker heater BA41201
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| Creator |
Venkataswamy, MA
Sujata, M Bhaumik, SK |
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| Subject |
Aeronautics (General)
Chemistry and Materials (General) |
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| Description |
Two samples from failed Visbreaker tubes were sent to the laboratory along with a sample of unused tube for analysis. Examination suggests that the tubes have failed due to exposure to high temperature. Microstructural study indicated that the tube material was exposed to over 8000C for a prolonged period. This has resulted in localized oxidation of the tube steel with subsequent reduction in tube-wall thickness. When the thickness became critical, the tubes have either bulged or cracked under the hoop stress. EDX analysis showed that the tube material conforms to A335 (9Cr-1Mo) steel.
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| Publisher |
National Aerospace Laboratories
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| Date |
2004
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| Type |
Proj.Doc/Technical Report
NonPeerReviewed |
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| Identifier |
Venkataswamy, MA and Sujata, M and Bhaumik, SK (2004) Analysis of failed tubes of Visbreaker heater BA41201. Project Report. National Aerospace Laboratories, Bangalore.
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| Relation |
http://nal-ir.nal.res.in/9580/
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