Failure analysis of oxygen hose of the lance equipment in LD shop # 2

Madan, M and Venkataswamy, MA and Sujata, M and Banerjee, A and Biswas, A and Bhaumik, SK (2007) Failure analysis of oxygen hose of the lance equipment in LD shop # 2. Project Report. National Aerospace Laboratories, Bangalore, India.

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Abstract

The hose of the oxygen lancing equipment in LD shop # 2 has failed at the weld-bellows interface by reverse bending fatigue. The bending stresses were resulted due to inclined fitment of the hose at the fixed flange end. No metallurgical abnormalities or weld defects or mechanical damages were responsible for the fatigue crack initiation. It is recommended that if inclined fitment of the hose is not a process requirement, the original design be restored to realize the expected life of the component. On the other hand, if inclined fitment cannot be avoided, additional support may be provided for the hose at the fixed flange end to avoid reverse bending at the weld-bellows interface. A detailed analysis of the failure is presented in this report.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: Steel plant;Oxygen hose;Bellows;Fatigue;Reverse bending
Subjects: AERONAUTICS > Aeronautics (General)
CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Division/Department: Materials Science Division, Materials Science Division, Materials Science Division, Other, Other, Materials Science Division
Depositing User: Ms. Alphones Mary
Date Deposited: 25 Jul 2011 10:42
Last Modified: 25 Jul 2011 10:42
URI: http://nal-ir.nal.res.in/id/eprint/9553

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