Failure analysis of a sheared 2” steam injection pipe of a vacuum heater

Madan, M and Sujata, M and Raghavendra, K and Gore, P and Bhaumik, SK (2011) Failure analysis of a sheared 2” steam injection pipe of a vacuum heater. Project Report. National Aerospace Laboratories, Bangalore, India.

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Abstract

The steam injection pipe has failed by corrosion. The pipe was found to have got completely choked due to deposition and coke formation. Analysis suggests that there was failure elsewhere in the system which led to stoppage of steam flow through the pipe. The deposition in the localized region was promoted due to creation of a stagnant zone because of no steam flow. Subsequently, the rise in temperature due to poor heat transfer resulting from this deposition aggravated the situation further. Based on the severity of oxidation and scale formation on the outer surface of the pipe and microstructural changes observed in the steel, it is estimated that the pipe material was exposed to temperatures higher than 8000C for a prolonged time.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: Steam injection pipe;Failure;Chocking;Coking;Corrosion
Subjects: AERONAUTICS > Aeronautics (General)
CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Division/Department: Materials Science Division, Materials Science Division, Materials Science Division, Other, Materials Science Division
Depositing User: Ms. Alphones Mary
Date Deposited: 14 Jul 2011 16:37
Last Modified: 14 Jul 2011 16:37
URI: http://nal-ir.nal.res.in/id/eprint/9370

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