Journal of Failure Analysis and Prevention

, Volume 9, Issue 3, pp 222–226 | Cite as

Failure Analysis of Stainless Steel Pipeline Used in Propulsion Engine Test Facility

Case History---Peer-Reviewed

Abstract

Austenitic stainless steel pipelines are used as a conduit for gaseous nitrogen to ejector flow lines of propulsion engine test facility. Leakage was noticed near a welded T-joint of such a pipeline system that was in service for years. Detailed metallurgical investigations were carried out to understand the cause of failure. Synergistic effect of chloride ions, thermal stresses from welding, and the presence of sensitized grains of the material led to stress-corrosion cracking of the steel. This paper highlights details of investigation.

Keywords

Stainless steel Sensitization 

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Copyright information

© ASM International 2009

Authors and Affiliations

  1. 1.Material Characterisation Division, Materials and Metallurgy Group, Materials and Mechanical EntityVikram Sarabhai Space Centre, Indian Space Research OrganizationTrivandrumIndia

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