Failure Analysis of Stainless Steel Pipeline Used in Propulsion Engine Test Facility
- 134 Downloads
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.
KeywordsStainless steel Sensitization
- 1.Fellows, J.A.: Fractography. In: Metals Handbook, vol. 9, 8th edn., p. 77. American Society for Metals, Metals Park, OH (1974)Google Scholar
- 4.Narayan, P.R., Jha, A.K., Arumugham, S., Lakshnmanan, T.S.: Failure investigation of cracks in austenetic stainless steel propellant storage tank. Pract. Metallogr. 34(5), 250 (1997)Google Scholar