(188b) Reduced Toughness Fittings and Potential Effect on Low-Temperature Fitness for Service

Authors: 
Subramanian, K., Stress Engineering
King, R., Stress Engineering Services, Inc.
Ayewah, D., Stress Engineering Services
It has been reported in industry that recently manufactured piping and pressure vessel components may have reduced toughness where the component fails the Code -20F impact exemption. This presentation will review the industry reported findings and outline a potential analysis path forward to address fitness for service (FFS) concerns for potentially at-risk components that are currently in service. Representative analysis results for various configurations will be presented along with highlighting the need for further industry work to develop a methodology to identify the systems with the highest risk for brittle fracture if these reduced toughness components are within the system.
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