|About this Abstract
||Materials Science & Technology 2019
||Failure Analysis: Industry Specific Failures
||A Tale of Two Studies: Remaining Useful Life in Seam-welded P-11 High Energy Steam Piping after 39 Years of Service
||Rachel Wittman, John Hasier
|On-Site Speaker (Planned)
Longitudinal seam welded high energy piping can create massive damage upon sudden failure. Remaining useful life estimates are a useful tool in assessing high-risk components in any system to prevent unwanted failures. This case study examines the remaining useful life of spools of 20” and 24” diameter longitudinal seam-welded ASTM A 155, Class 1 Grade P-11 high energy steam piping after 14 and 39 years in service. This life assessment utilizes full cross weld section accelerated creep stress rupture testing, measurements of inclusion density, microhardness profiling, and cross weld metallography to arrive at a high confidence remaining useful life prediction. Results from the 14th service year (1993) and the 39th service year (2018) are compared, and the challenges of designing experiments to replicate and enhance work conducted decades in the past are explored.