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Abstract:An evaluation of nondestructive testing (NDT) methods, authorized for use in replacing the current hydrostatic pressure test for qualification or re-qualification of railroad tank cars, has been performed by the Transportation Technology Center, Inc. (TTCI), a subsidiary of the Association of American Railroads (AAR). The project was accomplished through funding provided by the Federal Railroad Administration (FRA) and cooperative efforts from the tank car industry.
The accomplishments made with this government/industry effort include; 1) the base line evaluations of four railroad tank cars using Department of Transportation (DOT)/FRA approved NDE methods; 2) the development of a validation methodology to assess new and existing NDE technologies; 3) the performance of a base line probability of detection (POD) evaluation of the transverse butt weld on a DOT 111A tank car design; and 4) the initiation of a defect library containing tank cars and sections of tank cars containing service and artificially induced defects. The accomplishments identified provide the railroad tank car industry as well as government, academic and commercial organizations with the tools to address the economic and reliability issues introduced with the HM 201 rule making
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