Technical Reports

Tank Car Nondestructive Evaluation

  • 01
  • Mar
  • 1999
AUTHOR: Gregory A. Garvis
SUBJECT: Evaluation
KEYWORDS: Acoustic Emissions, Liquid Penetrant, Ultrasonics, Visual Testing, Nondestructive Evaluation
ABSTRACT: An evaluation of nondestructive evaluation (NDE) 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 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/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 transverse butt welds on a 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 rulemaking.