Recommended Non-Destructive Testing to Improve Nurse Tank Safety, Phases I and II

The goal of this project was to develop recommendations for non-destructive testing of nurse tanks, supported by sufficient justification and cost-benefit information, to enable the Pipeline and Hazardous Materials Safety Administration (PHMSA) to undertake a related rulemaking recommended by National Transportation Safety Board (NTSB).

  • Record URL:
  • Supplemental Notes:
    • Any nurse tank testing procedure is likely to impose additional costs on agricultural operations that use nurse tanks to inject nitrogen fertilizer in the form of pressurized anhydrous ammonia into the soil of their fields. Tank failure reports indicate the greatest challenges to maintaining tank integrity are stress corrosion cracking (SCC), defective welds, and tank damage incurred during service. An unknown number of tanks manufactured in the 1950s through the 1970s still in use today were manufactured with higher strength steel, which is more prone to SCC. Beginning in 1999 with the new American Society of Mechanical Engineers standards, nurse tanks are now manufactured with thinner steel, and the welds are not annealed to relieve the very high residual stresses in the welded joints where SCCs could initiate and then propagate.

Language

  • English

Project

  • Status: Completed
  • Funding: $892000
  • Sponsor Organizations:

    Federal Motor Carrier Safety Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Managing Organizations:

    Federal Motor Carrier Safety Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Project Managers:

    Goettee, David

  • Performing Organizations:

    Virginia Tech Transportation Institute

    3500 Transportation Research Plaza
    Blacksburg, Virginia  United States  24061
  • Start Date: 20120000
  • Expected Completion Date: 20130800
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01627866
  • Record Type: Research project
  • Source Agency: Federal Motor Carrier Safety Administration
  • Files: RiP, USDOT
  • Created Date: Feb 28 2017 10:18AM