Recent pipeline accidents in the United States have highlighted concerns with older vintage natural gas and hazardous liquid pipelines. The United States Department of Transportation (USDOT) Pipeline and Hazardous Materials Safety Administration (PHMSA) is performing a comprehensive review to determine the fitness for service of vintage pipelines, and if the risks associated with vintage pipelines can be better managed by changes to US pipeline safety standards and regulations. Concerns with vintage pipelines include weld seam manufacturing issues, such as low frequency electric resistance welding (LF-ERW) and submerged arc welding (SAW), cast iron pipe, plastic pipe and certain coatings. This paper presents findings from vintage pipeline failure investigations, recent PHMSA actions, and some approaches to address key vintage pipe concerns. These approaches include knowledge assurance (adequacy and quality of historical data), methods to systematically obtain missing data, and processes and criteria for determining fitness-for-service, including assessment, remediation, and replacement programs.

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