Statistical Analysis Of U.S. Onshore Hazardous Liquid Pipeline Accidents From 2010 To Present Caused By Internal Corrosion And Possible Solutions

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Product Number: 51321-16910-SG

Author: Alvaro A. Rodriguez; Darren Lemmerman

Publication Date: 2021

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This paper provides a statistical analysis of onshore hazardous liquid pipeline accidents in the United
States from January 2010 to April 2020 by evaluating releases reported to be caused by internal
corrosion. The U.S. Department of Transportation’s Pipeline and Hazardous Materials Safety
Administration (PHMSA) Office of Pipeline Safety (OPS) Accident Investigation Division (AID) collected
and reviewed historical records from Form PHMSA F 7000-1 (Hazardous Liquid/CO2 Accident Report).
During the last ten years, PHMSA regulated pipeline companies (operators) have reported 503 internal
corrosion accidents, accounting for a total property damage of approximately $188,000,000 and nearly
53,000 barrels spilled. Nearly half of these internal corrosion failures were caused by microbiologically
influenced corrosion (MIC). About a third were associated with water drop-out/acid, the remainder of the
failures were caused by a variety of mechanisms such as erosion, pitting corrosion, galvanic action,
carbon dioxide, and buildup of sulfide products, among others.
In this paper, data will be presented and real accidents will be showcased to highlight the contributing
causes and underlying mechanisms of the internal corrosion damage of components that resulted in
significant releases of hazardous substances, creating a potential hazard for the public, workers, and the
environment. The objectives of this paper are to understand the causes of the failures and their
consequences, to identify the risk factors involved, and to report trends that may indicate the need for
additional preventative and mitigative actions. The over-riding goal is to provide some details in areas for
potential improvement in pipeline operations to reduce risk from internal corrosion and improve integrity
management goals.