The letter transmits the Final Report for work completed under US DOT PHMSA Other Transaction Agreement (OTA) DTPH56-08-T-000011, Structural Significance of Mechanical Damage. The project was implemented to develop a detailed experimental database on how pipelines respond when affected by mechanical damage, caused by both external interference and rock dents. This full-scale testing program produced detailed experimental data to support the validation of improved burst and fatigue strength models to assess dents interacting with secondary features - gouges, corrosion, and welds. These data are needed to support the efforts of PHMSA and the pipeline industry to ensure safe operation of pipeline systems and to promote continuous improvements and focus on public safety.
In-field repair of a damaged pipeline must be performed safely, efficiently, rapidly and reliably. Reinforcement of damaged pipelines is typically acc...
To minimize excavations and public inconvenience, utilities often use horizontal directional drilling (HDD) to create underground pathways for the ins...
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