Beginning in 2007 the I&I committee has developed an expansive set of modeling and full-scale testing projects dealing with mechanical damage, considering the severity of damage response to pressure and pressure cycling and its assessment, its detection and sizing, and its management. While much data and insight has been developed, the practicable outcomes are limited to tools to predict the burst pressure specific to collapse-controlled failure and fatigue response specific to plain dents. Simple practical acceptance guidelines have however not emerged. The subcontract sought...
Beginning in 2007 the I&I committee has developed an expansive set of modeling and full-scale testing projects dealing with mechanical damage, considering the severity of damage response to pressure and pressure cycling and its assessment, its detection and sizing, and its management. While much data and insight has been developed, the practicable outcomes are limited to tools to predict the burst pressure specific to collapse-controlled failure and fatigue response specific to plain dents. Simple practical acceptance guidelines have however not emerged. The subcontract sought completion of Task 1 of Project MD-4-13. Thus, information was gathered and reviewed concerning the body of knowledge developed by PRCI and others with a view to best define a plain dent such that: 1) simple management guidelines can be established; 2) such dents can be readily distinguished relative to other damage features; and 3) gaps in existing technology can be identified and bridged to enable developing management guidelines for other more complex dents. In complement to that, the subcontract’s scope sought comments concerning definitions of dent-related damage to pipelines, which is addressed in large part by this report.
Subsequent Tasks in this Project will benefit from these outcomes as they establish the technical foundation to define the response time frame when managing such features.