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Un-Piggable "Piggable" "Challenging" "Un-Piggable" Free Swimming Specialty Free External Non ILI--"Traditional Swimming Destructive Testing ILI" Tethered Tools (manual or automated) Crawler Tools Direct Assessment Robotic Tools (ECDA, ICDA, SCCDA) Internal Access External Access
In the final, post-assessment step, the data are analyzed to determine whether SCC mitigation is required, and if so, to prioritize those actions, define the interval for the next full integrity reassessment and evaluate the effectiveness of the SCCDA approach.
A significant issue with SCCDA is that it is not capable of reliably identifying the locations of the most severe SCC on a pipeline segment.
Each of the three integrity techniques (hydrostatic testing, SCCDA and ILI) has strengths and weaknesses.
Beavers: Field digs are a critical component of an SCCDA program.
SCCDA is widely thought of as a cheaper assessment method but that depends on the length of the segment and the quality and quantity of data readily available to the operator.
There is also an ICDA (internal corrosion direct assessment) and, for interstate transmission systems, an SCCDA (stress corrosion cracking direct assessment) process.
* Direct Assessment teams including ECDA, ICDA and SCCDA;
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