51312-01215-Beyond Conventional External and Internal Tools for External Corrosion Direct Assessment - Unpiggabl

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Product Number: 51312-01215-SG

ISBN: 01215 2012 CP

Author: Joe Pikas

Publication Date: 2012

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Non Member Price: $20.00

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As a result of multiple incidents in the pipeline industry that occurred in the last 25 years and the need to address pipelines that could not be inspected i.e. upiggable using In-Line Inspection (ILI) or could not be taken out of service to be hydro tested due to high security concerns a team was formed of pipeline operators researchers and vendors to start putting together the first direct assessment process in early 1999. This team was formed for the purpose of coming up with an integrity process using proven monitoring technologies which consisted primarily of above ground (external) techniques which we all know as close interval survey (CIS) direct or alternating current voltage gradient (DC or ACVG) and current attenuation techniques which we all know as NACE SP0502 External Corrosion Direct Assessment. The key word is process using existing proven above ground i.e. external techniques and tools. More than a decade has gone by and newer technologies have been developed and proven; however NACE and PHMSA have been cautious in giving approval for newer techniques/tools for both internally and externally applications. This paper will discuss these new technologies and tools that have been developed in the last 10 years.