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Title: Smart pig ‘fingerprint’ inspections can lead to fitness for purpose assessments and contractual disputes
Category: Pigsource Papers
Downloadable: Yes 
Project No.:
Research Agency:
Catalog No.: pg3378
Date of Publication: Feb 1 2003 12:00AM
Price: $25.00 US
Authors: Steve Mckenny, Roland Palmer-Jones, Phil Hopkins, Popi Nafis, and Gordon Wintle
Abstract: A recent ‘fingerprint’ smart pigging inspection recorded over 40,000 metal loss (corrosion) features in a 57km 42” diameter, dry gas pipeline supplying a major LNG facility in Indonesia. The pipeline had been in operation for less than 6 months. Assessment of these results by the inspection company identified 10 sections of pipe that required repair according to ASME B31.G, indicating that the pipeline was not ‘fit for purpose’. The pipeline operator immediately cut out these 10 sections to ensure the continued safe operation of the new pipeline.

This paper proposes a method for assessing baseline survey data that provides an acceptance level for pre-existing defects. This methodology will assist operators in assessing smart pigging data from new pipelines.

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