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Title: Inspection of non-piggable pipelines
Category: Pigsource Papers
Downloadable: Yes 
Project No.:
Research Agency:
Catalog No.: pg3221e
Date of Publication: 1995
Price: $25.00 US
Authors: Jan A de Raad
Abstract: In order to establish the integrity of subsea and buried (off-) loading lines from the inside, which can not be inspected with self-contained pigs, a field-proven cable-operated tool has been developed by RTD. This paper describes the ultrasonic pipeline inspection tool (PIT) which has a range of up to 17km. A long track record proves the success of this method.

In this paper, the different techniques and their merits will be explained. Also, a unique semi-automatic manual ultrasonic system, which nevertheless provides coherent colour-enhanced thickness mapping, will be introduced.

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