A Case Study How Reduced Uncertainties of Latest Generation of Ultrasonic Crack Detection ILI Technology Benefit Engineering Criticality Assessments

Proceedings Publication Date:

15 Apr 2019
Presenter
Stephan Tappert
Presenter
Company
Author
Stephan Tappert, Mathieu Suss, Iryna Lachtchouk, Jane Dawson, Dr. Thomas Hoffmann, Martin Tschuch
Part of the proceedings of
Abstract

To provide a more insightful and accurate feature description from Crack ILI reporting as per the Fitness For Service analysis in API 1176, individual crack dimensions must be established to a given accuracy. Baker Hughes, a GE company has established an absolute depth sizing specification, which already represented a significant shift from a traditional conservative depth reporting format in “bands” to a more accurate depth sizing. [1]

This paper describes how the latest generation of inline inspection Crack Detection (CD) tool further reduces uncertainties in the engineering criticality assessment due to its increased accuracy. The development of a high resolution CD tool and its benefits of supporting a more accurate integrity assessment are covered. The paper provides a case study in which the inspection results demonstrate the added value of the latest generation tool versus standard accuracy inspection. High scanning rates provide enhanced information of the presence of defects as small as 15mm in length. With qualitatively improved data, it is possible for the operator to allocate effort and financial resources more efficiently. 

 

[1] IPC2016-64224 THE DEVELOPMENT AND USE OF AN ABSOLUTE DEPTH SIZE SPECIFICATION IN ILI-BASED CRACK INTEGRITY MANAGEMENT OF PIPELINES

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