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51312-01318-In-Line Inspection EMAT Utilizing an Oblique Field

Picture for In-Line Inspection EMAT Utilizing an Oblique Field
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Product Number: 51312-01318-SG
ISBN: 01318 2012 CP
Author: James Simek
Publication Date: 2012
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In-line inspection tools have continued to mature with additional techniques and methods being evaluated for both laboratory conditions and in-line service. In order to achieve adequate detection and quantification for a broad range of features that may represent an integrity threat to operating pipelines several technologies with variants of each have been placed into service. More recently tools employing Electromagnetic acoustic transducers (EMAT) have been introduced for use in measuring wall thickness and for crack detection applications. This paper will discuss the development of an EMAT system using an oblique field arrangement to enhance the system performance by exploiting the increased magnetostrictive effect due to the oblique bias field. Laboratory tests are conducted in samples prepared specifically for EMATS development in addition to samples used in pull tests for a (Magnetic Flux Leakage) MFL development program incorporating both planar or crack like and volumetric features. Response of the EMATS system to a broad category of feature classes is discussed providing insight into the data and results obtained from the modular prototype system highlighting aspects of an EMATS system response to all of the feature types one might expect to encounter in a typical pipeline survey.
In-line inspection tools have continued to mature with additional techniques and methods being evaluated for both laboratory conditions and in-line service. In order to achieve adequate detection and quantification for a broad range of features that may represent an integrity threat to operating pipelines several technologies with variants of each have been placed into service. More recently tools employing Electromagnetic acoustic transducers (EMAT) have been introduced for use in measuring wall thickness and for crack detection applications. This paper will discuss the development of an EMAT system using an oblique field arrangement to enhance the system performance by exploiting the increased magnetostrictive effect due to the oblique bias field. Laboratory tests are conducted in samples prepared specifically for EMATS development in addition to samples used in pull tests for a (Magnetic Flux Leakage) MFL development program incorporating both planar or crack like and volumetric features. Response of the EMATS system to a broad category of feature classes is discussed providing insight into the data and results obtained from the modular prototype system highlighting aspects of an EMATS system response to all of the feature types one might expect to encounter in a typical pipeline survey.
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Picture for Statistical tolerance intervals: A better approach to in-line inspection performance assessment
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51312-01312-Statistical tolerance intervals: A better approach to in-line inspection performance assessment

Product Number: 51312-01312-SG
ISBN: 01312 2012 CP
Author: Jed Ludlow
Publication Date: 2012
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Picture for Small-Scale Technology for Pipeline Monitoring and Inspection
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51312-01313-Small-Scale Technology for Pipeline Monitoring and Inspection

Product Number: 51312-01313-SG
ISBN: 01313 2012 CP
Author: Michael Volk
Publication Date: 2012
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Picture for 07132 In-Line Inspection Performance Verification
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07132 In-Line Inspection Performance Verification

Product Number: 51300-07132-SG
ISBN: 07132 2007 CP
Author: Richard McNealy, Roger McCann, and Ming Gao
Publication Date: 2007
$20.00

Analytical methods for verification of assumed performance metrics, in terms of sizing are presented in this paper. The application of methods and criteria described in API 1163 for rejection and acceptance of assumed tool tolerance are discussed.
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