Understanding Magnetic Flux Leakage (MFL) Signals From Mechanical Damage in Pipelines – Phase I

Clapham, L.; Babbar, V.; Rubinshteyn, A.; Hutanu, R.; Weyman, P.

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Understanding Magnetic Flux Leakage (MFL) Signals From Mechanical Damage in Pipelines – Phase I

2007-09-18
By Clapham, L. ; Babbar, V. ; Rubinshteyn, A. ; ...

[PDF-4.15 MB]

English

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Alternative Title:

Understanding Magnetic Flux Leakage (MFL) Signals From Mechanical Damage in Pipelines – Phase 1
Creators:

Clapham, L. ; Babbar, V. ; Rubinshteyn, A. ; Hutanu, R. ; Weyman, P.

Clapham, L. ; Babbar, V. ; Rubinshteyn, A. ; Hutanu, R. ; Weyman, P. Less -
Corporate Contributors:

United States. Dept. of Transportation. Pipeline and Hazardous Materials Safety Administration
Subject/TRT Terms:

[+]

Corrosion Finite Element Method Flaw Detection Leakage Magnetic Detectors Magnetic Flux Leakage Maintenance And Preservation Mechanical Failure Nondestructive Tests Pipelines Research Hub Signal Prediction Signal Processing Signals
Resource Type:

Tech Report
Geographical Coverage:

United States
TRIS Online Accession Number:

01646415
Edition:

Final Report
Corporate Publisher:

United States. Dept. of Transportation. Pipeline and Hazardous Materials Safety Administration
Abstract:

Pipeline inspection tools based on Magnetic Flux Leakage (MFL) principles represent the most cost-effective method for in-line detection and monitoring of pipeline corrosion defects. Mechanical damage also produces MFL signals, but as yet these signals are not sufficiently well characterized and understood to be used for reliable mechanical damage detection and characterization. The objective of this project is to accurately model MFL signals produced by mechanical damage in pipelines using finite element structural and magnetic modeling techniques. This report summarizes the findings of the first year (Phase 1) of what is anticipated to be a three year study. Previous work involved preliminary experimental work and modeling studies of circular plain dents in plate samples dented using a hydraulic press. In this current year the work was extended to include dents which are elongated in both the axial and circumferential direction, having a 2:1 aspect ratio.
Format:

PDF
Funding:

DTPH56-05-T-0001
Collection(s):

PHMSA Collection US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:713f8058f292fc99c6f59ec590b99fd6dacb12db7397e7f18f34238ea1accb02
Download URL:

https://rosap.ntl.bts.gov/view/dot/34448/dot_34448_DS1.pdf
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Understanding Magnetic Flux Leakage (MFL) Signals From Mechanical Damage in Pipelines – Phase I

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