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

Details

• 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.
• Corporate Contributors:
  United States. Dept. of Transportation. Pipeline and Hazardous Materials Safety Administration
• Subject/TRT Terms:
  • Pipelines
  • Corrosion
  • Mechanical failure
  • Leakage
  • Flaw detection
  • Signal processing
  • Finite element method
  • Magnetic detectors
  • Nondestructive tests
  • Signals
  More +
• 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
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/34448/dot_34448_DS1.pdf
• File Type:
  [PDF - 4.15 MB]
• Collection(s):
  PHMSA Collection ; US Transportation Collection
• Main Document Checksum:
  urn:sha256:713f8058f292fc99c6f59ec590b99fd6dacb12db7397e7f18f34238ea1accb02