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Low Field Magnetic Flux Leakage (LFM)

Pipeline integrity inspection data from low-field magnetic flux leakage (LFM) tool

Technology Type

lfm-icon

Detection Capabilities

Mill Anomalies
  • Hard Spots
Construction-Weld Anomalies
  • Cold Weld
Construction Anomalies
  • Gouges and Grinding
  • Re-rounded Dents
  • Wrinkles and Wrinkle Bends
Geological Force Anomalies
  • Bending Strain and Residual Stress
  • Ground Movement and Washout and Erosion
Interactive Pipeline Threats
  • Mechanical Damage
Crack Anomalies
  • Girth Weld Cracks

Low Field Magnetic Flux Leakage - known as LFM - Identifies changes in steel microstructure resulting from manufacture or milling. It also detects dent re-rounding, which can raise the severity of a dent and lead to cracking; hard spots, a localized hardening of the steel due to rapid cooling; and sensitivity to chemical and metallurgical properties of the steel itself.

LFM is also a key dataset in pipe joint classification (PJC), a methodology for grouping pipe joints with the same fingerprint for material documentation and discrepancy analysis as defined by the American Petroleum Institute’s API 1163.

Key Features

  • Introduces a controlled lower magnetic flux leakage field that is sensitive to steel microstructure variations and metallurgical characteristics
  • Facilitates the prioritization of higher risk dent anomalies

Sizes

  • 8-inch through 30-inch

Low Field Magnetic Flux Leakage - known as LFM - Identifies changes in steel microstructure resulting from manufacture or milling. It also detects dent re-rounding, which can raise the severity of a dent and lead to cracking; hard spots, a localized hardening of the steel due to rapid cooling; and sensitivity to chemical and metallurgical properties of the steel itself.

LFM is also a key dataset in pipe joint classification (PJC), a methodology for grouping pipe joints with the same fingerprint for material documentation and discrepancy analysis as defined by the American Petroleum Institute’s API 1163.

Technology Type

Detection Capabilities

Mill Anomalies
  • Hard Spots
Construction-Weld Anomalies
  • Cold Weld
Construction Anomalies
  • Gouges and Grinding
  • Re-rounded Dents
  • Wrinkles and Wrinkle Bends
Geological Force Anomalies
  • Bending Strain and Residual Stress
  • Ground Movement and Washout and Erosion
Interactive Pipeline Threats
  • Mechanical Damage
Crack Anomalies
  • Girth Weld Cracks

Key Features

  • Introduces a controlled lower magnetic flux leakage field that is sensitive to steel microstructure variations and metallurgical characteristics
  • Facilitates the prioritization of higher risk dent anomalies

Sizes

  • 8-inch through 30-inch