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PRCI PR-150-116
- The Removal of Detrimental Magnetic Fields at Pipeline Tie-ins
- Report / Survey by Pipeline Research Council International, 03/01/1980
- Publisher: PRCI
$98.00$195.00
L51389e
Proctor Inspection Consultants, Inc.
Need: Pipelines frequently develop an induced magnetic field caused by any one of the following: pipeline inspection methods; induced electrical currents in the pipe; adjacent pipelines; terrestrial currents; and/or the interaction with geomagnetic fields. The induced magnetic field can become intense enough to interfere with pipeline repair procedures that involve arc welding.
Result: This report provides some background on the origins of magnetic fields in pipelines, and presents a technique for demagnetizing the area immediately surrounding any surfaces to be welded.
Benefit: A step-by-step procedure is given for reducing the residual magnetic field to a practical level low enough for welding purposes.
Proctor Inspection Consultants, Inc.
Need: Pipelines frequently develop an induced magnetic field caused by any one of the following: pipeline inspection methods; induced electrical currents in the pipe; adjacent pipelines; terrestrial currents; and/or the interaction with geomagnetic fields. The induced magnetic field can become intense enough to interfere with pipeline repair procedures that involve arc welding.
Result: This report provides some background on the origins of magnetic fields in pipelines, and presents a technique for demagnetizing the area immediately surrounding any surfaces to be welded.
Benefit: A step-by-step procedure is given for reducing the residual magnetic field to a practical level low enough for welding purposes.
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