Magnetic Pipeline Screening

Published: June 10, 2017 | Last updated: July 5, 2023

What Does Magnetic Pipeline Screening Mean?

Magnetic pipeline screening is a method of testing for the presence of corrosion or other anomalies in a metal pipe. This screening method enables the precise location of a potential pipe failure. Magnetic pipe screening is used to identify and action repairs to underground piping without digging a continuous trench to expose the pipe.


Trenchlesspedia Explains Magnetic Pipeline Screening

Magnetic pipe screening falls under the broad category of non-destructive testing. Piping is tested while still in service and without causing damage through applying stress to the pipe. Equipment referred to as a PIG (Pipeline Inspection Gauge) is inserted into the pipe and travels along its length. The PIG generates a magnetic field in the pipe and sensors pick up any deviation in this field caused by corrosion or anomalies in the pipe. The defects are noted in terms of size, position on the side wall and distance from the entry point of the PIG. This information is invaluable when initiating the trenchless rehabilitation process.


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