Pipeline Inspection & Magnetism

What do you mean?

Is the magnetic particle within the base steel, or is it like a small magnet attached to the outside?

If attached to the outside, it would depend on the inspection technique, and relative size of object.

What did you do? Shoot a pipeline instead of a deer?

Internal inspection tools look for internal anomalies and conditions

For an external anomaly you need an external inspection

Not sure what you are looking for

In service pipe or out of service?

Smart pig will pick up that hot tap you are thinking about putting on that line.

I think this counts for "If you see something say something".

The inspection is typically done with ultrasonics (smart pig) which will not detect the BBs on the OD surface. If the ID tags were continuous or integral to the surface (welded or clad) the machine would detect it and you could print the tag with the typical shaded/gradient chart. They would have to be attached in some manner that sound would clearly pass through the surface.

If it is a flaw detection technique such as GUL or UTSW or MFL, it detects disruptions in the waveform as the sound or magnetic wave passes through the steel. Magnets would disrupt it, but I'm not sure it would be identifiable and unique like you seem to want.

I'm not as familiar with Pipeline inspection (more process piping in a facility) but my impression is they use Smart Pig most often, and GUL as another alternative. Both of these allows a high confidence inspection over long piping runs.

Could you bond your marker to the pipe at the same time you coat the weld site?

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Location: Sugar Land

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I work for a pipeline company based out of Sugar Land, I hope you don't work for us
Answer is yes

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You're inspecting a pipeline and coming here for instructions? Jesus, I hope this line is far away from BR and carrying something harmless.

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probably out on Elliot Rd.

Yah, x-ray crew would shoot and fail the weld due to mag particles.