Carbon Steel
Carbon Steel
How could Demagnetize a carbon steel pipeline after electronic pig for welding process?
How could Demagnetize a carbon steel gas pipeline after electronic pig for welding process?
Your best bet would be to perform a forced depolarisation by using copper earthing rods, or bonding to any plant earthing at the extremities or valve stations along the pipe. It is critical that you consider the cathodic protection on the pipeline if it is a buried or submerged pipeline. This type of forced depolarisation will rapidly depolarise the pipe and thus ‘undo’ the cathodic protection. For this reason, it should not be left connected for a long time and any cathodic protection switched off or disconnected during the depolarisation process. Normal weld earthing should suffice to ‘demagnetize the pipe’ though. The question really needs more detail to provide a decent answer as there are many variables.
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Forcing a “Patina” On Carbon Steel – Part 1