13:30 Jul-21-2009 Underground Line Integrity Checking
This is regarding underground line integrity checking.I have already posted once through this forum.I got some positive replies.But we are exploring something more.
We have two underground line which is nearly 3.5m below the ground level.Distance between this line is almost 2m.The line is 48" dia having external wrapping coating.This lines are protected by ICCP system.It run almost 4 to 5 km underground.
We are exploring some technique by which integrity of line is assured without excavation,without pigging.
Is there is any proven technique available that can tell that external wrapping coating of this line is in good condition as we are not expecting any internal corrosion in these lines.
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