A question has been submitted to AS2885.info which is outside the experience of the team, so we thought we see if someone else out there is able to help:

A transmission pipeline was previously wire-brush pigged on a few occasions in the last 30 years. However the current operator has recently realised that the line has FBE internal lining.

The question:  Is there any value in using a nylon brush pig for future pig runs? Or is the lining likely to be already so damaged that further wire brushing doesn’t matter?