"misterroy" wrote in message
...
What could have caused the heating pipe to corrode so badly that it
failed? It was next to an external wall and lagged. The are a couple of
lengths of the pipe lying outside the building unused for the same 6
years, other than the threaded ends, they look new.
image https://drive.google.com/open?id=1o8...cqBdRGYatmQb6R

Most likely significant electrolysis due to a ****ed mains earth system and
bonding.