Pipe Materials in Calgary Presentation Slide #21

As this closeup shows, the pipe is also protected against internal corrosion with a cementitious lining. It was 1973, with our corrosion problems just becoming apparent that Jim Bouck began lobbying - I won't say "threatening" - our pipe suppliers about giving us YDI. The problem was that the pipe used by the oil industry had no bells, it was all welded. A way to pull the coating over a bell of water pipe had never been developed at the factories in Western Canada.