Pipe Materials in Calgary Presentation Slide #28

...and again had to smooth it with a 5-year moving average. Now the difference can be seen to be consistent over time. It is in very good agreement with an independent number from a completely different study. We measured corrosion rates on all kinds of our pipe by recovering samples and measuring maximum pit depths per metre. From the two studies, we can say PDI offered us about a 30% average reduction in corrosion rate, and in break rate.