1. How Old is Too Old? A Look at Aging Transmission Pipeline Infrastructure Issues

2. Aging Infrastructure – How big of a deal is it?

3. How old are Natural Gas Transmission Pipelines? Average mile is about 50 years old.

4. What PHMSA Data Tells Us about Incident Rates for Gas Transmission Pipelines

5. The Bathtub Curve Reliability specialists often describe the lifetime of a population of products using a graphical representation called the bathtub curve.

6. So while the Bathtub Curve may be the norm from a theoretical reliability engineering standpoint – Does it have to be that way if companies are really committed to zero incidents?

7. How old are Natural Gas Distribution Pipelines? Average mile is about 40 years old.

8. What PHMSA Data Tells Us about Incident Rates for Gas Distribution Pipelines

9. How old are Hazardous Liquid Pipelines? Average mile is 40-45 years old

10. What PHMSA Data Tells Us about Incident Rates for Hazardous Liquid Pipelines

11. Causes of all Hazardous Liquid Incidents 2010-2015 86.7% of failures within an operator’s control

12. Causes of all Hazardous Liquid Incidents 2010- 2015 on pipeline installed before 1950

13. Causes of all Hazardous Liquid Incidents 2010-2015 on pipeline installed after 2009

14. What do the regulations say about aging pipelines The federal regulations on gas pipelines do not mention the word “age”. The regulations for hazardous liquid pipelines do take age into consideration for determining the prioritization of assessments, but there are no real requirements that relate to age. Appendix C to Part 195—Guidance for Implementation of an Integrity Management Program

15. The Big Question Without clear regulatory criteria for replacement are we facing a growing incident rate as thousands of miles of pipelines built before 1970 gets older?

16. Thanks! Carl Weimer 360-543-5686 carl@pstrust.org http://www.pstrust.org