Enbridge SCC Management Program SCC Workshop Houston December
Enbridge SCC Management Program SCC Workshop Houston - December 2, 2003 Walter Kresic Enbridge Pipelines Inc.
System Map Pipeline System Line 9 Norman Wells Athabasca Line 1 Line 2 Line 3 Line 4 Line 5 Line 6 Line 7 Line 8 Line 9 Line 10 Line 11 Line 13 Line 14 Line 17 Vector 540 Miles 591 Miles 1098 Miles 800 Miles 1098 Miles 645 Miles 759 Miles 153 Miles 130 Miles 524 Miles 91 Miles 47 Miles 909 Miles 461 Miles 88 Miles 348 Miles
Initial susceptibility assessment No Potentially susceptible to SCC? Yes Condition Monitoring Estimate consequences, prioritize and implement field investigations No CEPA Framework Is SCC present? Periodic monitoring Yes Is significant SCC present? No Yes Estimate Consequences and prioritize for mitigation Plan & Implement Mitigation Select mitigation Schedule and implement mitigation Yes Is routine mitigation required? No Yes or No Document and learn Document & Learn
Condition Monitoring • Pipeline segment susceptibility inventory – – coating type / disbondment observations field examinations whenever pipe exposed crack ILI data hydrotest results when available
Plan and Implement Mitigation • Mitigation of discrete pipe joint – addresses isolated SCC colonies – grinding, sleeving, recoating • Mitigation of entire pipe segment – ILI-based repair project for widespread colonies – hydrotest is an option – pressure spectrum modification? (PRCI)
Document and Learn • Annual update of technical process – databasing significant volume of information – on-going trend process – share with industry
SCC Detected by ILI
Documented Process • Roles and responsibilities • Annual plans and budgets • Technical procedures – – – Field NDT Pressure restriction during field work Grinding / Sleeving / Coating Specifications Gathering samples and field observations Annual trending techniques
Enbridge SCC Observations • • • No failures have occurred Near neutral p. H SCC Associated with disbonded P. E. tape Pressure cycling a potential contributor Crack detection ILI is effective
Improvements • • • Field NDT process (i. e. reporting styles) NDT depth sizing Fitness-for-purpose equations Crack tool defect sizing precision Crack initiation and growth lifecycle understanding
Summary • Enbridge SCC Management Program is a component of a broader crack program applied to all pipe • Techniques and technologies exist but greater precision desirable
Enbridge SCC Management Program SCC Workshop Houston - December 2, 2003 Walter Kresic Enbridge Pipelines Inc.
- Slides: 12