Experience with Stress Corrosion Cracking (SCC)
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KINDER MORGAN ENERGY PARTNERS, L.P. Experience with Experience with Stress Corrosion Cracking Stress Corrosion Cracking (SCC) (SCC) Scott Davis – Director of Pipeline Integrity and Facilities Engineering
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Experience with Stress Corrosion Cracking (SCC). Scott Davis – Director of Pipeline Integrity and Facilities Engineering. Outline. KMP Liquids Pipelines July 30, 2003 Failure Repair and Start-up Sequence SCC Investigation Strategy SCC Investigation Status and Results. - PowerPoint PPT Presentation
Transcript of Experience with Stress Corrosion Cracking (SCC)
KINDER MORGANENERGY PARTNERS, L.P.
Experience with Experience with Stress Corrosion Cracking (SCC)Stress Corrosion Cracking (SCC)
Scott Davis – Director of Pipeline Integrityand Facilities Engineering
KINDER MORGANENERGY PARTNERS, L.P.
OutlineOutline
KMP Liquids Pipelines
July 30, 2003 Failure
Repair and Start-up Sequence
SCC Investigation Strategy
SCC Investigation Status and Results
KINDER MORGANENERGY PARTNERS, L.P.
KMEP Liquids PipelinesKMEP Liquids Pipelines
KMCO
2
PACIFIC
PACIFIC
PACIFIC
CALNEV
Mid Con
PLANTATION
CFPL
Products Pipelines
Products Pipeline Terminals
Transmix Facilities
CO2 Pipelines
Terminals
KINDER MORGANENERGY PARTNERS, L.P.
8” Tucson to Phoenix 8” Tucson to Phoenix
Release
Location
KINDER MORGANENERGY PARTNERS, L.P.
July 30, 2003 FailureJuly 30, 2003 Failure
Approximately 13:09 line failure
SCADA alarm and Controller shutdown within 3 minutes
Operators dispatched and line isolated
Line excavated and exposed
KINDER MORGANENERGY PARTNERS, L.P.
Repair and Start-up Repair and Start-up SequenceSequence
Visual examination, suspected seam weld failure
Entire joint replaced by August 1, 2003
Line re-started at 50% of MOP (~34% SMYS)
KINDER MORGANENERGY PARTNERS, L.P.
Pressure Test ProtocolPressure Test Protocol
Metallurgist identified SCC on August 8, 2003
Line shut down for further testing
Pressure test in 2 sections– “Spike” test of 1 hour at 139% of MOP– 8 hours at 125% of MOP
Testing commenced on August 20, 2003
One test successful
KINDER MORGANENERGY PARTNERS, L.P.
Pressure Test FailurePressure Test Failure
2nd test unsuccessful– Failed in 1st minute at 139% MOP – 40’ from original failure– Intermittent SCC cluster length 6”
– SCC ranged from 50-86% wt
KINDER MORGANENERGY PARTNERS, L.P.
Return to OperationReturn to Operation
Bypassed 8” pipe near failure on August 24
Replaced 5400 feet of pipe in the immediate vicinity
Successful pressure test of section 2
Line restarted on September 12, 2003
Currently operating at 50% MOP
Increasing pressure dependant on results of SCC investigation
KINDER MORGANENERGY PARTNERS, L.P.
High pH SCCHigh pH SCC
Still requires – Environment that is conducive to SCC – Susceptible pipeline material– Tensile stress in the pipeline steel
Differences:– No surface corrosion products– CP is adequately protecting the steel– Higher published stress threshold
KINDER MORGANENERGY PARTNERS, L.P.
SCC InvestigationSCC InvestigationStrategyStrategy
1. Gather and investigate pipeline data
2. Develop algorithm to predict SCC likelihood
3. Complete case study on removed 5400’
4. Predict terrain conditions conducive to SCC
5. Conduct field geotechnical, CIS, and PCM
6. Select locations for excavations
7. Conduct field excavations
8. Reintegrate excavation findings
KINDER MORGANENERGY PARTNERS, L.P.
SCC InvestigationSCC InvestigationStatus and ResultsStatus and Results
MPI conducted on 5400’ of removed 8”
SCC found in pressure test failure joint
SCC found in 1 joint approx. 1800’ upstream
Field surveys have been completed
Finalizing excavation locations
Anticipated completion prior to year end
KINDER MORGANENERGY PARTNERS, L.P.
Contact InformationContact Information
Scott P. DavisDirector – Pipeline Integrity and Facility Engineering
Kinder Morgan Energy Partners1100 Town & Country DriveOrange, California 92868
E-mail: [email protected]
