Tom Seeber: John Grapiglia - AOG · Presentation Overview Slide 2 1. The Crossway JIP – Tom...
Transcript of Tom Seeber: John Grapiglia - AOG · Presentation Overview Slide 2 1. The Crossway JIP – Tom...
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Tom Seeber:
John Grapiglia:
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Presentation Overview
Slide 2
1. The Crossway JIP – Tom Seeber
1. The need for a guideline
2. Launching the JIP
3. Process
4. Outcomes
2. CP Research Program – John Grapiglia
1. Typical CP Systems
2. Uncertainties regarding CP interaction
3. Objectives
4. Progress
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Pipeline Shoreline Crossings
Slide 3
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Pipeline Shoreline Crossings
Slide 4
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Pipeline Shoreline Crossings
Slide 5
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The Crossway JIP
Slide 6
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The Process
Slide 7
1. Desktop Study:
a) Australian and international standards and codes
b) International publications, journals and conferences
c) Operating company information
d) Atteris in-house engineering database and expert knowledge.
2. Research Report:
a) Lessons Learned
b) Collaboration for Approvals
c) Code Breaks
d) CP Systems
e) IMMR and Decommissioning
3. Development of the Engineering Guideline.
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Shoreline and Waterway Crossing Guideline
Slide 8
• Design Interface Management
• Environmental Preservation
• Pipeline Route Selection
• Crossing Design Concept Development
• Engineering Design Data
• Application Limits of Pipeline Standards
• Pipeline System Integrity Design
• Inspection, Monitoring, Maintenance and
Repair
• Decommissioning
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Pipeline System Integrity Design
Slide 9
System Design
Foundation Design
Mechanical Design
External Coating System
Cathodic Protection System Design
Casings
Stability Design
Seismic Loading
Human Interference
Construction and Pre-commissioning Considerations
Commissioning and Operational Considerations
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Corrosion Protection Design: Offshore
Slide 10
e-
Aluminium
Bracelet
Anode
Coating
Defect
e-
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Corrosion Protection Design: Onshore
Slide 11
e-
-ve +ve
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Shore Crossing CP Design
Slide 12
What do the Pipeline codes say?
AS2885.4 DNV OS F101
DNV OS F101 Appendix F
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Shore Crossing CP Design
Slide 13
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Shore Crossing CP Design
Slide 14
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Shore Crossing CP Design
Slide 15
e-
Subsea
Galvanic CP
Short Onshore
Pipeline
Onshore pipeline protected by offshore system.
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Cathodic Protection Interaction
Slide 16
e-
Offshore anodes draw down the impressed current system.
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Cathodic Protection Interaction
Slide 17
Passivated offshore anodes no longer active.
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Research Team
Slide 18
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Research Objectives
Slide 19
1. How much protection can the offshore galvanic system provide for
the onshore pipeline?
2. Will offshore anodes passivate under excess current? Will they
reactivate?
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Proposed Research
Slide 20
This custom rig will measure the ‘throw’ of a galvanic system.
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Test Rig Design
Slide 21
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Proposed Research
Slide 22
Linear Polarisation Resistance tests of standard and high-performance
offshore anodes will demonstrate whether they passivate.
Benchtop testing will be continued to
determine whether the anodes will
Reactivate.
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Acknowledgments
Slide 23
This work was funded by the Energy Pipelines CRC, supported through
the Australian Governments Cooperative Research Centres Program.
The cash and in-kind support from the APGA RSC is gratefully
acknowledged.
We also acknowledge the contribution of the other JIP members and
the Lead Industry Advisors for their technical input.