Tom Seeber:

John Grapiglia:

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

Pipeline Shoreline Crossings

Slide 3

Pipeline Shoreline Crossings

Slide 4

Pipeline Shoreline Crossings

Slide 5

The Crossway JIP

Slide 6

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.

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

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

Corrosion Protection Design: Offshore

Slide 10

e-

Aluminium

Bracelet

Anode

Coating

Defect

e-

Corrosion Protection Design: Onshore

Slide 11

e-

-ve +ve

Shore Crossing CP Design

Slide 12

What do the Pipeline codes say?

AS2885.4 DNV OS F101

DNV OS F101 Appendix F

Shore Crossing CP Design

Slide 13

Shore Crossing CP Design

Slide 14

Shore Crossing CP Design

Slide 15

e-

Subsea

Galvanic CP

Short Onshore

Pipeline

Onshore pipeline protected by offshore system.

Cathodic Protection Interaction

Slide 16

e-

Offshore anodes draw down the impressed current system.

Cathodic Protection Interaction

Slide 17

Passivated offshore anodes no longer active.

Research Team

Slide 18

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?

Proposed Research

Slide 20

This custom rig will measure the ‘throw’ of a galvanic system.

Test Rig Design

Slide 21

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.

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.