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Integrity Management of (Braemar 2) Unpiggable Pipeline

Scope

The asset integrity strategy for unpiggable sections of the Braemar 2 Gas Pipeline comprised of a direct assessment program following AS2885.3 ‘four-element’ approach and adopting the NACE Standards for Internal Corrosion Direct Assessment (ICDA) and External Corrosion Direct Assessment (ECDA) as a guideline.

Project Summary

  • Formulated integrity assessment program basis and strategy incorporating the long term asset management requirements of the unpiggable sections of the Braemar 2 Gas Pipeline.
  • Segmented the pipeline into different regions based on pipeline design, construction, and operation history which enabled the development of a ‘risk-based approach’ supporting the future operation of the pipeline.
  • Completed the following activities with zero harm, on time, and on budget:
    • ECDA Indirect Inspection (i.e. DCVG and CIPS)
    • ECDA Direct Examination at 13 Locations
    • ICDA Indirect Inspection (multiphase flow calculations using pipeline characteristics, historical operation data, and pipeline elevation profile)
    • ICDA Direct Examination at 13 Locations
  • This program subsequently enabled a 10 years life review and continued safe operation in compliance with AS2885 and P&G Act.

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