Integrity Management of Unpiggable Pipeline

Information

Client: Arrow Energy
Location: Surat Basin, QLD
Scope:
Date:
Project Length: 12 months
Value:

Industry

Oil & Gas

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.

Key Achievements

  • 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 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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