The Challenge
Holding TA-1 accountability for more than 800 offshore and onshore pipelines is not a scaled-up version of managing one line. Inspection capacity, pigging windows and intervention resources are finite, and the portfolio contains lines of widely different age, service, criticality and inspection history.
The real problem is prioritisation under uncertainty: deciding which anomalies genuinely threaten integrity, which lines need inspection this year, and which can be safely deferred — and being able to defend every one of those decisions.
Our Approach
With 800 pipelines the question is never 'is this line fit for service' — it is 'where does the next inspection dollar change the risk picture'.
VORYX team members held the TA-1 role, setting inspection strategy on a risk basis rather than a fixed calendar. Criticality, consequence, degradation mechanism and inspection history drove the schedule, so that finite inspection capacity went where it changed the risk picture.
Anomaly assessment was standardised across the portfolio — consistent acceptance criteria, consistent fitness-for-service methodology and consistent escalation thresholds — so that a metal-loss feature was assessed the same way regardless of which line or which inspection vendor reported it.
Pigging and ILI programmes were specified with attention to what the tool could actually detect and size in each line, including unpiggable and difficult-to-pig lines where alternative assurance strategies had to be developed.
What We Delivered
- TA-1 technical authority accountability across the pipeline portfolio
- Risk-based inspection strategy and prioritisation framework
- ILI and pigging programme specification and vendor performance review
- Standardised anomaly assessment and acceptance criteria
- Fitness-for-service assessment of corroded and damaged lines
- Repair, re-rating and intervention recommendations
- Integrity management system governance and assurance reporting
The Outcome
- Consistent, defensible integrity decisions across 800+ pipelines
- Inspection resources directed by risk rather than by calendar
- Anomaly response standardised across lines and inspection vendors
- Assurance position that withstands internal and regulatory audit
Standards Applied
- DNV-ST-F101
- DNV-RP-F101
- API RP 1160
- ASME B31.8S
- BS 7910
- ISO 55000
Operator and project names are anonymised for confidentiality and disclosed on request. Experience described is that of VORYX team members.
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