Case study: CUI Screening of 38 km of Piping at a UAE Gas Plant | Riis Energy Services

Le défi

The operator had 38 km of insulated carbon-steel piping operating between 60 °C and 175 °C, with two CUI leaks in 18 months and no reliable data on where the next one would occur. Removing insulation everywhere would have cost more than the annual maintenance budget.

Notre solution

Northline ran a risk-based screening: PEC on 100% of accessible lines, profile RT at supports and dead legs, and PAUT follow-up at 1,240 flagged locations. Results fed a remaining-life model and a prioritised repair list.

Les résultats

Insulation removal was limited to 6% of the piping. 17 locations below minimum required thickness were repaired before failure. No CUI leaks in the 12 months after completion.

Chronologie

1. Week 1 Mobilisation & risk ranking

   Crew mobilised, P&IDs reviewed, 38 km ranked by CUI susceptibility.

2. Weeks 2–8 PEC and profile RT screening

   Full screening of accessible lines, 1,240 locations flagged.

3. Weeks 9–12 PAUT follow-up

   Quantitative wall-thickness mapping at flagged locations.

4. Weeks 13–14 Remaining-life model & repair plan

   Prioritised repair list delivered, 17 critical items fixed.