Case study · 2025
Case study: 4,800-joint Refinery Turnaround with Controlled Bolting | Riis Energy Services
Flange management and controlled bolting of 4,800 joints during a planned refinery turnaround.
- Mongstad, Norway
- Refinery
- 5 weeks
- Field Services & Maintenance Crews
The challenge
The turnaround window was fixed at 32 days and the previous event had 41 leaks at start-up.
Our solution
Northline deployed a 64-person bolting crew with a digital joint register, tagged every joint, and applied ASME PCC-1 assembly procedures with independent QC sign-off.
The results
Start-up with 2 minor leaks (down from 41) and turnaround completed one day early.
Timeline
- T-8 weeks Joint register & procedures
- Days 1–28 Break-out and make-up
- Day 31 Leak test and start-up
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