Dnv-rp-f118 Today
DNV-RP-F118 is a critical Recommended Practice (RP) for the offshore energy sector, providing a standardized framework for the qualification and validation of Automated Ultrasonic Testing (AUT) systems used on pipeline girth welds.
Whether you are assessing the remaining fatigue life of a 20-year-old mooring chain, planning an ROV inspection campaign for a pipeline crossing, or defending your integrity strategy to a regulator, this Recommended Practice provides the answer. It is not just a document—it is a discipline. dnv-rp-f118
- Load factor for wave: 1.30 for ULS
- Fatigue safety factor: 10 for the touchdown point (TDP) because it's not repairable by ROV without riser lift.
- Fabrication: UT (ultrasonic testing) 100% of girth welds, with acceptance criteria per DNVGL-OS-F101, annex A.
- VIV suppression: Fairings or helical strakes required if fatigue life < 100 years under VIV only.
Final Takeaway: Do not treat it as "recommended reading." Treat it as required engineering practice. DNV-RP-F118 is a critical Recommended Practice (RP) for
Sample Sizes: While basic statistical "confidence" requires at least 29 samples, DNV-RP-F118 often recommends significantly more, such as 91 samples for specific weld types like double V submerged arc welds. 2. Sizing Accuracy Load factor for wave: 1
4. Mitigation Strategies (Hierarchy of Controls) Based on the assessed risk, F118 recommends a hierarchy:
