Subsea, Pipelines & Integrity

Analysis topics

• Wall thickness. Screen a pipeline wall across the design codes (DNV-ST-F101, ASME B31, PD 8010) and get a one-page report.
• On-bottom stability. Check stability of a subsea line in waves and current (DNV-RP-F109).
• Free-span / VIV. Screen a free span for vortex-induced vibration and allowable length (DNV-RP-F105).
• Lateral & upheaval buckling. Check a line for snake buckling under pressure and temperature, and the cover a buried line needs.
• Fitness-for-service. Assess a corroded line from wall-thickness readings against its design pressure.
• Cathodic protection (screening). Sacrificial-anode demand and mass screening for offshore structures (DNV-RP-B401) and pipeline bracelet anodes (DNV-RP-F103). Project use requires qualified inputs and an engineer-of-record check; it does not establish that an installed system is protected.

Fitness-for-service assessment covers remaining strength from wall-thickness readings against the design pressure. The client receives a calculation report with a stated decision: accept, re-rate, take more measurements, or escalate.