Atteris managed the generation of revised metocean data specific to the Phase 3 pipeline route, and based on this data performed a 3D stability analysis in accordance with DNV-RP-F109 to assess the stability of the flowline.
Atteris’ in-house and DNV verified stability software CORUS-3D was used to perform the analysis. The analysis considered the effect of random sea states, and assessed the lateral displacement of the flowline, stresses and tensions in flowline, and potential movement at the flowline end termination location.
Based on the findings of the 3D analysis, it was concluded that the flowline, has adequate self-stability for the design metocean conditions. The FEED design requirements for secondary stabilisation were reduced accordingly.