Standards › Pipelines
DNV-RP-F109
On-bottom stability design of submarine pipelines
This page describes on-bottom stability design of submarine pipelines and the associated engineering assessment topics. Project use requires qualified inputs and engineering review.
Assessment topics
- Work out hydrodynamic loads on a pipeline from a sea state and current and the submerged weight it needs.
- Run the absolute-stability and the generalised (allowed-displacement) checks.
- Report the stability utilisation and the concrete-coating or weight needed to pass.
Related standards
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Questions
What is on-bottom stability?
Whether a subsea pipeline stays put on the seabed under wave and current loads, rather than being lifted or pushed sideways. DNV-RP-F109 is the recommended practice for designing it.
What drives the result?
The sea state and current, the pipe's submerged weight (including any concrete coating), the seabed friction, and the allowed displacement.
What governs the coating assessment?
Coating and submerged-weight requirements depend on the stated stability criterion, sea state, current and seabed conditions. Project use requires qualified inputs and engineering review.
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