Standards › Mooring

Mooring line fatigue

Mooring line fatigue (API RP 2SK / DNV-OS-E301)

Ask Deckhand to estimate the fatigue life of a chain or wire mooring line from its tension cycles, to the offshore mooring codes — the assumptions traced.

Run it on Open Deck Mooring fatigue calculator

What you can ask it to do

  • Estimate fatigue life of a chain or wire mooring line from its tension-cycle history.
  • Apply T-N / S-N data for the component and report the damage and the safety factor.
  • Flag the governing line and where life falls short of the design service life.

Related standards

API RP 2SK DNV-OS-E301 Mooring fatigue T-N curves Tension cycles

Part of Floating & Marine Systems · see the platform engine

Questions

How is mooring fatigue estimated?

From the line's tension-cycle history and the component T-N (or S-N) data, accumulating damage by Miner's rule against the design service life. Deckhand reports the damage, the implied life and the governing line.

Which codes apply?

Offshore station-keeping codes — API RP 2SK and DNV-OS-E301 — govern mooring strength and fatigue; the component fatigue data depends on chain, wire or connector type.

Run Mooring line fatigue on your own inputs

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