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Ageing and Life Extension of Offshore Facilities

Editor
Mamdouh M. Salama
Mamdouh M. Salama
MMS4Aim LLC, USA
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Alex Stacey
Alex Stacey
Health and Safety Executive, UK
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Gerhard Ersdal
Gerhard Ersdal
Petroleum Safety Authority, Norway
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ISBN:
9780791885789
No. of Pages:
326
Publisher:
ASME
Publication date:
2022

The mooring systems on floating offshore installations are typically designed for a life of 25 years. Life extension of installations beyond the original design life thus requires either mooring system replacement or assessment to document life extension of the mooring system components. Mooring chains are normally the components with the shortest design life, where the design codes define how break strength and fatigue capacity reduce with time, due to an annual expected corrosion loss.

Equinor has replaced many mooring chains, and these have been thoroughly inspected, where some have been tested to document actual break capacity and fatigue capacity. The...

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