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Document API RP 2SK is offered by IHS as part of an online subscription. This subscription contains many documents on the same topic.
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API RP 2SK Document Information:
Title
Design and Analysis of Stationkeeping Systems for Floating Structures
American Petroleum Institute
Publication Date:
Oct 1, 2005
Scope:
The purpose of this document is to present a rational method for
analyzing, designing or evaluating station-keeping systems used for
floating units. This method provides a uniform analysis tool which,
when combined with an understanding of the environment at a
particular location, the characteristics of the unit being moored,
and other factors, can be used to determine the adequacy and safety
of the mooring system. This document addresses station-keeping
system (mooring, dynamic positioning, or thruster-assisted mooring)
design, analysis, and operation. Different design requirements for
mobile and permanent moorings are provided.
The design procedure specified in this document is based on a
deterministic approach where the mooring system responses such as
line tensions, vessel offsets, and anchor loads are evaluated for a
design environment defined by a return period. The mooring system
responses are then checked against the mooring strength, offset
limit, and anchor capacity to ensure a factor of safety against
mooring breakage or excessive vessel excursion. It should be noted
that mooring designs based on this approach may not have the same
level of reliability, as discussed in Appendix G.
The technology of mooring floating units is growing rapidly. In
those areas where data considered adequate were available, specific
and detailed recommendations are given. In other areas general
statements are used to indicate that consideration should be given
to those particular points. Designers are encouraged to utilize all
research advances available to them. As offshore knowledge
continues to grow, this document will be revised. It is hoped that
the general statements contained herein will gradually be replaced
by detailed recommendations.
This document does not address mooring inspection/maintenance
requirements and synthetic fiber rope mooring. These issues are
addressed in the following API documents:
• API RP 2I, Recommended Practice for In-Service Inspection of
Mooring Hardware for Floating Drilling Units (Reference 1).
• API RP 2SM, Recommended Practice for Design, Manufacturing,
and Maintenance of Synthetic Fiber Ropes for Offshore Mooring
(Reference 2).
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