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Document API RP 2SM 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 2SM Document Information:
Title
Recommended Practice for Design, Manufacture, Installation, and Maintenance of Synthetic Fiber Ropes for Offshore Mooring
American Petroleum Institute
Publication Date:
Mar 1, 2001
Scope:
The main purpose of this document is to provide guidelines on
the use of synthetic fiber ropes for offshore mooring applications.
The secondary purpose of this document is to highlight differences
between synthetic rope and traditional steel mooring systems, and
to provide practical guidance on how to handle these differences
during system design and installation.
Since synthetic fiber rope properties will influence the mooring
system performance, mooring design and analysis; rope design,
testing and manufacturing; rope handling and installation; and rope
inspection and maintenance should be integrated to provide a
consistent mooring system design methodology. Thus this document
covers primarily the following aspects:
a. Design and analysis considerations of mooring system.
b. Design criteria for mooring components.
c. Rope design.
d. Rope specification and testing.
e. Rope manufacture and quality assurance.
f. Rope handling and installation.
g. In-service inspection and maintenance.
The contents of this document should be read in conjunction with
API RP 2SK, Design and Analysis of Stationkeeping Systems for
Floating Structures, Second Edition, December 1996 [1]. Where
the mooring design, construction and installation details are
similar or equivalent to steel wire/chain mooring systems, no
further comments are included in this document.
The production of this document reflects the potential growth in
offshore mooring applications for synthetic fiber ropes and the
need for a consolidated written guidance. At this time the design,
analysis, manufacture, testing and installation procedures vary,
and there is limited in-situ experience with synthetic rope
moorings. Thus where committee members have reached consensus, more
specific recommendations are provided in the document.
Specifically, those items for which the committee members have
reached consensus as being recommended or essential for an adequate
mooring system are identified in the text in conjunction with the
word "should". In other areas, general guidance is included in the
document as general statements and/or commentary notes. The
technology in synthetic fiber rope moorings is growing rapidly.
Designers are advised to take appropriate measures to ensure that
their practices incorporate all research advances available to
them. A technical commentary, which provides a detailed discussion
on deepwater polyester rope mooring technology, has recently been
made available through the DeepStar Joint Industry Project
[31].
This document applies to synthetic fiber ropes used in the form
of taut leg or catenary moorings for both permanent and temporary
offshore installations such as:
a. Monohull based FPSOs.
b. Semi-submersible based FPUs.
c. Mobile Offshore Drilling Units (MODU).
d. SPAR Buoy platforms.
e. CALM Buoy (spread mooring only).
This document is not intended to cover other marine applications
of synthetic fiber ropes such as tanker mooring at piers and
harbours, towing hawsers, mooring hawsers at SPMs, and TLP tethers.
Additionally, very little test data is available for large
synthetic fiber ropes permanently deployed around fairleads and
thus this document is limited to fiber ropes which span freely
between end terminations.
The fiber materials covered in this document include polyester,
HMPE and nylon; and the rope structures include
"wire-rope-construction" and "parallel-strand" types. Other fiber
materials and rope structures may be used, but the recommendations
given must be re-evaluated with considerations of the properties
and performance of these materials and constructions. Furthermore,
the document has been primarily developed based on the test data
and knowledge on polyester ropes. Designers are advised to consult
rope manufacturers when other types of ropes are considered.
As more experience is gained from relevant applications, this
recommended practice will be subject to additions, comments and
revisions. These and continued research and development efforts in
this area will be considered in future editions of this recommended
practice.
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