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ISO 19905-3:2017

Withdrawn
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A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.

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withdrawn

A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.

Petroleum and natural gas industries Site-specific assessment of mobile offshore units Part 3: Floating unit
Available format(s)

Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users

Withdrawn date

08-03-2021

Language(s)

English, French

Published date

11-10-2017

ISO 19905-3 specifies requirements and gives guidance for the site-specific assessment of mobile floating units for use in the petroleum and natural gas industries. It addresses the installed phase, at a specific site, of manned non-evacuated, manned evacuated and unmanned mobile floating units.

ISO 19905-3 addresses mobile floating units that are monohull (e.g. ship-shaped vessels or barges); column-stabilized, commonly referred to as semi-submersibles; or other hull forms (e.g. cylindrical/conical shaped). It is not applicable to tension leg platforms. Stationkeeping can be provided by a mooring system, a thruster assisted mooring system, or dynamic positioning. The function of the unit can be broad, including drilling, floatel, tender assist, etc. In situations where hydrocarbons are being produced, there can be additional requirements.

The requirements of ISO 19905-3 apply to the hull and stationkeeping system for all types of mobile units. The activity specific operating guideline document requirements can be modified to be appropriate to the situation being assessed.

ISO 19905-3 does not address all site considerations, and certain specific locations can require additional assessment.

ISO 19905-3 is applicable only to mobile floating units that are structurally sound and adequately maintained, which is normally demonstrated through holding a valid RCS classification certificate.

ISO 19905-3 does not address design, transportation to and from site, or installation and removal from site.

ISO 19905-3 sets out the requirements for site-specific assessments, but generally relies on other documents to supply the details of how the assessments are to be undertaken. In general:

- ISO 199017 is referenced for the assessment of the stationkeeping system;

- ISO 199041 is referenced to determine the metocean actions on the unit;

- ISO 19906 is referenced for arctic and cold regions;

- the hull structure and airgap are assessed by use of a comparison between the site-specific metocean conditions and its design conditions, as set out in the RCS approved operations manual;

- ISO 136241 and ISO/TR 136242[1] are referenced for the assessment of the marine drilling riser of mobile floating drilling units. Equivalent alternative methodologies can be used;

- IMCA M 220[5] is referenced for developing an activity specific operating guidelines. Agreed alternative methodologies can be used.

NOTE 1 The scope of ISO 199041 specifically states that its requirements do not apply to mobile units, but the methodologies given for assessing metocean actions can be used.

NOTE 2 RCS rules and the IMO MODU code[4] provide guidance for design and general operation of mobile floating units.

DevelopmentNote
Supersedes ISO/DIS 19905-3. (10/2017)
DocumentType
Standard
Pages
21
PublisherName
International Organization for Standardization
Status
Withdrawn
SupersededBy

18/30337228 DC : 0 BS EN ISO 19900 - PETROLEUM AND NATURAL GAS INDUSTRIES - GENERAL REQUIREMENTS FOR OFFSHORE STRUCTURES

ISO 19901-2:2017 Petroleum and natural gas industries Specific requirements for offshore structures Part 2: Seismic design procedures and criteria
IMCA M 220 : NOV 2012 GUIDANCE ON OPERATIONAL ACTIVITY PLANNING
ISO/TR 13624-2:2009 Petroleum and natural gas industries Drilling and production equipment Part 2: Deepwater drilling riser methodologies, operations, and integrity technical report
ISO 19905-1:2016 Petroleum and natural gas industries — Site-specific assessment of mobile offshore units — Part 1: Jack-ups
IMO I810 : 2010 2009 MODU CODE

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