SIST EN ISO 19905-1:2012
(Main)Petroleum and natural gas industries - Site-specific assessment of mobile offshore units - Part 1: Jack-ups (ISO 19905-1:2012)
Petroleum and natural gas industries - Site-specific assessment of mobile offshore units - Part 1: Jack-ups (ISO 19905-1:2012)
This part of ISO 19905 specifies requirements and guidance for the site-specific assessment of independent leg jack-up units for use in the petroleum and natural gas industries. It addresses a) manned non-evacuated, manned evacuated and unmanned jack-ups; b) the installed phase at a specific site. To ensure acceptable reliability, the provisions of this part of ISO 19905 form an integrated approach, which is used in its entirety for the site-specific assessment of a jack-up. This part of ISO 19905 does not apply specifically to mobile offshore drilling units operating in regions subject to sea ice and icebergs. When assessing a jack-up operating in such areas, it is intended that the assessor supplement the provisions of this part of ISO 19905 with the provisions relating to ice actions and procedures for ice management contained in ISO 19906. This part of ISO 19905 does not address design, transportation to and from site, or installation and removal from site. However, it is advisable that the assumptions used in the assessment be checked against the as-installed configuration.
Erdöl- und Erdgasindustrie - Offshore Anlagen; Beurteilung von mobilen Offshore Einheiten bezüglich ihres Einsatzgebietes - Teil 1: Hubinseln (ISO 19905-1:2012)
Industries du pétrole et du gaz naturel - Évaluation spécifique au site d'unités mobiles en mer - Partie 1: Plates-formes auto-élévatrices (ISO 19905-1:2012)
Industrija za predelavo nafte in zemeljskega plina - Ocenjevanje mobilnih naftnih ploščadi na področju postavitve - 1. del: Dvižne ploščadi (ISO 19905-1:2012)
Ta del standarda ISO 19905 določa zahteve in smernice za ocenjevanje dvižnih ploščadi s samostojnimi nogami za uporabo v industriji za predelavo nafte in zemeljskega plina. Obravnava a) neevakuirane dvižne ploščadi s posadko, evakuirane dvižne ploščadi s posadko in dvižne ploščadi brez posadke; b) fazo postavitve na določenem področju. Pri določbah tega dela standarda ISO 19905 je zaradi zagotavljanja sprejemljive zanesljivosti uporabljen celostni pristop, ki se v celoti uporablja za ocenjevanje dvižne ploščadi na področju postavitve. Ta del standarda ISO 19905 se ne uporablja samo za mobilne vrtalne naftne ploščadi, ki se uporabljajo v regijah, kjer se na morju pojavlja led in ledene gore. Pri ocenjevanju dvižne ploščadi, ki obratuje na teh območjih, naj bi ocenjevalec določbe tega dela standarda ISO 19905 nadomestil z določbami v zvezi z ukrepi in postopki za ravnanje v primeru ledu iz standarda ISO 19906. Ta del standarda ISO 19905 ne obravnava načrtovanja, prevoza na mesto ali z njega ali namestitve na mesto in odstranitve z njega. Vendar je priporočljivo, da se predpostavke, ki se uporabljajo pri ocenjevanju, preverijo glede na konfiguracijo pri namestitvi.
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 19905-1:2012
01-oktober-2012
,QGXVWULMD]DSUHGHODYRQDIWHLQ]HPHOMVNHJDSOLQD2FHQMHYDQMHPRELOQLKQDIWQLK
SORãþDGLQDSRGURþMXSRVWDYLWYHGHO 'YLåQHSORãþDGL ,62
Petroleum and natural gas industries - Site-specific assessment of mobile offshore units
- Part 1: Jack-ups (ISO 19905-1:2012)
Erdöl- und Erdgasindustrie - Offshore Anlagen; Beurteilung von mobilen Offshore
Einheiten bezüglich ihres Einsatzgebietes - Teil 1: Hubinseln (ISO 19905-1:2012)
Industries du pétrole et du gaz naturel - Évaluation spécifique au site d'unités mobiles en
mer - Partie 1: Plates-formes auto-élévatrices (ISO 19905-1:2012)
Ta slovenski standard je istoveten z: EN ISO 19905-1:2012
ICS:
75.180.10 Oprema za raziskovanje in Exploratory and extraction
odkopavanje equipment
SIST EN ISO 19905-1:2012 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 19905-1:2012
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SIST EN ISO 19905-1:2012
EUROPEAN STANDARD
EN ISO 19905-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2012
ICS 75.180.10
English Version
Petroleum and natural gas industries - Site-specific assessment
of mobile offshore units - Part 1: Jack-ups (ISO 19905-1:2012)
Industries du pétrole et du gaz naturel - Évaluation Erdöl- und Erdgasindustrie - Beurteilung von mobilen
spécifique au site d'unités mobiles en mer - Partie 1: Offshore Einheiten bezüglich ihres Einsatzgebietes - Teil 1:
Plates-formes auto-élévatrices (ISO 19905-1:2012) Hubinseln (ISO 19905-1:2012)
This European Standard was approved by CEN on 16 June 2012.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 19905-1:2012: E
worldwide for CEN national Members.
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SIST EN ISO 19905-1:2012
EN ISO 19905-1:2012 (E)
Contents Page
Foreword .3
2
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SIST EN ISO 19905-1:2012
EN ISO 19905-1:2012 (E)
Foreword
This document (EN ISO 19905-1:2012) has been prepared by Technical Committee ISO/TC 67 "Materials,
equipment and offshore structures for petroleum, petrochemical and natural gas industries" in collaboration
with Technical Committee CEN/TC 12 “Materials, equipment and offshore structures for petroleum,
petrochemical and natural gas industries” the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by February 2013, and conflicting national standards shall be withdrawn
at the latest by February 2013.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 19905-1:2012 has been approved by CEN as a EN ISO 19905-1:2012 without any
modification.
3
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SIST EN ISO 19905-1:2012
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SIST EN ISO 19905-1:2012
INTERNATIONAL ISO
STANDARD 19905-1
First edition
2012-08-01
Petroleum and natural gas industries —
Site-specific assessment of mobile
offshore units —
Part 1:
Jack-ups
Industries du pétrole et du gaz naturel — Évaluation spécifique au site
d'unités mobiles en mer —
Partie 1: Plates-formes auto-élévatrices
Reference number
ISO 19905-1:2012(E)
©
ISO 2012
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SIST EN ISO 19905-1:2012
ISO 19905-1:2012(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2012
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2012 – All rights reserved
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SIST EN ISO 19905-1:2012
ISO 19905-1:2012(E)
Contents Page
Foreword . v
Introduction . vii
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 2
4 Symbols and abbreviated terms . 13
4.1 Symbols . 13
4.2 Abbreviated terms . 14
5 Overall considerations . 15
5.1 General . 15
5.2 Assessment approach . 16
5.3 Selection of limit states . 18
5.4 Determination of assessment situations . 18
5.5 Exposure levels . 20
5.6 Analytical tools . 23
6 Data to assemble for each site . 24
6.1 Applicability . 24
6.2 Jack-up data . 24
6.3 Site and operational data . 24
6.4 Metocean data . 24
6.5 Geophysical and geotechnical data . 25
6.6 Earthquake data . 26
7 Actions. 26
7.1 Applicability . 26
7.2 General . 26
7.3 Metocean actions . 27
7.4 Functional actions . 28
7.5 Displacement dependent effects . 28
7.6 Dynamic effects . 28
7.7 Earthquakes . 28
7.8 Other actions . 28
8 Structural modelling . 28
8.1 Applicability . 28
8.2 Overall considerations . 28
8.3 Modelling the leg . 29
8.4 Modelling the hull . 30
8.5 Modelling the leg-to-hull connection . 30
8.6 Modelling the spudcan and foundation . 31
8.7 Mass modelling . 32
8.8 Application of actions . 32
9 Foundations . 35
9.1 Applicability . 35
9.2 General . 35
9.3 Geotechnical analysis of independent leg foundations . 36
9.4 Other considerations . 39
10 Structural response . 41
10.1 Applicability . 41
© ISO 2012 – All rights reserved iii
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SIST EN ISO 19905-1:2012
ISO 19905-1:2012(E)
10.2 General considerations .41
10.3 Types of analyses and associated methods .41
10.4 Common parameters .42
10.5 Storm analysis .44
10.6 Fatigue analysis .47
10.7 Earthquake analysis .47
10.8 Accidental situations .47
10.9 Alternative analysis methods .48
11 Long-term applications .48
11.1 Applicability .48
11.2 Assessment data .48
11.3 Special requirements .49
11.4 Survey requirements .50
12 Structural strength.50
12.1 Applicability .50
12.2 Classification of member cross-sections .51
12.3 Section properties of non-circular prismatic members .52
12.4 Effects of axial force on bending moment .53
12.5 Strength of tubular members .53
12.6 Strength of non-circular prismatic members .53
12.7 Assessment of joints .53
13 Acceptance criteria .54
13.1 Applicability .54
13.2 General formulation of the assessment check .55
13.3 Leg strength assessment .55
13.4 Spudcan strength assessment .56
13.5 Holding system strength assessment .56
13.6 Hull elevation assessment .56
13.7 Leg length reserve assessment .56
13.8 Overturning stability assessment .57
13.9 Foundation integrity assessment .57
13.10 Interaction with adjacent infrastructure .58
13.11 Temperatures .59
Annex A (informative) Additional information and guidance .60
Annex B (normative) Summary of partial action and partial resistance factors . 238
Annex C (informative) Additional information on structural modelling and response analysis . 240
Annex D (informative) Foundations — Recommendations for the acquisition of site-specific
geotechnical data. 250
Annex E (informative) Foundations — Additional information and alternative approaches . 256
Annex F (informative) Informative annex on Clause A.12 — Structural strength . 269
Annex G (informative) Contents list for typical site-specific assessment report . 283
Annex H (informative) Regional information . 290
Bibliography . 299
iv © ISO 2012 – All rights reserved
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SIST EN ISO 19905-1:2012
ISO 19905-1:2012(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 19905-1 was prepared by Technical Committee ISO/TC 67, Materials, equipment and offshore structures
for petroleum, petrochemical and natural gas industries, Subcommittee SC 7, Offshore structures.
ISO 19905 consists of the following parts, under the general title Petroleum and natural gas industries — Site-
specific assessment of mobile offshore units:
Part 1: Jack-ups
Part 2: Jack-ups commentary and detailed sample calculation [Technical Report]
The following part is under preparation:
Part 3, dealing with the site-specific assessment of mobile floating units.
ISO 19905 is one of a series of International Standards for offshore structures. The full series consists of the
following International Standards:
ISO 19900, Petroleum and natural gas industries — General requirements for offshore structures
ISO 19901-1, Petroleum and natural gas industries — Specific requirements for offshore structures —
Part 1: Metocean design and operating considerations
ISO 19901-2, Petroleum and natural gas industries — Specific requirements for offshore structures —
Part 2: Seismic design procedures and criteria
ISO 19901-3, Petroleum and natural gas industries — Specific requirements for offshore structures —
Part 3: Topsides structure
ISO 19901-4, Petroleum and natural gas industries — Specific requirements for offshore structures —
Part 4: Geotechnical and foundation design considerations
ISO 19901-5, Petroleum and natural gas industries — Specific requirements for offshore structures —
Part 5: Weight control during engineering and construction
ISO 19901-6, Petroleum and natural gas industries — Specific requirements for offshore structures —
Part 6: Marine operations
© ISO 2012 – All rights reserved v
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SIST EN ISO 19905-1:2012
ISO 19905-1:2012(E)
ISO 19901-7, Petroleum and natural gas industries — Specific requirements for offshore structures —
Part 7: Stationkeeping systems for floating offshore structures and mobile offshore units
1)
ISO 19901-8 , Petroleum and natural gas industries — Specific requirements for offshore structures —
Part 8: Marine soils investigations
ISO 19902, Petroleum and natural gas industries — Fixed steel offshore structures
ISO 19903, Petroleum and natural gas industries — Fixed concrete offshore structures
ISO 19904-1, Petroleum and natural gas industries — Floating offshore structures — Part 1: Monohulls,
semi-submersibles and spars
ISO 19905-1, Petroleum and natural gas industries — Site-specific assessment of mobile offshore
units — Part 1: Jack-ups
ISO/TR 19905-2, Petroleum and natural gas industries — Site-specific assessment of mobile offshore
units — Part 2: Jack-ups commentary and detailed sample calculation
2 )
, Petroleum and natural gas industries — Site-specific assessment of mobile offshore
ISO 19905-3
units — Part 3: Floating units
ISO 19906, Petroleum and natural gas industries — Arctic offshore structures
1) Under preparation. It is also expected that there will be further parts of ISO 19901.
2) Under preparation.
vi © ISO 2012 – All rights reserved
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SIST EN ISO 19905-1:2012
ISO 19905-1:2012(E)
Introduction
The series of International Standards applicable to types of offshore structure, ISO 19900 to ISO 19906,
addresses design requirements and assessments for all offshore structures used by the petroleum and natural
gas industries worldwide. Through their application, the intention is to achieve reliability levels appropriate for
manned and unmanned offshore structures, whatever the type of structure and the nature or combination of
the materials used.
It is important to recognize that structural integrity is an overall concept comprising models for describing
actions, structural analyses, design or assessment rules, safety elements, workmanship, quality control
procedures and national requirements, all of which are mutually dependent. The modification of one aspect of
design or assessment in isolation can disturb the balance of reliability inherent in the overall concept or
structural system. The implications involved in modifications, therefore, need to be considered in relation to
the overall reliability of offshore structural systems.
The series of International Standards applicable to the various types of offshore structure is intended to
provide a wide latitude in the choice of structural configurations, materials and techniques, without hindering
innovation. Sound engineering judgement is therefore necessary in the use of these International Standards.
[7]
This part of ISO 19905, which has been developed from SNAME Technical & Research Bulletin 5-5A , states
the general principles and basic requirements for the site-specific assessment of mobile jack-ups; it is
intended to be used for assessment and not for design.
NOTE For the exposure level 1(L1) assessment and, where appropriate, the exposure level 2 (L2) assessment prior
to evacuation being effected, this part of ISO 19905 requires the use of 50 year independent or 100 year joint probability
metocean extremes, together with associated partial action factors. It is based on extensive benchmarking and best
practice in the international community.
Site-specific assessment is normally carried out when an existing jack-up unit is to be installed at a specific
site. The assessment is not intended to provide a full evaluation of the jack-up; it assumes that aspects not
addressed herein have been addressed using other practices and standards at the design stage. In some
instances, the original design of all or part of the structure could be in accordance with other standards in the
ISO 19900 series, and in some cases, different practices or standards could have been applied.
The purpose of the site assessment is to demonstrate the adequacy of the jack-up and its foundations for the
assessment situations and defined limit states, taking into account the consequences of failure. It is important
that the results of a site-specific assessment be appropriately recorded and communicated to those persons
required to know or act on the conclusions and recommendations. Alternative approaches to the site-specific
assessment can be used, provided that they have been shown to give a level of structural reliability equivalent,
or superior, to that implicit in this part of ISO 19905.
Annex A provides background to and guidance on the use of this part of ISO 19905. The clause numbering in
Annex A is the same as in the normative text in order to facilitate cross-referencing. ISO/TR 19905-2 provides
additional background to some clauses and a detailed sample 'go-by' calculation.
Annex B summarizes the partial factors. Supplementary information is presented in Annexes C to H.
To meet certain needs of industry for linking software to specific elements in this part of ISO 19905, a special
numbering system has been permitted for figures, tables, equations and bibliographic references.
In International Standards, the following verbal forms are used:
“shall” and “shall not” are used to indicate requirements strictly to be followed in order to conform to the
document and from which no deviation is permitted;
© ISO 2012 – All rights reserved vii
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SIST EN ISO 19905-1:2012
ISO 19905-1:2012(E)
“should” and “should not” are used to indicate that, among several possibilities, one is recommended as
particularly suitable, without mentioning or excluding others, or that a certain course of action is preferred
but not necessarily required, or that (in the negative form) a certain possibility or course of action is
deprecated but not prohibited;
“may” is used to indicate a course of action permissible within the limits of the document;
“can” and “cannot” are used for statements of possibility and capability, whether material, physical or
causal.
viii © ISO 2012 – All rights reserved
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SIST EN ISO 19905-1:2012
INTERNATIONAL STANDARD ISO 19905-1:2012(E)
Petroleum and natural gas industries — Site-specific
assessment of mobile offshore units —
Part 1:
Jack-ups
1 Scope
This part of ISO 19905 specifies requirements and guidance for the site-specific assessment of independent
leg jack-up
...
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