SIST EN ISO 19904-1:2007

SLOVENSKI STANDARD
SIST EN ISO 19904-1:2007
01-januar-2007
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Petroleum and natural gas industries - Floating offshore structures - Part 1: Monohulls,
semi-submersibles and spars (ISO 19904-1:2006)
Erdöl- und Erdgasindustrie - Schwimmende Offshore-Anlagen - Teil 1: Produktions- und
Lagerungsanlagen außer Tension-Leg-Anlagen (ISO 19904-1:2006)
Industries du pétrole et du gaz naturel - Structures en mer flottantes - Partie 1: Unités
monocoques, unités semi-submersibles et unités spars (ISO 19904-1:2006)
Ta slovenski standard je istoveten z: EN ISO 19904-1:2006
ICS:
75.180.10 Oprema za raziskovanje in Exploratory and extraction
odkopavanje equipment
SIST EN ISO 19904-1:2007 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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EUROPEAN STANDARD
EN ISO 19904-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2006
ICS 75.180.10

English Version
Petroleum and natural gas industries - Floating offshore
structures - Part 1: Monohulls, semi-submersibles and spars
(ISO 19904-1:2006)
Industries du pétrole et du gaz naturel - Structures en mer Erdöl- und Erdgasindustrie - Schwimmende Offshore-
flottantes - Partie 1: Unités monocoques, unités semi- Anlagen - Teil 1: Produktions- und Lagerungsanlagen
submersibles et unités spars (ISO 19904-1:2006) außer Tension-Leg-Anlagen (ISO 19904-1:2006)
This European Standard was approved by CEN on 22 September 2006.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 19904-1:2006: E
worldwide for CEN national Members.

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EN ISO 19904-1:2006 (E)





Foreword


This document (EN ISO 19904-1:2006) has been prepared by Technical Committee ISO/TC 67
"Materials, equipment and offshore structures for petroleum 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 May 2007, and conflicting national standards
shall be withdrawn at the latest by May 2007.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.


Endorsement notice

The text of ISO 19904-1:2006 has been approved by CEN as EN ISO 19904-1:2006 without any
modifications.

2

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INTERNATIONAL ISO
STANDARD 19904-1
First edition
2006-11-01

Petroleum and natural gas industries —
Floating offshore structures —
Part 1:
Monohulls, semi-submersibles and spars
Industries du pétrole et du gaz naturel — Structures en mer flottantes —
Partie 1: Unités monocoques, unités semi-submersibles et unités spars




Reference number
ISO 19904-1:2006(E)
©
ISO 2006

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ISO 19904-1:2006(E)
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ii © ISO 2006 – All rights reserved

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ISO 19904-1:2006(E)
Contents Page
Foreword. vi
Introduction . viii
1 Scope . 1
2 Normative references . 2
3 Terms and definitions. 3
4 Symbols and abbreviated terms . 9
4.1 Symbols . 9
4.2 Abbreviated terms . 10
5 Overall considerations . 12
5.1 Functional requirements. 12
5.2 Safety requirements . 12
5.3 Planning requirements. 13
5.4 Rules and regulations . 14
5.5 General requirements. 14
5.6 Independent verification . 18
5.7 Analytical tools . 18
5.8 In-service inspection and maintenance. 18
5.9 Assessment of existing floating structures. 18
5.10 Reuse of existing floating structures . 19
6 Basic design requirements. 19
6.1 General. 19
6.2 Exposure levels. 19
6.3 Limit states . 22
6.4 Design situations. 23
7 Actions and action effects . 25
7.1 General. 25
7.2 Permanent actions (G). 25
7.3 Variable actions (Q) . 25
7.4 Accidental actions (A). 26
7.5 Environmental actions (E). 27
7.6 Other actions. 35
7.7 Repetitive actions . 35
7.8 Action combinations . 36
8 Global analysis. 36
8.1 General. 36
8.2 Static and mean response analyses. 36
8.3 Global dynamic behaviour. 37
8.4 Frequency domain analysis. 39
8.5 Time domain analysis. 39
8.6 Uncoupled analysis . 40
8.7 Coupled analysis . 40
8.8 Resonant excitation and response . 40
8.9 Platform offset. 40
8.10 Air gap. 40
8.11 Platform motions and accelerations. 41
8.12 Model tests . 41
8.13 Design situations for structural analysis . 42
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ISO 19904-1:2006(E)
9 Structural considerations. 42
9.1 General . 42
9.2 Representative values of actions . 43
9.3 Design scantlings . 44
9.4 Modelling. 45
9.5 Structural analysis . 47
9.6 Structural strength. 49
9.7 Design checks . 50
9.8 Special design issues. 54
9.9 Material. 55
9.10 Corrosion protection of steel. 57
9.11 Fabrication and construction. 57
9.12 Marine operations . 58
9.13 Topsides/hull interface . 58
10 Fatigue analysis and design . 59
10.1 General . 59
10.2 Fatigue damage design safety factors. 60
10.3 Outline of approach . 61
10.4 Environmental data. 62
10.5 Structural modelling . 62
10.6 Hydrostatic analyses . 62
10.7 Response amplitude operators and combinations of actions . 62
10.8 Stresses and SCFs. 63
10.9 Stress range counting and distribution. 63
10.10 Fatigue resistance. 63
10.11 Damage accumulation . 63
10.12 Fracture mechanics methods . 64
10.13 Fatigue-sensitive components and connections. 64
11 Monohulls . 65
11.1 General . 65
11.2 General design criteria . 65
11.3 Structural strength. 66
12 Semi-submersibles . 69
12.1 General . 69
12.2 General design criteria . 69
12.3 Structural strength. 70
13 Spars . 70
13.1 General . 70
13.2 General design requirements . 71
13.3 Structural strength. 72
14 Conversion and reuse . 72
14.1 General . 72
14.2 Minimum design, construction and maintenance standards . 73
14.3 Pre-conversion structural survey. 73
14.4 Effects of prior service . 73
14.5 Corrosion protection and material suitability . 75
14.6 Inspection and maintenance. 75
15 Hydrostatic stability and compartmentation. 75
15.1 General . 75
15.2 Inclining test . 76
15.3 Compartmentation . 76
15.4 Watertight and weathertight appliances. 76
15.5 Special requirements for monohulls. 77
16 Mechanical systems . 77
16.1 General . 77
16.2 Hull systems . 77
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ISO 19904-1:2006(E)
16.3 Import and export systems. 85
16.4 Fire protection systems . 87
17 Stationkeeping systems. 88
17.1 General. 88
17.2 Mooring equipment. 89
17.3 Turret. 90
18 In-service inspection, monitoring and maintenance. 92
18.1 General. 92
18.2 Structural integrity management system philosophies. 92
18.3 Planning considerations . 95
18.4 Implementation issues . 96
18.5 Minimum requirements . 99
Annex A (informative) Additional information and guidance . 104
A.1 Scope . 104
A.2 Normative references . 106
A.3 Terms and definitions. 106
A.4 Symbols and abbreviated terms . 106
A.5 Overall considerations . 107
A.6 Basic design requirements. 111
A.7 Actions and action effects . 113
A.8 Global analysis. 125
A.9 Structural considerations . 128
A.10 Fatigue analysis and design. 134
A.11 Monohulls . 137
A.12 Semi-submersibles. 141
A.13 Spars . 142
A.14 Conversion and reuse . 143
A.15 Hydrostatic stability and compartmentation . 144
A.16 Mechanical systems . 144
A.17 Stationkeeping systems. 154
A.18 In-service inspection, monitoring and maintenance. 155
Bibliography . 172

© ISO 2006 – All rights reserved v

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ISO 19904-1:2006(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 19904-1 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 19904 consists of the following parts, under the general title Petroleum and natural gas industries —
Floating offshore structures:
⎯ Part 1: Monohulls, semi-submersibles and spars
Tension leg platforms is to form the subject of a future Part 2.
ISO 19904 is one of a series of 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 (all parts), Petroleum and natural gas industries — Specific requirements for offshore
structures
1)
⎯ ISO 19902, Petroleum and natural gas industries — Fixed steel offshore structures
1)
⎯ 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 19904-2, Petroleum and natural gas industries — Floating offshore structures — Part 2: Tension leg
2)
platforms
⎯ ISO 19905-1, Petroleum and natural gas industries — Site-specific assessment of mobile offshore units
2)
— Part 1: Jack-ups

1)
To be published.
2)
Under preparation.
vi © ISO 2006 – All rights reserved

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ISO 19904-1:2006(E)
⎯ ISO/TR 19905-2, Petroleum and natural gas industries — Site-specific assessment o
...