SIST EN ISO 19900:2004
(Main)Petroleum and natural gas industries - General requirements for offshore structures (ISO 19900:2002)
Petroleum and natural gas industries - General requirements for offshore structures (ISO 19900:2002)
ISO 19900:2002 specifies general principles for the design and assessment of structures subjected to known or foreseeable types of actions. These general principles are applicable worldwide to all types of offshore structures including bottom-founded structures as well as floating structures and to all types of materials used including steel, concrete and aluminium.
ISO 19900:2002 specifies design principles that are applicable to the successive stages in construction (namely fabrication, transportation and installation), to the use of the structure during its intended life and to its decommissioning. Generally, the principles are also applicable to the assessment or modification of existing structures. Aspects related to quality control are also addressed.
ISO 19900:2002 is applicable to the design of complete structures including substructures, topsides structures, vessel hulls, foundations and mooring systems.
Erdöl- und Erdgasindustrie - Allgemeine Anforderungen an Offshore-Bauwerke (ISO 19900:2002)
Industries du pétrole et du gaz naturel - Exigences générales pour les structures en mer (ISO 19900:2002)
L'ISO 19900:2002 spécifie les principes généraux régissant la conception et l'évaluation de structures soumises à des types d'actions connus ou prévisibles. Ces principes généraux sont applicables dans toutes les parties du monde, à tous les types d'ouvrages en mer, aussi bien les structures prenant appui sur le fond marin que les structures flottantes, ainsi qu'à tous les types de matériaux utilisés, y compris l'acier, le béton et l'aluminium.
L'ISO 19900:2002 spécifie les principes de conception qui s'appliquent également à la construction pendant ses étapes successives (à savoir la fabrication, le transport et l'installation), à l'utilisation de la structure pendant sa durée de vie escomptée, et à son abandon. Généralement, ces principes sont également applicables à la réévaluation ou à la modification de structures existantes. Les aspects liés aux contrôles de qualité sont aussi traités dans cette norme.
L'ISO 19900:2002 s'applique à la conception des structures dans leur ensemble, ce qui comprend les substructures, les superstructures, les coques, les fondations et les systèmes d'ancrage.
Petroleum and natural gas industries - General requirements for offshore structures (ISO 19900:2002)
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 19900:2004
01-maj-2004
Petroleum and natural gas industries - General requirements for offshore
structures (ISO 19900:2002)
Petroleum and natural gas industries - General requirements for offshore structures (ISO
19900:2002)
Erdöl- und Erdgasindustrie - Allgemeine Anforderungen an Offshore-Bauwerke (ISO
19900:2002)
Industries du pétrole et du gaz naturel - Exigences générales pour les structures en mer
(ISO 19900:2002)
Ta slovenski standard je istoveten z: EN ISO 19900:2002
ICS:
75.180.10 Oprema za raziskovanje in Exploratory and extraction
odkopavanje equipment
SIST EN ISO 19900:2004 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 19900:2004
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SIST EN ISO 19900:2004
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SIST EN ISO 19900:2004
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SIST EN ISO 19900:2004
INTERNATIONAL ISO
STANDARD 19900
First edition
2002-12-01
Petroleum and natural gas industries —
General requirements for offshore
structures
Industries du pétrole et du gaz naturel — Exigences générales pour les
structures en mer
Reference number
ISO 19900:2002(E)
©
ISO 2002
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SIST EN ISO 19900:2004
ISO 19900:2002(E)
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ii © ISO 2002 — All rights reserved
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SIST EN ISO 19900:2004
ISO 19900:2002(E)
Contents Page
Foreword. v
Introduction . vii
1 Scope. 1
2 Terms and definitions. 1
3 Symbols and abbreviated terms. 5
3.1 Symbols . 5
3.2 Abbreviated terms. 6
4 General requirements and conditions . 6
4.1 Fundamental requirements. 6
4.2 Durability, maintenance and inspection. 6
4.3 Hazards . 7
4.4 Design basis . 7
4.5 Service requirements. 8
4.6 Operating requirements . 8
4.7 Special requirements. 8
4.8 Location and orientation . 8
4.9 Structural configuration . 9
4.10 Environmental conditions. 10
4.11 Construction. 14
4.12 Decommissioning and removal. 14
5 Principles of limit states design . 14
5.1 Limit states . 14
5.2 Design . 16
6 Basic variables . 16
6.1 General. 16
6.2 Actions . 16
6.3 Properties of materials and soils . 19
6.4 Geometrical parameters. 19
7 Analyses — calculations and testing. 19
7.1 General. 19
7.2 Calculation. 20
7.3 Model testing . 20
7.4 Prototype testing. 20
7.5 Existing reference. 20
8 Design format of partial factors. 20
8.1 Principles . 20
8.2 Actions and their combinations . 21
8.3 Properties of materials and soils . 23
8.4 Geometrical parameters. 24
8.5 Uncertainties of calculation models . 24
8.6 Determination of values for partial factors. 24
9 Quality control. 24
9.1 General. 24
9.2 Responsibilities. 25
9.3 Inspection and testing. 25
9.4 In-service inspection, maintenance and repair. 25
9.5 Records and documentation. 25
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SIST EN ISO 19900:2004
ISO 19900:2002(E)
10 Assessment of existing structures.26
10.1 General .26
10.2 Condition assessment .26
10.3 Action assessment.27
10.4 Resistance assessment.27
10.5 Component and system failure consequences and mitigation.27
10.6 Fatigue.27
Bibliography.28
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SIST EN ISO 19900:2004
ISO 19900:2002(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.
ISO 19900 was prepared by Technical Committee ISO/TC 67, Petroleum and natural gas industries,
Subcommittee SC 7, Offshore structures.
This first edition of ISO 19900 cancels and replaces ISO 13819-1:1995, which has been editorially revised.
ISO 19900 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 19901-4, 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
The following International Standards are under preparation:
ISO 19901-1, Petroleum and natural gas industries — Specific requirements for offshore structures — Part 1:
Meteocean 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 19901-6, Petroleum and natural gas industries — Specific requirements for offshore structures — Part 6:
Marine operations
ISO 19902, Petroleum and natural gas industries — Fixed steel offshore structures
ISO/TS 19903, Petroleum and natural gas industries — Fixed concrete offshore structures
ISO 19904, Petroleum and natural gas industries — Floating offshore structures including stationkeeping
ISO 19905-1, Petroleum and natural gas industries — Site-specific assessment of mobile offshore units —
Part 1: Jack-ups
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SIST EN ISO 19900:2004
ISO 19900:2002(E)
ISO/TR 19905-2, Petroleum and natural gas industries — Site-specific assessment of mobile offshore units —
Part 2: Jack-ups commentary
ISO 19906, Petroleum and natural gas industries — Arctic offshore structures
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SIST EN ISO 19900:2004
ISO 19900:2002(E)
Introduction
The offshore structures International Standards ISO 19900 to ISO 19906 constitute a common basis covering
those aspects that address design requirements and assessments of all 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 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 rules, safety elements, workmanship, quality control procedures and
national requirements, all of which are mutually dependent. The modification of one aspect of design 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 all
offshore structural systems.
The offshore structures International Standards are 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.
ISO 19900 applies to offshore structures and is in accordance with the principles of ISO 2394 (see Reference
[1] in the Bibliography). It includes, where appropriate, additional provisions that are specific to offshore
structures.
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SIST EN ISO 19900:2004
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SIST EN ISO 19900:2004
INTERNATIONAL STANDARD ISO 19900:2002(E)
Petroleum and natural gas industries — General requirements
for offshore structures
1 Scope
This International Standard specifies general principles for the design and assessment of structures subjected
to known or foreseeable types of actions. These general principles are applicable worldwide to all types of
offshore structures including bottom-founded structures as well as floating structures and to all types of
materials used including steel, concrete and aluminium.
This International Standard specifies design principles that are applicable to the successive stages in
construction (namely fabrication, transportation and installation), to the use of the structure during its intended
life and to its decommissioning. Generally, the principles are also applicable to the assessment or modification
of existing structures. Aspects related to quality control are also addressed.
This International Standard is applicable to the design of complete structures including substructures, topsides
structures, vessel hulls, foundations and mooring systems.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
action
external load applied to the structure (direct action) or an imposed deformation or acceleration (indirect action)
EXAMPLE An imposed deformation can be caused by fabrication tolerances, settlement, temperature change or
moisture variation.
NOTE An earthquake typically generates imposed accelerations.
2.2
action effect
effect of actions on structural components
EXAMPLE Internal force, moment, stress or strain.
2.3
air gap
clearance between the highest water surface that occurs during the extreme environmental conditions and the
lowest exposed part not designed to withstand wave impingement
2.4
appurtenance
part of the structure that is installed to assist installation, to provide access or protection, or for transfer of
fluids
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SIST EN ISO 19900:2004
ISO 19900:2002(E)
2.5
basic variable
one of a specified set of variables representing physical quantities which characterize actions, environmental
influences, geometrical quantities, or material properties including soil properties
2.6
catenary mooring
mooring system where the restoring action is provided by the distributed weight of mooring lines
2.7
characteristic value
value assigned to a basic variable associated with a prescribed probability of not being violated by
unfavourable values during some reference period
NOTE The characteristic value is the main representative value. In some design situations a variable can have two
characteristic values, an upper and a lower value.
2.8
compliant structure
structure that is sufficiently flexible that applied lateral dynamic actions are substantially balanced by inertial
reactions
2.9
conductor
tubular pipe extending upward from the sea floor or below containing pipes that extend into the petroleum
reservoir
2.10
decommissioning
process of shutting down a platform and removing hazardous materials at the end of its production life
2.11
design criteria
quantitative formulations that describe the conditions to be fulfilled for each limit state
2.12
design service life
assumed period for which a structure is to be used for its intended purpose with anticipated maintenance, but
without substantial repair being necessary
2.13
design situation
set of physical conditions representing real conditions during a certain time interval for which the design will
demonstrate that relevant limit states are not exceeded
2.14
design value
value derived from the representative value for use in the design verification procedure
2.15
exposure level
classification system used to define the requirements for a structure based on consideration of life safety and
of environmental and economic consequences of failure
[2]
NOTE The method for determining exposure levels are described in ISO 19902 . An exposure level 1 platform is the
most critical and exposure level 3 the least. A normally manned platform which cannot be reliably evacuated before a
design event will be an exposure level 1 platform.
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SIST EN ISO 19900:2004
ISO 19900:2002(E)
2.16
fit-for-purpose
meeting the intent of an International Standard although not meeting specific provisions of that International
Standard in local areas, such that failure in these areas will not cause unacceptable risk to life-safety or the
environment
2.17
fixed structure
structure that is bottom founded and transfers all actions on it to the seabed
2.18
floating structure
structure where the full weight is supported by buoyancy
2.19
jack-up
mobile offshore unit that can be relocated and is bottom founded in its operating mode
NOTE A jack-up reaches its operational mode by lowering legs to the sea floor and then jacking the hull to the
required elevation.
2.20
mobile offshore unit
MOU
structure intended to be frequently relocated to perform a particular function
2.21
limit state
state beyond which the structure no longer fulfils the relevant design criteria
2.22
nominal value
value assigned to a basic variable determined on a non-statistical basis, typically from acquired experience or
physical conditions
2.23
platform
complete assembly including structure, topsides and, where applicable, foundations
2.24
reference period
period of time used as basis for determining values of basic variables
2.25
reliability
ability of a structure or a structural component to fulfil the specified requirements
2.26
representative value
value assigned to a basic variable for verification of a limit state
2.27
resistance
capacity of a component, or a cross-section of a component, to withstand action effects without failure
2.28
return period
reciprocal of the probability of exceeding an event during a particular period of time
NOTE The return period is the average time (usually in years) between occurrences of an event exceeding a
specified magnitude.
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SIST EN ISO 19900:2004
ISO 19900:2002(E)
2.29
riser
tubular used for the transport of fluids between the sea floor and a termination point on the platform
NOTE For a fixed structure the termination point is usually the topsides. For floating structures the riser may
terminate at other locations of the platform.
2.30
scour
removal of seabed soils caused by currents and waves
NOTE Such erosion can be due to natural processes or can be due to interruption of the natural flow regime near the
sea floor by structural elements.
2.31
splash zone
area of a structure that is frequently wetted due to waves and tidal variations
2.32
structural system
load-bearing components of a structure and the way in which these components function together
2.33
structural component
physically distinguishable part of a structure
EXAMPLE Column, beam, stiffened plate, tubular joint, or foundation pile.
2.34
structural model
idealization of the structural system used for design or assessment
2.35
structure
organized combination of connected parts designed to withstand actions and provide adequate rigidity
2.36
structure orientation
position of a structure in plan referenced to a fixed direction such as true north
2.37
taut-line mooring
mooring system where the restoring action is provided by elastic deformation of mooring lines
2.38
topsides
structures and equipment placed on a supporting structure (fixed or floating) to provide some or all of a
platform’s functions
NOTE 1 For a ship-shaped floating structure, the deck is not part of the topsides.
NOTE 2 For a jack-up, the hull is not part of the topsides.
NOTE 3 A separate fabricated deck or module support frame is part of the topsides.
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SIST EN ISO 19900:2004
ISO 19900:2002(E)
3 Symbols and abbreviated terms
3.1 Symbols
A accidental action
a design value of geometrical parameter
d
a characteristic value of geometrical parameter
k
C constraint (see 5.1.4 and 8.1)
E environmental action
F design value of action
d
F representative value of action
r
f design value of material property, for example strength
d
f characteristic value of material property, for example strength
k
G permanent action
G characteristic value of permanent action
k
Q variable action
Q characteristic value of variable action
k
R design value of component resistance
d
R characteristic value of component resistance, based on characteristic values of material properties
k
γ factor related to model uncertainty or other circumstances that are not taken into account by the other
d
γ values
γ partial action factor of which the value reflects the uncertainty or randomness of the action (see 8.2.2)
f
γ partial material factor of which the value reflects the uncertainty or variability of the material property (see
m
8.3.2)
γ factor by which the importance of the structure and the consequences of failure, including the significance
n
of the type of failure, may be taken into account and of which the value of γ depends on the design
n
situation under consideration
γ partial resistance factor of which the value reflects the uncertainty or variability of the component
R
resistance including those of material properties (see 8.5)
∆ additive partial geometrical quantity of which the value reflects the uncertainties of the geometrical
a
parameter (see 8.4.2)
Ψ reduction factor to account for reduced probability of simultaneous independent actions (see 8.2.3)
0
Ψ , Ψ factors relating characteristic values to representative values for variable actions (see 8.2.1)
1 2
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SIST EN ISO 19900:2004
ISO 19900:2002(E)
3.2 Abbreviated terms
ALS accidental limit state
FLS fatigue limit state
SLS serviceability limit state
ULS ultimate limit state
4 General requirements and conditions
4.1 Fundamental requirements
A structure and its structural components shall be designed, constructed and maintained so that it is suited to
its intended use. In particular, it shall, with appropriate degrees of reliability, fulfil the following performance
requirements:
a) it shall withstand actions liable to occur during its construction and anticipated use (ULS requirement);
b) it shall perform adequately under all expected actions (SLS requirement);
c) it shall not fail under repeated actions (FLS);
d) in the case of hazards (accidental or abnormal events), it shall not be subsequently damaged
disproportionately to the original cause (ALS);
e) appropriate degrees of reliability depend upon:
the cause and mode of failure;
the possible consequences of failure in terms of risk to life, environment and property;
the expense and effort required to reduce the risk of failure;
different requirements at national, regional or local level.
This International Standard provides criteria so that the above requirements are fulfilled during the intended
life of the structure.
A structure designed and constructed in accordance with this International Standard may be assumed to
comply with the above requirements.
4.2 Durability, maintenance and inspection
The durability of the structure in its environment shall be such that the general state of the structure is kept at
an acceptable level during its life.
Maintenance shall include the performance of regular inspections, inspections on special occasions (e.g. after
an earthquake or other severe environmental event), the upgrading of protection systems and repair of
structural components.
Durability of the structure shall be achieved by either
a) a maintenance program, or
b) by designing the structure so as to allow for deterioration in those areas which cannot be, or are not
expected to be, maintained during the planned life of the structure.
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SIST EN ISO 19900:2004
ISO 19900:2002(E)
In the case of a), the structure shall be designed and constructed so that no significant degradation is likely to
occur within the time intervals between the inspections. The necessity of relevant parts of the structure being
available for inspection, without unreasonably complicated dismantling, shall be considered during design.
Degradation may be reduced or prevented by providing a suitable protection system.
The rate of deterioration may be estimated on the basis of calculations, experimental investigations,
experience from other structures or a combination of these.
NOTE Structural integrity, serviceability throughout the intended service life and durability are not simply functions of
the design calculations but are also dependent on the quality cont
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