Petroleum and natural gas industries - General requirements for offshore structures (ISO 19900:2019)

This document specifies general requirements and recommendations for the design and assessment of bottom-founded (fixed) and buoyant (floating) offshore structures.
This document is applicable for all phases of the life of the structure, including:
— successive stages of construction (i.e. fabrication, transportation, and installation),
— service in-place, both during design life and during any life extensions, and
— decommissioning, and removal.
This document contains general requirements and recommendations for both the design of new build structures and for the structural integrity management and assessment of existing structures.
This document does not apply to subsea and riser systems or pipeline systems.

Erdöl- und Erdgasindustrie - Allgemeine Anforderungen an Offshore-Bauwerke (ISO 19900:2019)

Industries du pétrole et du gaz naturel - Exigences générales relatives aux structures en mer (ISO 19900:2019)

Le présent document spécifie les exigences générales et recommandations régissant la conception et l'évaluation des structures en mer prenant appui sur le fond marin (fixes) et des structures en mer flottantes.
Le présent document s'applique à toutes les phases du cycle de vie de la structure, y compris:
— les étapes successives de construction (c'est-à-dire la fabrication, le transport et l'installation);
— l'exploitation, à la fois pendant la durée de vie de conception et pendant toute prolongation de la durée de vie; et
— l'abandon et l'enlèvement.
Le présent document contient des exigences générales et recommandations à la fois pour la conception de nouvelles structures et pour la gestion et l'évaluation de l'intégrité structurelle des structures existantes.
Le présent document ne s'applique pas aux systèmes sous-marins de tubes conducteurs ou de conduites.

Industrija za predelavo nafte in zemeljskega plina - Splošne zahteve za vrtalne ploščadi (ISO 19900:2019)

Ta dokument določa splošne zahteve in priporočila za načrtovanje ter ocenjevanje na dno pritrjenih (fiksnih) in plovnih (plavajočih) vrtalnih ploščadi.
Ta dokument se uporablja za vse stopnje življenjskega cikla ploščadi in vključuje:
– zaporedne stopnje gradnje (npr. izdelava, prevoz in namestitev),
– delovanje na mestu uporabe tako med predvideno življenjsko dobo kot tudi pri podaljšanju življenjske dobe ter
– prenehanje uporabe in odstranitev.
Ta dokument vključuje splošne zahteve in priporočila za načrtovanje novozgrajenih ploščadi ter za upravljanje in ocenjevanje strukturne celovitosti obstoječih ploščadi.
Ta dokument se ne uporablja za podvodne in dvižne sisteme ali cevovode.

General Information

Status
Published
Publication Date
09-Jul-2019
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
10-Jul-2019
Completion Date
10-Jul-2019

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SLOVENSKI STANDARD
SIST EN ISO 19900:2019
01-oktober-2019
Nadomešča:
SIST EN ISO 19900:2014
Industrija za predelavo nafte in zemeljskega plina - Splošne zahteve za vrtalne
ploščadi (ISO 19900:2019)

Petroleum and natural gas industries - General requirements for offshore structures (ISO

19900:2019)
Erdöl- und Erdgasindustrie - Allgemeine Anforderungen an Offshore-Bauwerke (ISO
19900:2019)

Industries du pétrole et du gaz naturel - Exigences générales relatives aux structures en

mer (ISO 19900:2019)
Ta slovenski standard je istoveten z: EN ISO 19900:2019
ICS:
75.180.10 Oprema za raziskovanje, Exploratory, drilling and
vrtanje in odkopavanje extraction equipment
SIST EN ISO 19900:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 19900:2019
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SIST EN ISO 19900:2019
EN ISO 19900
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2019
EUROPÄISCHE NORM
ICS 75.180.10 Supersedes EN ISO 19900:2013
English Version
Petroleum and natural gas industries - General
requirements for offshore structures (ISO 19900:2019)

Industries du pétrole et du gaz naturel - Exigences Erdöl- und Erdgasindustrie - Allgemeine

générales relatives aux structures en mer (ISO Anforderungen an Offshore-Bauwerke (ISO

19900:2019) 19900:2019)
This European Standard was approved by CEN on 9 June 2019.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 19900:2019 E

worldwide for CEN national Members.
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SIST EN ISO 19900:2019
EN ISO 19900:2019 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 19900:2019
EN ISO 19900:2019 (E)
European foreword

This document (EN ISO 19900:2019) 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 NEN.

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 January 2020, and conflicting national standards shall

be withdrawn at the latest by January 2020.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN ISO 19900:2013.

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, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
Endorsement notice

The text of ISO 19900:2019 has been approved by CEN as EN ISO 19900:2019 without any modification.

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SIST EN ISO 19900:2019
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SIST EN ISO 19900:2019
INTERNATIONAL ISO
STANDARD 19900
Third edition
2019-06
Petroleum and natural gas
industries — General requirements
for offshore structures
Industries du pétrole et du gaz naturel — Exigences générales
relatives aux structures en mer
Reference number
ISO 19900:2019(E)
ISO 2019
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SIST EN ISO 19900:2019
ISO 19900:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
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SIST EN ISO 19900:2019
ISO 19900:2019(E)
Contents Page

Foreword ..........................................................................................................................................................................................................................................v

Introduction ................................................................................................................................................................................................................................vi

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 2

4 Symbols and abbreviated terms ........................................................................................................................................................... 8

4.1 Symbols ......................................................................................................................................................................................................... 8

4.2 Abbreviated terms ............................................................................................................................................................................... 9

5 Fundamental requirements ...................................................................................................................................................................... 9

5.1 General ........................................................................................................................................................................................................... 9

5.2 Structural integrity requirements .......................................................................................................................................10

5.3 Functional requirements .............................................................................................................................................................10

5.4 Requirements for specific phases of the life of the structure ......................................................................11

5.4.1 Planning ................................................................................................................................................................................11

5.4.2 Construction and deployment ...........................................................................................................................11

5.4.3 Structural integrity management ...................................................................................................................11

5.4.4 Decommissioning and removal ........................................................................................................................11

5.5 Requirements for durability and robustness .............................................................................................................12

5.5.1 Durability, maintenance and inspection ...................................................................................................12

5.5.2 Robustness .........................................................................................................................................................................12

6 Basis for design/assessment ................................................................................................................................................................13

6.1 General ........................................................................................................................................................................................................13

6.2 Platform location and orientation .......................................................................................................................................13

6.3 Physical environmental conditions ....................................................................................................................................14

6.4 Geotechnical and geophysical conditions .....................................................................................................................14

6.4.1 Marine site investigations .....................................................................................................................................14

6.4.2 Seabed instability .........................................................................................................................................................15

6.4.3 Seabed disturbance ....................................................................................................................................................15

6.5 Specific design/assessment requirements ..................................................................................................................16

6.5.1 Topsides structures ....................................................................................................................................................16

6.5.2 Deck elevation .................................................................................................................................................................16

6.5.3 Splash zone ........................................................................................................................................................................17

6.5.4 Stationkeeping systems ..........................................................................................................................................17

6.5.5 Conductor and riser systems ..............................................................................................................................17

6.5.6 Foundations and anchoring .................................................................................................................................17

6.5.7 Additional operational requirements .........................................................................................................18

7 Development of design/assessment situations.................................................................................................................18

7.1 Hazards .......................................................................................................................................................................................................18

7.2 Hazardous events...............................................................................................................................................................................18

7.3 Exposure levels ....................................................................................................................................................................................19

7.3.1 General...................................................................................................................................................................................19

7.3.2 Exposure level L1 .........................................................................................................................................................20

7.3.3 Exposure level L2 .........................................................................................................................................................20

7.3.4 Exposure level L3 .........................................................................................................................................................20

7.4 Design/assessment situations ................................................................................................................................................21

7.4.1 General...................................................................................................................................................................................21

7.4.2 Operational design/assessment situations ...........................................................................................21

7.4.3 Extreme design/assessment situations ....................................................................................................22

7.4.4 Abnormal design/assessment situations ................................................................................................22

7.4.5 Accidental design/assessment situations ...............................................................................................23

7.4.6 Short duration design/assessment situations ....................................................................................23

7.4.7 Serviceability design/assessment situations .......................................................................................24

© ISO 2019 – All rights reserved iii
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SIST EN ISO 19900:2019
ISO 19900:2019(E)

8 Limit state verification ................................................................................................................................................................................24

8.1 General ........................................................................................................................................................................................................24

8.2 Basic variables and representative values ...................................................................................................................25

8.3 Limit states ..............................................................................................................................................................................................26

8.3.1 Categories of limit states ........................................................................................................................................26

8.3.2 Ultimate limit states ...................................................................................................................................................26

8.3.3 Abnormal/accidental limit states...................................................................................................................27

8.3.4 Serviceability limit states ......................................................................................................................................27

8.3.5 Fatigue limit states ......................................................................................................................................................27

8.4 Limit state verification procedure .......................................................................................................................................28

9 Actions ..........................................................................................................................................................................................................................28

9.1 Classifications of actions .............................................................................................................................................................28

9.2 Permanent actions and their representative values ............................................................................................29

9.3 Operational actions and their representative values ..........................................................................................29

9.4 Environmental actions and their representative values ..................................................................................30

9.5 Accidental actions and their representative values .............................................................................................31

9.6 Repetitive actions ..............................................................................................................................................................................31

10 Design values and partial factors .....................................................................................................................................................32

10.1 Design values of actions ...............................................................................................................................................................32

10.2 Actions acting in combination ................................................................................................................................................32

10.2.1 Principal and companion actions for the same action type .....................................................32

10.2.2 Principal and accompanying actions for specific design/assessment situations .33

10.3 Design values of resistance .......................................................................................................................................................33

10.3.1 General...................................................................................................................................................................................33

10.3.2 Design values of materials including soils ..............................................................................................33

10.3.3 Design values of geometric variables ..........................................................................................................34

10.3.4 Uncertainties in analysis models ....................................................................................................................34

10.4 Partial factors for operational and extreme design/assessment situations ...................................34

10.5 Partial factors for abnormal and accidental design/assessment situations ...................................34

10.6 Partial factors for serviceability design/assessment situations ...............................................................35

10.7 Partial factors for fatigue design/assessment verification ............................................................................35

10.8 Probabilistic modelling and analysis ................................................................................................................................35

11 Models and analysis .......................................................................................................................................................................................35

12 Quality management .....................................................................................................................................................................................36

12.1 General ........................................................................................................................................................................................................36

12.2 Installation inspection ...................................................................................................................................................................36

12.3 In-service inspection, maintenance and repair .......................................................................................................36

12.4 Records and documentation of design and construction ................................................................................37

12.4.1 General...................................................................................................................................................................................37

12.4.2 Calculations .......................................................................................................................................................................37

12.4.3 Weight and centre of gravity reports ..........................................................................................................38

12.4.4 Drawings and specifications ...............................................................................................................................38

13 Assessment of existing structures ...................................................................................................................................................38

13.1 General ........................................................................................................................................................................................................38

13.2 Condition assessment ....................................................................................................................................................................39

13.2.1 General...................................................................................................................................................................................39

13.2.2 Service and operating requirements ...........................................................................................................39

13.2.3 Environmental conditions ....................................................................................................................................39

13.2.4 Testing, inspection, maintenance and repair history ....................................................................39

13.3 Action assessment .............................................................................................................................................................................40

13.4 Resistance assessment ..................................................................................................................................................................40

13.5 Component and system failure consequences ..........................................................................................................40

13.6 Mitigation..................................................................................................................................................................................................40

Annex A (informative) Additional information and guidance ................................................................................................41

Bibliography .............................................................................................................................................................................................................................64

iv © ISO 2019 – All rights reserved
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SIST EN ISO 19900:2019
ISO 19900:2019(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.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).

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. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso

.org/iso/foreword .html.

This document 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.

This third edition cancels and replaces the second edition (ISO 19900:2013), which has been technically

revised. The main changes compared to the previous edition are as follows:
— Terms and definitions have been updated;

— Design/assessment situations are described, and the process for limit state design/assessment

verification has been clarified;

— Contents have been reorganized and many clarifications to provisions have been made;

— Annex A has been reorganized to mirror the numbering of the normative clauses and it has been

updated with substantial guidance moved from normative clauses.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/members .html.
© ISO 2019 – All rights reserved v
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SIST EN ISO 19900:2019
ISO 19900:2019(E)
Introduction

The International Standards on offshore structures prepared by TC 67/SC 7 (i.e. ISO 19900, the

ISO 19901 series, ISO 19902, ISO 19903, ISO 19904-1, the ISO 19905 series, ISO 19906) constitute a

common basis addressing design requirements and assessments of all types of offshore structures

used by the petroleum and natural gas industries worldwide.

NOTE These are sometimes referred to as the ISO 19900 series on offshore structures.

Through their application, the intention is to achieve adequate structural integrity and performance

based on reliability levels appropriate for manned and unmanned offshore structures, whatever the

nature or combination of the materials used.

Structural integrity is an overall concept comprising: models for describing actions, structural

analyses, design rules, safety elements, workmanship, quality management, and national requirements,

all of which are mutually dependent. The modification of any of these elements in isolation can cause an

imbalance or inconsistency, with possible impact on the reliability inherent in the offshore structure.

The implications involved in modifying one element, therefore, need to be considered in relation to all

the elements and the overall reliability of the offshore structure.

The International Standards on offshore structures prepared by TC 67/SC 7 are intended to provide

latitude in the choice of structural configurations, materials and techniques and to allow for innovative

solutions. Sound engineering judgement is, therefore,
...

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