Petroleum and natural gas industries - Arctic offshore structures (ISO 19906:2019)

This document specifies requirements and provides recommendations and guidance for the design, construction, transportation, installation and decommissioning of offshore structures related to the activities of the petroleum and natural gas industries in arctic and cold regions. Reference to arctic and cold regions in this document is deemed to include both the Arctic and other locations characterized by low ambient temperatures and the presence or possibility of sea ice, icebergs, icing conditions, persistent snow cover, and/or permafrost. The objective of this document is to ensure that complete structures, including substructures, topsides structures, floating production vessel hulls, foundations and mooring systems, in arctic and cold regions provide an appropriate level of reliability with respect to personnel safety, environmental protection and asset value. Value includes value to the owner, to the industry and to society in general. This document does not contain requirements for the operation, maintenance, service-life inspection or repair of arctic and cold region offshore structures, unless the design strategy imposes specific requirements such as ice management (IM) to reduce ice actions. Provisions for the operation, maintenance, service-life inspection and repair of mobile units are given in ISO 19905-1 and ISO 19905-3, supplemented by the provisions relating to ice actions and IM in this document. This document does not apply to mechanical, process and electrical equipment or any specialized process equipment associated with arctic and cold region offshore operations except in so far as it is necessary for the structure to sustain safely the actions imposed by the installation, housing and operation of such equipment. This document applies to equipment used for the positioning and disconnection of floating structures (see Clause 13).

Erdöl- und Erdgasindustrie - Offshore-Bauwerke für den Arktis-Bereich (ISO 19906:2019)

Industries du pétrole et du gaz naturel - Structures arctiques en mer (ISO 19906:2019)

Industrija nafte in zemeljskega plina - Naftne ploščadi za arktična območja (ISO 19906:2019)

Ta dokument določa zahteve ter podaja priporočila in smernice glede načrtovanja, transporta, namestitve in izločitve iz uporabe za naftne ploščadi v zvezi z dejavnostmi naftne industrije in industrije zemeljskega plina v arktičnih in hladnih območjih. Sklic na arktična in hladna območja v tem dokumentu vključuje Arktiko in druge lokacije, katerih značilnost so nizke temperature okolice ter prisotnost ali možnost nastanka ledu, ledenih gora, zaledenitve, trajne snežne odeje in/ali permafrosta. Cilj tega dokumenta je zagotoviti, da celotne strukture, vključno s podstrukturami, strukturami na palubi, plavajočimi proizvodnimi plovili, temelji in sistemi zasidranja, v arktičnih in hladnih območjih zagotavljajo ustrezno raven zanesljivosti v zvezi z osebno varnostjo, varstvom okolja in vrednostjo premoženja. Vrednost vključuje vrednost za lastnika, industrijo in družbo na splošno. Ta dokument ne vključuje zahtev za obratovanje, vzdrževanje, preglede in popravila med obratovanjem naftnih ploščadi v arktičnih in hladnih območjih, če strategija zasnove ne nalaga posebnih zahtev, kot je ravnanje v primeru ledu (IM) za zmanjšanje vplivov ledu. Določila glede obratovanja, vzdrževanja, pregledov in popravil med obratovanjem mobilnih enot so podana v standardih ISO 19905-1 in ISO 19905-3, dopolnjujejo pa jih določila v zvezi z vplivi ledu in ravnanjem v primeru ledu v tem dokumentu. Ta dokument se ne uporablja za mehansko, procesno in električno opremo ali nobeno specializirano procesno opremo, povezano z obratovanjem ploščadi v arktičnih in hladnih območjih, razen kolikor je to potrebno, da struktura varno vzdrži vse vplive zaradi namestitve, ohišja in obratovanja takšne opreme. Ta dokument se uporablja za opremo za pozicioniranje in odklop plavajočih struktur (glej točko 13).

General Information

Status
Published
Public Enquiry End Date
20-Nov-2017
Publication Date
10-Sep-2019
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
06-Sep-2019
Due Date
11-Nov-2019
Completion Date
11-Sep-2019

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SLOVENSKI STANDARD
SIST EN ISO 19906:2019
01-november-2019
Nadomešča:
SIST EN ISO 19906:2012
Industrija nafte in zemeljskega plina - Naftne ploščadi za arktična območja (ISO
19906:2019)

Petroleum and natural gas industries - Arctic offshore structures (ISO 19906:2019)

Erdöl- und Erdgasindustrie - Offshore-Bauwerke für den Arktis-Bereich (ISO 19906:2019)

Industries du pétrole et du gaz naturel - Structures arctiques en mer (ISO 19906:2019)

Ta slovenski standard je istoveten z: EN ISO 19906:2019
ICS:
75.180.10 Oprema za raziskovanje, Exploratory, drilling and
vrtanje in odkopavanje extraction equipment
SIST EN ISO 19906:2019 en,fr,de

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

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SIST EN ISO 19906:2019
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SIST EN ISO 19906:2019
EN ISO 19906
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2019
EUROPÄISCHE NORM
ICS 75.180.10 Supersedes EN ISO 19906:2010
English Version
Petroleum and natural gas industries - Arctic offshore
structures (ISO 19906:2019)

Industries du pétrole et du gaz naturel - Structures Erdöl- und Erdgasindustrie - Offshore-Bauwerke für

arctiques en mer (ISO 19906:2019) den Arktis-Bereich (ISO 19906:2019)
This European Standard was approved by CEN on 21 April 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 19906:2019 E

worldwide for CEN national Members.
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SIST EN ISO 19906:2019
EN ISO 19906:2019 (E)
Contents Page

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

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SIST EN ISO 19906:2019
EN ISO 19906:2019 (E)
European foreword

This document (EN ISO 19906:2019) 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 February 2020, and conflicting national standards

shall be withdrawn at the latest by February 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 19906:2010.

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 19906:2019 has been approved by CEN as EN ISO 19906:2019 without any modification.

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SIST EN ISO 19906:2019
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SIST EN ISO 19906:2019
INTERNATIONAL ISO
STANDARD 19906
Second edition
2019-07
Petroleum and natural gas
industries — Arctic offshore
structures
Industries du pétrole et du gaz naturel — Structures arctiques en mer
Reference number
ISO 19906:2019(E)
ISO 2019
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SIST EN ISO 19906:2019
ISO 19906:2019(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 19906:2019
ISO 19906:2019(E)
Contents Page

Foreword ............................................................................................................................................................... x

Introduction ........................................................................................................................................................ xi

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

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

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

4 Symbols and abbreviated terms .................................................................................................. 10

4.1 Symbols ........................................................................................................................................................ 10

4.2 Abbreviated terms ................................................................................................................................... 10

5 General requirements and conditions ...................................................................................... 12

5.1 Fundamental requirements ................................................................................................................. 12

5.2 Design methods ........................................................................................................................................ 12

5.3 Site-specific considerations ................................................................................................................. 13

5.4 Construction, transportation and installation ............................................................................. 15

5.5 Operational measures ............................................................................................................................ 16

5.6 Environmental protection .................................................................................................................... 16

5.7 Serviceability requirements including vibration ........................................................................ 17

5.8 Decommissioning and reclamation .................................................................................................. 17

6 Physical environmental conditions ........................................................................................... 17

6.1 General ......................................................................................................................................................... 17

6.1.1 Physical environment requirements ................................................................................ 17

6.1.2 Physical environmental data monitoring programmes ............................................ 18

6.2 Daylight hours ........................................................................................................................................... 18

6.3 Meteorology ............................................................................................................................................... 18

6.3.1 Air temperature ......................................................................................................................... 18

6.3.2 Wind ............................................................................................................................................... 19

6.3.3 Wind chill ..................................................................................................................................... 19

6.3.4 Snow ............................................................................................................................................... 19

6.3.5 Ice accretion ................................................................................................................................ 19

6.3.6 Visibility ........................................................................................................................................ 20

6.3.7 Polar lows ..................................................................................................................................... 20

6.4 Oceanography ............................................................................................................................................ 20

6.4.1 Water depth ................................................................................................................................ 20

6.4.2 Waves ............................................................................................................................................. 20

6.4.3 Ocean currents ........................................................................................................................... 20

6.4.4 Other oceanographic factors ................................................................................................ 21

6.5 Sea ice and icebergs ................................................................................................................................ 21

6.5.1 General .......................................................................................................................................... 21

6.5.2 Ice types ........................................................................................................................................ 22

6.5.3 Ice morphology .......................................................................................................................... 22

6.5.4 Ice movement ............................................................................................................................. 22

6.5.5 Ice properties ............................................................................................................................. 23

6.5.6 Ice monitoring ............................................................................................................................ 23

6.6 Seabed considerations ........................................................................................................................... 23

6.6.1 Earthquakes ................................................................................................................................ 23

6.6.2 Permafrost ................................................................................................................................... 23

6.6.3 Ice gouge ....................................................................................................................................... 23

6.6.4 Strudel scours ............................................................................................................................. 23

7 Reliability and limit states design .............................................................................................. 24

7.1 Design philosophy ................................................................................................................................... 24

7.1.1 Governing principles ............................................................................................................... 24

7.1.2 Life-safety categories .............................................................................................................. 24

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SIST EN ISO 19906:2019
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7.1.3 Consequence categories ......................................................................................................... 24

7.1.4 Exposure levels .......................................................................................................................... 25

7.1.5 Safety and reliability ................................................................................................................ 25

7.1.6 Limit states .................................................................................................................................. 25

7.1.7 Alternative design methods ................................................................................................. 25

7.2 Limit states design method .................................................................................................................. 26

7.2.1 Limit states .................................................................................................................................. 26

7.2.2 Actions ........................................................................................................................................... 28

7.2.3 Principal and companion environmental actions ....................................................... 29

7.2.4 Combinations of actions and partial action factors .................................................... 31

8 Events and actions ............................................................................................................................ 33

8.1 General ......................................................................................................................................................... 33

8.2 Ice events and actions ............................................................................................................................ 33

8.2.1 General principles for calculating ice actions ............................................................... 33

8.2.2 Representative values of ice actions ................................................................................. 34

8.2.3 Ice events and design situations ......................................................................................... 34

8.2.4 Global ice actions ...................................................................................................................... 35

8.2.5 Local ice actions......................................................................................................................... 37

8.2.6 Dynamic ice actions ................................................................................................................. 37

8.2.7 Operational measures to reduce ice actions .................................................................. 38

8.2.8 Physical and mechanical properties of ice ..................................................................... 38

8.3 Metocean related actions ...................................................................................................................... 39

8.3.1 Metocean actions on structures .......................................................................................... 39

8.3.2 Wave-induced velocity of ice features ............................................................................. 41

8.4 Seismic actions .......................................................................................................................................... 41

8.4.1 General .......................................................................................................................................... 41

8.4.2 Companion seismic actions .................................................................................................. 42

8.4.3 Companion ice actions ............................................................................................................ 42

8.4.4 Factors influencing seismic actions and effects ........................................................... 42

8.4.5 Seismic isolation and damping systems .......................................................................... 42

9 Foundation design ............................................................................................................................ 42

9.1 General ......................................................................................................................................................... 42

9.2 Geotechnical data acquisition and identification of hazards ................................................. 43

9.2.1 General .......................................................................................................................................... 43

9.2.2 Marine soil investigations ..................................................................................................... 44

9.2.3 Bathymetry survey ................................................................................................................... 44

9.2.4 Geophysical survey .................................................................................................................. 44

9.3 Representative values of soil properties ........................................................................................ 44

9.4 Design considerations ............................................................................................................................ 45

9.4.1 General .......................................................................................................................................... 45

9.4.2 Action factors .............................................................................................................................. 46

9.4.3 Material and resistance factors ........................................................................................... 46

9.4.4 Dynamic action effect analysis ............................................................................................ 46

9.4.5 Ultimate limit states ................................................................................................................. 46

9.4.6 Serviceability limit states ...................................................................................................... 47

9.4.7 Fatigue limit states ................................................................................................................... 47

9.4.8 Abnormal limit states .............................................................................................................. 47

9.4.9 Construction and installation .............................................................................................. 47

9.5 Gravity-based structures ...................................................................................................................... 48

9.5.1 Arctic considerations for foundation design ................................................................. 48

9.5.2 Installation and removal ........................................................................................................ 48

9.6 Piled structures ......................................................................................................................................... 49

9.7 Design of anchors for floating systems ........................................................................................... 49

9.7.1 General .......................................................................................................................................... 49

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SIST EN ISO 19906:2019
ISO 19906:2019(E)

9.7.2 Drag anchors ............................................................................................................................... 49

9.7.3 Suction anchors ......................................................................................................................... 50

9.7.4 Piled anchors .............................................................................................................................. 51

9.7.5 Removal ........................................................................................................................................ 51

9.8 Scour ........................................................................................................................................................ 51

9.9 Inspection and performance monitoring ................................................................................. 51

9.10 Seismic analysis ................................................................................................................................... 52

10 Man-made islands ............................................................................................................................. 52

10.1 General .................................................................................................................................................... 52

10.2 Island types ........................................................................................................................................... 52

10.3 Design considerations ...................................................................................................................... 53

10.3.1 General design considerations ............................................................................................ 53

10.3.2 Considerations for man-made islands ............................................................................. 54

10.3.3 Design for ice .............................................................................................................................. 55

10.3.4 Geotechnical considerations ................................................................................................ 56

10.3.5 Coastal engineering ................................................................................................................. 58

10.3.6 Slope protection ........................................................................................................................ 59

10.4 Seismic design ...................................................................................................................................... 60

10.5 Construction ......................................................................................................................................... 61

10.5.1 Operational requirements .................................................................................................... 61

10.5.2 Fill quality control .................................................................................................................... 61

10.5.3 Armour rock quality control ................................................................................................ 62

10.6 Monitoring and maintenance ........................................................................................................ 62

10.6.1 General .......................................................................................................................................... 62

10.6.2 Monitoring of the physical environment ........................................................................ 62

10.6.3 Structural monitoring ............................................................................................................. 63

10.6.4 Slope and slope-protection monitoring .......................................................................... 63

10.6.5 Maintenance ............................................................................................................................... 63

10.7 Decommissioning and reclamation ............................................................................................. 63

11 Fixed steel structures ...................................................................................................................... 64

11.1 General .................................................................................................................................................... 64

11.2 General design requirements ........................................................................................................ 64

11.2.1 Plastic design .............................................................................................................................. 64

11.2.2 Resistance factors .................................................................................................................... 64

11.2.3 Fracture control ........................................................................................................................ 64

11.2.4 Temperature effects ................................................................................................................ 65

11.2.5 Damage due to freezing water ............................................................................................ 65

11.3 Structural modelling and analysis ............................................................................................... 65

11.3.1 General .......................................................................................................................................... 65

11.3.2 Interactions ................................................................................................................................. 65

11.3.3 Dynamic analysis ...................................................................................................................... 65

11.4 Strength of tubular members and joints ................................................................................... 65

11.5 Strength of stiffened-plate panels................................................................................................ 66

11.6 Strength of steel-concrete composite walls ............................................................................. 66

11.6.1 General .......................................................................................................................................... 66

11.6.2 Analysis methods ..................................................................................................................... 67

11.6.3 Material properties .................................................................................................................. 67

11.6.4 Design for out-of-plane actions .......................................................................................... 67

11.6.5 Design for in-plane actions ................................................................................................... 68

11.7 Seismic design ...................................................................................................................................... 69

11.7.1 Framed structures ................................................................................................................... 69

11.7.2 Stiffened-plate structures ..................................................................................................... 69

11.8 Fatigue ..................................................................................................................................................... 69

11.9 Materials, testing and NDT ..............................................................................

...

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