EN ISO 19901-6:2009

SLOVENSKI STANDARD
01-februar-2010
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Petroleum and natural gas industries - Specific requirements for offshore structures -
Part 6: Marine operations (ISO 19901-6:2009)
Erdöl- und Erdgasindustrie - Spezifische Anforderungen für Offshore-Anlagen - Teil 6:
Mariner Betrieb (ISO 19901-6:2009)
Industries du pétrole et du gaz naturel - Exigences spécifiques relatives aux structures
en mer - Partie 6: Opérations marines (ISO 19901-6:2009)
Ta slovenski standard je istoveten z: EN ISO 19901-6:2009
ICS:
75.180.10 Oprema za raziskovanje in Exploratory and extraction
odkopavanje equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 19901-6
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2009
ICS 75.180.10
English Version
Petroleum and natural gas industries - Specific requirements for
offshore structures - Part 6: Marine operations (ISO 19901-
6:2009)
Industries du pétrole et du gaz naturel - Exigences Erdöl- und Erdgasindustrie - Spezielle Anforderungen für
spécifiques relatives aux structures en mer - Partie 6: Offshore-Anlagen - Teil 6: Mariner Betrieb (ISO 19901-
Opérations marines (ISO 19901-6:2009) 6:2009)
This European Standard was approved by CEN on 18 November 2009.

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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 19901-6:2009: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 19901-6:2009) has been prepared by Technical Committee ISO/TC 67 “Materials,
equipment and offshore structures for petroleum, petrochemical and natural gas industries” in collaboration
with Technical Committee CEN/TC 12 “Materials, equipment and offshore structures for petroleum,
petrochemical and natural gas industries” the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by June 2010, and conflicting national standards shall be withdrawn at
the latest by June 2010.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, 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 the United Kingdom.
Endorsement notice
The text of ISO 19901-6:2009 has been approved by CEN as a EN ISO 19901-6:2009 without any
modification.
INTERNATIONAL ISO
STANDARD 19901-6
First edition
2009-12-15
Petroleum and natural gas industries —
Specific requirements for offshore
structures —
Part 6:
Marine operations
Industries du pétrole et du gaz naturel — Exigences spécifiques
relatives aux structures en mer —
Partie 6: Opérations marines
Reference number
ISO 19901-6:2009(E)
©
ISO 2009
ISO 19901-6:2009(E)
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ii © ISO 2009 – All rights reserved

ISO 19901-6:2009(E)
Contents Page
Foreword .vii
Introduction.ix
1 Scope.1
2 Normative references.2
3 Terms and definitions .2
4 Symbols and abbreviated terms .15
4.1 Symbols.15
4.2 Abbreviated terms .18
5 General considerations.20
5.1 Introduction.20
5.2 Jurisdiction .21
5.3 HSE plan.22
5.4 Risk management.22
5.5 Job safety analysis.23
5.6 Environmental impact study .23
5.7 Manning, qualifications, job and safety training.23
5.8 Incident reporting .24
5.9 Personnel tracking .24
5.10 Approval by national authorities .24
6 Organization, documentation and planning .24
6.1 Introduction.24
6.2 Organization and communication .24
6.3 Quality assurance and administrative procedures.26
6.4 Technical procedures .26
6.5 Technical documentation .26
6.6 Certification and documentation .29
6.7 Systems and equipment .30
7 Metocean and earthquake requirements .32
7.1 Introduction.32
7.2 Weather-restricted/weather-unrestricted operations .33
7.3 Metocean conditions.33
7.4 Metocean criteria .35
7.5 Weather windows .36
7.6 Operational duration .37
7.7 Metocean forecast .37
7.8 Earthquake .38
8 Weight control .38
8.1 Introduction.38
8.2 Weight control classes .38
8.3 Contingencies for class A .39
8.4 Weight and CoG constraints .39
8.5 Weight control audits.39
8.6 Dimensional control .39
9 Stability.39
9.1 Introduction.39
9.2 General requirements .39
9.3 Stability calculations.40
ISO 19901-6:2009(E)
9.4 Intact stability.40
9.5 Damage stability .42
9.6 Single-barge transports .45
9.7 Multi-barge transports.45
9.8 Classed vessels .45
9.9 Self-floating structures .45
9.10 Loadout operations .47
9.11 Watertight integrity and temporary closures.48
9.12 Inclining tests.48
10 Ballasting operations .49
10.1 Introduction.49
10.2 Ballast system.50
10.3 Protection against damage and deterioration .51
10.4 Prevention of progressive flooding in damage condition.52
10.5 Control and indicating systems .52
10.6 Pumps .53
10.7 Valve arrangements.53
10.8 Vent systems.53
10.9 Air cushion system capacity .54
10.10 System testing .54
11 Loadout.54
11.1 Introduction.54
11.2 Categories of loadout.55
11.3 Structure being loaded.55
11.4 Site and quay.56
11.5 Barge.56
11.6 Link beams, skidways and skidshoes.56
11.7 Moorings.57
11.8 Grounded loadouts.57
11.9 Pumping and ballasting .58
11.10 Loadouts by trailers, SPMTs or hydraulic skidshoes.60
11.11 Propulsion system design, redundancy and back-up .60
11.12 Float-on onto submersible barges or vessels .62
11.13 Barge reinstatement and sea fastenings .63
11.14 Tugs .63
11.15 Management and organization.64
11.16 Loadout manual .64
12 Transportation.64
12.1 Introduction.64
12.2 General considerations.64
12.3 Towline pull required, fleet composition and towing arrangement.66
12.4 Tow out from dry dock .68
12.5 Inshore tow.70
12.6 Offshore tow.70
12.7 Transport by dry tow or onboard a heavy transport vessel.71
12.8 Transport manual.73
13 Temporary mooring and stationkeeping for marine operations.73
13.1 Introduction.73
13.2 Environmental criteria.74
13.3 Determination of mooring response.75
13.4 Sizing of mooring lines .76
13.5 Sizing of anchors.77
13.6 Sizing of attachments.77
13.7 Sizing of mooring line components.77
13.8 Clearances under extreme conditions .78
13.9 Tensioning of moorings.78
13.10 Other stationkeeping means .79
iv © ISO 2009 – All rights reserved

ISO 19901-6:2009(E)
14 Construction and outfitting afloat .79
14.1 Introduction.79
14.2 Structural strength and stresses .80
14.3 Construction spread .81
14.4 Welding.82
15 Float-over topsides installation .82
15.1 Introduction.82
15.2 Environmental considerations.82
15.3 Structural considerations.82
15.4 Clearances .83
15.5 Guidance systems for topsides set-down .84
15.6 Operational aspects .85
15.7 Float-over manual.87
16 Pre-laid mooring including foundation .87
16.1 Introduction.87
16.2 Installation planning.88
16.3 Fluke anchor installation .90
16.4 Plate anchor installation.91
16.5 Suction anchor installation .91
16.6 Anchor pile installation.93
16.7 Gravity anchor installation .94
16.8 Mooring system connectors .95
16.9 Chain.95
16.10 Steel wire rope .96
16.11 Synthetic fibre rope.97
16.12 TLP tendons.98
16.13 Mooring installation manual.99
17 Offshore installation operations .99
17.1 Introduction.99
17.2 Installation site .99
17.3 Actions on and motions of floating units .99
17.4 Systems and equipment .100
17.5 Launching.100
17.6 Float-off .102
17.7 Upending .103
17.8 Ballasting.104
17.9 Lifting and lowering by external means.104
17.10 Lowering by ballasting.105
17.11 Precise positioning on the sea floor by active and passive means.106
17.12 Skirt penetration .107
17.13 Underbase grouting .108
17.14 Piling.109
17.15 Attachment to pre-laid mooring system .111
17.16 Connection to a tendon system.112
17.17 Offshore completion .113
17.18 Installation manual .114
18 Lifting operations .114
18.1 Introduction.114
18.2 Rigging geometry .115
18.3 Actions and action effects.115
18.4 Strengths of slings, grommets and shackles.124
18.5 Design verifications .132
18.6 Lift point design.136
18.7 Clearances .137
18.8 Bumpers and guides .139
18.9 Heave compensated lifts .141
18.10 Lifts using DP .141
18.11 Practical considerations.141
ISO 19901-6:2009(E)
18.12 Lifting operation manual.142
19 Decommissioning and removal.143
19.1 Introduction.143
19.2 Removal planning.143
19.3 Preparation for removal .146
19.4 Removal .147
19.5 Transportation and disposal .149
19.6 Site clearance.149
Annex A (informative) Additional information and guidance .150
A.1 General.150
A.2 Guidance for 6.6.2: Required or recommended documentation .150
A.3 Guidance for 11.16: Loadout manual .152
A.4 Guidance for 12.8: Transport manual.154
A.5 Guidance for 17.18: Installation manual.155
A.6 Guidance for 18.8.4: Bumper and guide loads .156
Annex B (informative) Regional information .160
B.1 Introduction.160
B.2 Canada .160
Bibliography .164

vi © ISO 2009 – All rights reserved

ISO 19901-6:2009(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 19901-6 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 19901 consists of the following parts, under the general title Petroleum and natural gas industries —
Specific requirements for offshore structures:
⎯ Part 1: Metocean design and operating considerations
⎯ Part 2: Seismic design procedures and criteria
⎯ Part 4: Geotechnical and foundation design considerations
⎯ Part 5: Weight control during engineering and construction
⎯ Part 6: Marine operations
⎯ Part 7: Stationkeeping systems for floating offshore structures and mobile offshore units
The following part is under preparation:
⎯ Part 3: Topsides structure
ISO 19901 is one of a series of International Standards for offshore structures. The full series consists of the
following:
⎯ 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
⎯ ISO 19902, Petroleum and natural gas industries — Fixed steel offshore structures
⎯ ISO 19903, Petroleum and natural gas industries — Fixed concrete offshore structures
⎯ ISO 19904-1, Petroleum and natural gas industries — Floating offshore structures — Part 1: Monohulls,
semi-submersibles and spars
ISO 19901-6:2009(E)
⎯ ISO 19905-1, Petroleum and natural gas industries — Site-specific assessment of mobile offshore
1)
units — Part 1: Jack-ups
⎯ ISO/TR 19905-2, Petroleum and natural gas industries — Site-specific assessment of mobile offshore
1)
units — Part 2: Jack-ups commentary
1)
⎯ ISO 19906, Petroleum and natural gas industries — Arctic offshore structures

1) Under preparation.
viii © ISO 2009 – All rights reserved

ISO 19901-6:2009(E)
Introduction
The series of International Standards applicable to types of offshore structure, ISO 19900 to ISO 19906,
constitutes a common basis covering those aspects that address design requirements and assessments of all
offshore structures used by the petroleum, petrochemical and natural gas industries worldwide. Through their
application, the intention is to achieve reliability levels appropriate for manned and unmanned offshore
structures, whatever the type of structure and the nature or combination of materials used.
It is important to recognize that structural integrity is an overall concept comprising models for describing
actions, structural analysis, 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. It is
necessary, therefore, to consider the implications involved in modifications in relation to the overall reliability of
offshore structural systems.
The series of International Standards applicable to types of offshore structure is intended to provide a wide
latitude in the choice of structural configuration, material and techniques without hindering innovation. Sound
engineering judgment is, therefore, necessary in the use of these International Standards.
This part of ISO 19901 was developed to provide requirements and guidance for the planning, engineering
and safe execution of marine operations for all types of offshore structures except for drilling rigs, pipe-laying
barges and diving support vessels. Marine operations for offshore structures are parts of the construction,
transportation and installation phases when the structure is at risk from the marine environment. Marine
operations can extend to decommissioning, redeployment, removal, etc.
This part of ISO 19901 describes the principles of and provides requirements and guidance for marine
operations associated with fixed and floating offshore structures, from the point of view of planning,
engineering, implementation and documentation. Alternative requirements, methods and provisions can fulfil
the intention of this part of ISO 19901 and may be applied, provided it can be demonstrated that they achieve
at least the same level of confidence. The overall objective of this part of ISO 19901 is to ensure that marine
operations are conducted within defined and recognized safety/confidence levels, wherever they are
performed. Additional standards, codes and guidelines should also be taken into account, where applicable.
Special attention should be paid to national regulations governing the area in which the marine operations are
performed.
It is not the intent of this part of ISO 19901 to govern the design of structures, systems and components used
in marine operations, beyond the principles given. Recognized codes and standards are normally accepted as
the basis for the detailed design and the fabrication requirements of such components.
Annex A provides some background and some additional information to the main body of the document and it
is intended that it be read in conjunction with the main body of the document.
Annex B provides regional information on the application of the document to certain specific offshore areas.

INTERNATIONAL STANDARD ISO 19901-6:2009(E)

Petroleum and natural gas industries — Specific requirements
for offshore structures —
Part 6:
Marine operations
1 Scope
This part of ISO 19901 provides requirements and guidance for the planning and engineering of marine
operations, encompassing the design and analysis of the components, systems, equipment and procedures
required to perform marine operations, as well as the methods or procedures developed to carry them out
safely.
This part of ISO 19901 is applicable to marine operations for offshore structures including
⎯ steel and concrete gravity base structures (GBS);
⎯ piled steel structures and compliant towers;
⎯ tension leg platforms (TLP);
⎯ deep draught floaters (DDF), including spars or deep draught caisson vessels (DDCV);
⎯ floating production semi-submersibles (FPSS);
⎯ floating production, storage and offloading vessels (FPSO);
⎯ other types of floating production systems (FPS);
⎯ mobile offshore units (MOU);
⎯ topsides and components of any of the above;
⎯ subsea templates and similar structures;
⎯ gravity, piled, drag embedded and suction or other anchors;
⎯ tendon foundations;
⎯ associated mooring systems.
This document is also applicable to modifications of existing structures, e.g. installation of additional topsides
modules.
This part of ISO 19901 is not applicable to the following marine operations:
a) construction activities, e.g. in a fabrication yard onshore, where there is no exposure to the marine
environment;
b) drilling, processing and petrochemical activities;
c) routine marine activities during the service life of the structure;
d) drilling from mobile offshore drilling units (MODU);
ISO 19901-6:2009(E)
e) installation of pipelines, flowlines, risers and umbilicals;
f) diving.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 19900:2002, Petroleum and natural gas industries — General requirements for offshore structures
ISO 19901-1:2005, Petroleum and natural gas industries — Specific requirements for offshore structures —
Part 1: Metocean design and operating considerations
ISO 19901-4:2003, Petroleum and natural gas industries — Specific requirements for offshore structures —
Part 4: Geotechnical and foundation design considerations
ISO 19901-7:2005, Petroleum and natural gas industries — Specific requirements for offshore structures —
Part 7: Stationkeeping systems for floating offshore structures and mobile offshore units
ISO 15544, Petroleum and natural gas industries — Offshore production installations — Requirements and
guidelines for emergency response
ISO 17776, Petroleum and natural gas industries — Offshore production installations — Guidelines on tools
and techniques for hazard identification and risk asse
...