SIST EN ISO 13628-4:2011

SLOVENSKI STANDARD
SIST EN ISO 13628-4:2011
01-september-2011
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SIST EN ISO 13628-4:2000
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Petroleum and natural gas industries - Design and operation of subsea production
systems - Part 4: Subsea wellhead and tree equipment (ISO 13628-4:2010)
Erdöl- und Erdgasindustrie - Auslegung und Betrieb von Unterwasser-
Produktionssystemen - Teil 4: Bohrloch- und E-Kreuz-Ausrüstungen für den
Unterwassereinsatz (ISO 13628-4:2010)
Industries du pétrole et du gaz naturel - Conception et fonctionnement des systèmes de
production immergés - Partie 4: Equipements immergés de tête de puits et tête de
production (ISO 13628-4:2010)
Ta slovenski standard je istoveten z: EN ISO 13628-4:2010
ICS:
75.180.10 Oprema za raziskovanje in Exploratory and extraction
odkopavanje equipment
SIST EN ISO 13628-4:2011 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 13628-4:2011

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SIST EN ISO 13628-4:2011


EUROPEAN STANDARD
EN ISO 13628-4

NORME EUROPÉENNE

EUROPÄISCHE NORM
December 2010
ICS 75.180.10 Supersedes EN ISO 13628-4:1999
English Version
Petroleum and natural gas industries - Design and operation of
subsea production systems - Part 4: Subsea wellhead and tree
equipment (ISO 13628-4:2010)
Industries du pétrole et du gaz naturel - Conception et Erdöl- und Erdgasindustrie - Auslegung und Betrieb von
fonctionnement des systèmes de production immergés - Unterwasser-Produktionssystemen - Teil 4: Bohrloch- und
Partie 4: Équipements immergés de tête de puits et tête de E-Kreuz-Ausrüstungen für den Unterwassereinsatz (ISO
production (ISO 13628-4:2010) 13628-4:2010)
This European Standard was approved by CEN on 14 December 2010.

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, 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
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13628-4:2010: E
worldwide for CEN national Members.

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SIST EN ISO 13628-4:2011
EN ISO 13628-4:2010 (E)
Contents Page
Foreword .3

2

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SIST EN ISO 13628-4:2011
EN ISO 13628-4:2010 (E)
Foreword
This document (EN ISO 13628-4:2010) 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 2011, and conflicting national standards shall be withdrawn at
the latest by June 2011.
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.
This document supersedes EN ISO 13628-4:1999.
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, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 13628-4:2010 has been approved by CEN as a EN ISO 13628-4:2010 without any
modification.

3

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SIST EN ISO 13628-4:2011

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SIST EN ISO 13628-4:2011

INTERNATIONAL ISO
STANDARD 13628-4
Second edition
2010-12-15


Petroleum and natural gas industries —
Design and operation of subsea
production systems
Part 4:
Subsea wellhead and tree equipment
Industries du pétrole et du gaz naturel — Conception et exploitation des
systèmes de production immergés
Partie 4: Équipements immergés de tête de puits et tête de production





Reference number
ISO 13628-4:2010(E)
©
ISO 2010

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SIST EN ISO 13628-4:2011
ISO 13628-4:2010(E)
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ii © ISO 2010 – All rights reserved

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SIST EN ISO 13628-4:2011
ISO 13628-4:2010(E)
Contents Page
Foreword .v
Introduction.vi
1 Scope.1
2 Normative references.4
3 Terms, definitions, abbreviated terms and symbols .5
3.1 Terms and definitions .5
3.2 Abbreviated terms and symbols.10
4 Service conditions and production specification levels.12
4.1 Service conditions.12
4.2 Product specification levels.13
5 Common system requirements.13
5.1 Design and performance requirements .13
5.2 Materials .25
5.3 Welding.26
5.4 Quality control .27
5.5 Equipment marking.30
5.6 Storing and shipping.31
6 General design requirements for subsea trees and tubing hangers .32
6.1 General .32
6.2 Tree valving.34
6.3 Testing of subsea tree assemblies.42
6.4 Marking.47
6.5 Storing and shipping.47
7 Specific requirements — Subsea-tree-related equipment and sub assemblies.47
7.1 Flanged end and outlet connections.47
7.2 ISO clamp hub-type connections .65
7.3 Threaded connections .65
7.4 Other end connectors .65
7.5 Studs, nuts and bolting.66
7.6 Ring gaskets .66
7.7 Completion guidebase.67
7.8 Tree connectors and tubing heads.68
7.9 Tree stab/seal subs for vertical tree.72
7.10 Valves, valve blocks and actuators.73
7.11 TFL wye spool and diverter.86
7.12 Re-entry interface.87
7.13 Subsea tree cap.88
7.14 Tree-cap running tool.91
7.15 Tree-guide frame .93
7.16 Tree running tool.97
7.17 Tree piping .100
7.18 Flowline connector systems .102
7.19 Ancillary equipment running tools.105
7.20 Tree-mounted hydraulic/electric/optical control interfaces.107
7.21 Subsea chokes and actuators.110
7.22 Miscellaneous equipment.121
8 Specific requirements — Subsea wellhead .125
8.1 General .125
© ISO 2010 – All rights reserved iii

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SIST EN ISO 13628-4:2011
ISO 13628-4:2010(E)
8.2 Temporary guidebase . 126
8.3 Permanent guidebase . 127
8.4 Conductor housing. 131
8.5 Wellhead housing . 134
8.6 Casing hangers. 137
8.7 Annulus seal assemblies . 140
8.8 Casing hanger lockdown bushing . 141
8.9 Bore protectors and wear bushings . 142
8.10 Corrosion cap. 144
8.11 Running, retrieving and testing tools. 144
8.12 Trawl protective structure. 144
8.13 Wellhead inclination and orientation. 144
8.14 Submudline casing hanger and seal assemblies. 145
9 Specific requirements — Subsea tubing hanger system . 146
9.1 General. 146
9.2 Design . 146
9.3 Materials . 149
9.4 Testing . 149
10 Specific requirements — Mudline suspension equipment . 150
10.1 General. 150
10.2 Mudline suspension-landing/elevation ring. 154
10.3 Casing hangers. 155
10.4 Casing hanger running tools and tieback adapters. 156
10.5 Abandonment caps. 157
10.6 Mudline conversion equipment for subsea completions . 157
10.7 Tubing hanger system — Mudline conversion equipment for subsea completions. 158
11 Specific requirements — Drill-through mudline suspension equipment . 159
11.1 General. 159
11.2 External drill-through casing hangers (outside of the hybrid casing hanger housing). 159
11.3 Hybrid casing hanger housing. 159
11.4 Internal drill-through mudline casing hangers. 161
11.5 Annulus seal assemblies . 163
11.6 Bore protectors and wear bushings . 164
11.7 Tubing hanger system — Drill-through mudline equipment for subsea completions. 166
11.8 Abandonment caps. 166
11.9 Running, retrieving and testing tools. 166
Annex A (informative) Vertical subsea trees . 167
Annex B (informative) Horizontal subsea trees . 171
Annex C (informative) Subsea wellhead . 174
Annex D (informative) Subsea tubing hanger . 176
Annex E (normative) Mudline suspension and conversion systems . 180
Annex F (informative) Drill-through mudline suspension systems . 187
Annex G (informative) Assembly guidelines of ISO (API) bolted flanged connections. 189
Annex H (informative) Design and testing of subsea wellhead running, retrieving and testing tools. 199
Annex I (informative) Procedure for the application of a coating system. 202
Annex J (informative) Screening tests for material compatibility. 205
Annex K (informative) Design and testing of pad eyes for lifting . 210
Annex L (informative) Hyperbaric testing guidelines. 225
Annex M (informative) Purchasing guidelines . 227
Bibliography. 249

iv © ISO 2010 – All rights reserved

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SIST EN ISO 13628-4:2011
ISO 13628-4:2010(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 13628-4 was prepared by Technical Committee ISO/TC 67, Materials, equipment and offshore structures
for petroleum, petrochemical and natural gas industries, Subcommittee SC 4, Drilling and production
equipment.
This second edition cancels and replaces the first edition (ISO 13628-4:1999), which has been technically
revised.
ISO 13628 consists of the following parts, under the general title Petroleum and natural gas industries —
Design and operation of subsea production systems:
⎯ Part 1: General requirements and recommendations
⎯ Part 2: Unbonded flexible pipe systems for subsea and marine applications
⎯ Part 3: Through flowline (TFL) systems
⎯ Part 4: Subsea wellhead and tree equipment
⎯ Part 5: Subsea umbilicals
⎯ Part 6: Subsea production control systems
⎯ Part 7: Completion/workover riser systems
⎯ Part 8: Remotely Operated Vehicle (ROV) interfaces on subsea production systems
⎯ Part 9: Remotely Operated Tool (ROT) intervention systems
⎯ Part 10: Specification for bonded flexible pipe
⎯ Part 11: Flexible pipe systems for subsea and marine applications
A part 12, dealing with dynamic production risers, a part 14, dealing with High Integrity Pressure Protections
Systems (HIPPS), a part 15, dealing with subsea structures and manifolds, a part 16, dealing with
specifications for flexible pipe ancillary equipment, and a part 17, dealing with recommended practice for
flexible pipe ancillary equipment, are under development.
© ISO 2010 – All rights reserved v

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SIST EN ISO 13628-4:2011
ISO 13628-4:2010(E)
Introduction
This second edition of ISO 13628-4 has been updated by users and manufacturers of subsea wellheads and
trees. Particular attention was paid to making it an auditable standard. It is intended for worldwide application
in the petroleum industry. It is not intended to replace sound engineering judgement. It is necessary that users
of this part of ISO 13628 be aware that additional or different requirements can better suit the demands of a
particular service environment, the regulations of a jurisdictional authority or other scenarios not specifically
addressed.
A major effort in developing this second edition was a study of the risks and benefits of penetrations in subsea
wellheads. All previous editions of both this part of ISO 13628 and its parallel API document Specification for
Subsea Wellhead and Christmas Tree Equipment (Specification 17D) prohibited wellhead penetrations.
However, that prohibition was axiomatic. In developing this second edition, the workgroup used qualitative risk
analysis techniques and found that the original insight was correct: subsea wellheads with penetrations are
more than twice as likely to develop leaks over their life as those without penetrations.
The catalyst for examining this portion of the original editions of the API and ISO standards was the
phenomenon of casing pressure and its monitoring in subsea wells. The report generated by the
aforementioned risk analysis has become API 17 TR3 and API RP 90. The workgroup encourages the use of
these documents when developing designs and operating practices for subsea wells.
Care has also been taken to address the evolving issue of using external hydrostatic pressure in design. The
original versions of both API 17D and ISO 13628-4 were adopted at a time when the effects of that parameter
were relatively small. The industry’s move into greater water depths has prompted a consideration of that
aspect in this version of this part of ISO 13628. The high-level view is that it is not appropriate to use external
hydrostatic pressure to augment the applications for which a component can be used. For example, this part
of ISO 13628 does not allow the use of a subsea tree rated for 69 MPa (10 000 psi) installed in 2 438 m
(8 000 ft) of water on a well that has a shut-in tubing pressure greater than 69 MPa (10 000 psi). See 5.1.2.1.1
for further guidance.
The design considerations involved in using external hydrostatic pressure are only currently becoming fully
understood. If a user or fabricator desires to explore these possibilities, it is recommended that a thorough
review of the forthcoming American Petroleum Institute technical bulletin on the topic be carefully studied.
The overall objective of this part of ISO 13628 is to define clear and unambiguous requirements that facilitate
international standardization in order to enable safe and economic development of offshore oil and gas fields
by the use of subsea wellhead and tree equipment. It is written in a manner that allows the use of a wide
variety of technology, from well established to state-of-the-art. The contributors to this update do not wish to
restrict or deter the development of new technology. However, the user of this part of ISO 13628 is
encouraged to closely examine standard interfaces and the reuse of intervention systems and tools in the
interests of minimizing life-cycle costs and increasing reliability through the use of proven interfaces.
It is important that users of this part of ISO 13628 be aware that further or differing requirements can be
needed for individual applications. This part of ISO 13628 is not intended to inhibit a vendor from offering, or
the purchaser from accepting, alternative equipment or engineering solutions for the individual application.
This can be particularly applicable where there is innovative or developing technology. Where an alternative is
offered, it is the responsibility of the vendor to identify any variations from this part of ISO 13628 and provide
details.
vi © ISO 2010 – All rights reserved

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SIST EN ISO 13628-4:2011
INTERNATIONAL STANDARD ISO 13628-4:2010(E)

Petroleum and natural gas industries — Design and operation
of subsea production systems
Part 4:
Subsea wellhead and tree equipment
1 Scope
This part of ISO 13628 provides specifications for subsea wellheads, mudline wellheads, drill-through mudline
wellheads and both vertical and horizontal subsea trees. It specifies the associated tooling necessary to
handle, test and install the equipment. It also specifies the areas of design, material, welding, quality control
(including factory acceptance testing), marking, storing and shipping for both individual sub-assemblies (used
to build complete subsea tree assemblies) and complete subsea tree assemblies.
The user is responsible for ensuring subsea equipment meets any additional requirements of governmental
regulations for the country in which it is installed. This is outside the scope of this part of ISO 13628.
Where applicable, this part of ISO 13
...