SIST EN ISO 13628-15:2011

Petroleum and natural gas industries - Design and operation of subsea production systems - Part 15: Subsea structures and manifolds (ISO 13628-15:2011)

This part of ISO 13628 addresses recommendations for subsea structures and manifolds, within the frameworks set forth by recognized and accepted industry specifications and standards. As such, it does not supersede or eliminate any requirement imposed by any other industry specification. This part of ISO 13628 covers subsea manifolds and templates utilized for pressure control in both subsea production of oil and gas, and subsea injection services. See Figure 1 for an example of such a subsea system. Equipment within the scope of this part of ISO 13628 is listed below: a) the following structural components and piping systems of subsea production systems: - production and injection manifolds, - modular and integrated single satellite and multiwell templates, - subsea processing and subsea boosting stations, - flowline riser bases and export riser bases (FRB, ERB), - pipeline end manifolds (PLEM), - pipeline end terminations (PLET), - T- and Y-connection, - subsea isolation valve (SSIV); b) the following structural components of subsea production system: - subsea controls and distribution structures, - other subsea structures; c) protection structures associated with the above. The following components and their applications are outside the scope of this part of ISO 13628: - pipeline and manifold valves; - flowline and tie-in connectors; - choke valves; - production control systems.

Erdöl- und Erdgasindustrie - Auslegung und Betrieb von Unterwasser-Produktionssystemen - Teil 15: Unterwasser-Aufbauten und Verteilerstücke (ISO 13628-15:2011)

Industries du pétrole et du gaz naturel - Conception et exploitation des systèmes de production immergés - Partie 15: Structures et manifolds immergés (ISO 13628-15:2011)

L'ISO 13628-15:2011 traite des recommandations relatives aux structures immergées et aux manifolds, dans les cadres définis par des spécifications et normes industrielles reconnues et acceptées. A ce titre, elle ne remplace et n'annule aucune exigence imposée par toute autre spécification industrielle.
L'ISO 13628-15:2011 couvre les manifolds et templates (châssis de guidage) immergés utilisés pour le contrôle de la pression aussi bien dans la production sous-marine de pétrole et de gaz, que pour les services d'injection sous-marine.
Les équipements relevant du domaine d'application de l'ISO 13628-15:2011 sont énumérés ci-dessous:
les éléments de structure et réseaux de canalisations suivants des systèmes de production sous-marine:
manifolds de production et d'injection,
structures modulaires et intégrées pour puits satellites isolés et pour plusieurs puits,
stations de traitement et stations auxiliaires immergées,
bases de risers (colonnes montantes) pour conduites d'écoulement et d'export (FRB, ERB),
manifolds en extrémité de pipeline (PLEM),
terminaisons en extrémité de pipeline (PLET),
connexions en T et en Y,
vanne d'isolement immergée (SSIV);
les éléments de structure suivants d'un système de production sous-marine:
structures immergées de commande et de distribution et autres structures immergées, et
les structures de protection associées aux éléments susmentionnés.
L'ISO 13628-15:2011 ne s'applique pas aux vannes de pipeline et de manifold, aux connecteurs de conduites d'écoulement et de raccordement, aux duses et aux systèmes de contrôle de la production.

Industrija za predelavo nafte in zemeljskega plina - Načrtovanje in delovanje podvodnih proizvodnih sistemov - 15. del: Podmorske strukture in razdelilniki (ISO 13628-15:2011)

Ta del standarda ISO 13628 se ukvarja s priporočili za podmorske strukture in razdelilnike v okvirih, določenih v priznanih in sprejetih industrijskih specifikacijah in standardih. Kot tak ne nadomešča niti odpravlja nobene zahteve, ki jih predpisuje katera koli druga industrijska specifikacija. Ta del standarda ISO 13628 zajema podmorske razdelilnike in predloge, ki se uporabljajo za nadzor tlaka v podmorski proizvodnji nafte in zemeljskega plina ter podmorskih injekcijskih storitvah. Glej sliko 1 za primer takega podmorskega sistema. Oprema s področja, ki ga zajema ta del ISO 13628, je navedena spodaj: a) naslednji strukturni sestavni deli in cevni sistemi podmorskih proizvodnih sistemov: - proizvodni in injekcijski razdelilniki; - modularne in integrirane enosatelitske predloge ter predloge z več vrtinami; - podmorska obdelava in podmorske tlačne postaje; - postaje z dvižno cevjo na tokovnici in izvozne postaje z dvižno cevjo (FRB, ERB); - končni razdelilniki cevovodov (PLEM); - zaključki cevovodov (PLET); - T-in Y-priključki; - podmorski izolacijski ventil (SSIV); b) naslednji strukturni sestavni deli podmorskega proizvodnega sistema: - objekti za podmorski nadzor in distribucijo; - drugi podmorski objekti; c) zaščitne strukture, povezane z zgoraj navedenim. Naslednji sestavni deli in njihova uporaba niso v okviru tega dela ISO 13628: - ventili cevovoda in razdelilnika; - priključki tokovnice in povezave; - dušilni ventili; - sistemi za nadzor proizvodnje.

General Information

• Status: Published
• Public Enquiry End Date: 04-Feb-2010
• Publication Date: 13-Oct-2011
• ICS: 75.180.10 - Exploratory, drilling and extraction equipment
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 30-Sep-2011
• Due Date: 05-Dec-2011
• Completion Date: 14-Oct-2011
• Ref Project: EN ISO 13628-15:2011 - Petroleum and natural gas industries - Design and operation of subsea production systems - Part 15: Subsea structures and manifolds (ISO 13628-15:2011)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 13628-15:2011
01-november-2011
,QGXVWULMD]DSUHGHODYRQDIWHLQ]HPHOMVNHJDSOLQD1DþUWRYDQMHLQGHORYDQMH
SRGYRGQLKSURL]YRGQLKVLVWHPRYGHO3RGPRUVNHVWUXNWXUHLQUD]GHOLOQLNL,62

Petroleum and natural gas industries - Design and operation of subsea production
systems - Part 15: Subsea structures and manifolds (ISO 13628-15:2011)
Erdöl- und Erdgasindustrie - Auslegung und Betrieb von Unterwasser-
Produktionssystemen - Teil 15: Unterwasser-Aufbauten und Verteilerstücke (ISO 13628-
15:2011)
Industries du pétrole et du gaz naturel - Conception et exploitation des systèmes de
production immergés - Partie 15: Structures et manifolds immergés (ISO 13628-15:2011)
Ta slovenski standard je istoveten z: EN ISO 13628-15:2011
ICS:
75.180.10 Oprema za raziskovanje in Exploratory and extraction
odkopavanje equipment
SIST EN ISO 13628-15:2011 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 13628-15:2011

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SIST EN ISO 13628-15:2011


EUROPEAN STANDARD
EN ISO 13628-15

NORME EUROPÉENNE

EUROPÄISCHE NORM
September 2011
ICS 75.180.10
English Version
Petroleum and natural gas industries - Design and operation of
subsea production systems - Part 15: Subsea structures and
manifolds (ISO 13628-15:2011)
Industries du pétrole et du gaz naturel - Conception et Erdöl- und Erdgasindustrie - Auslegung und Betrieb von
exploitation des systèmes de production immergés - Partie Unterwasser-Produktionssystemen - Teil 15: Unterwasser-
15: Structures immergées et manifolds (ISO 13628- Aufbauten und Verteilerstücke (ISO 13628-15:2011)
15:2011)
This European Standard was approved by CEN on 13 August 2011.

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
© 2011 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13628-15:2011: E
worldwide for CEN national Members.

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SIST EN ISO 13628-15:2011
EN ISO 13628-15:2011 (E)
Contents Page
Foreword .3

2

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SIST EN ISO 13628-15:2011
EN ISO 13628-15:2011 (E)
Foreword
This document (EN ISO 13628-15:2011) 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 March 2012, and conflicting national standards shall be withdrawn at
the latest by March 2012.
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, 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 13628-15:2011 has been approved by CEN as a EN ISO 13628-15:2011 without any
modification.

3

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SIST EN ISO 13628-15:2011

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SIST EN ISO 13628-15:2011

INTERNATIONAL ISO
STANDARD 13628-15
First edition
2011-09-15

Petroleum and natural gas industries —
Design and operation of subsea
production systems —
Part 15:
Subsea structures and manifolds
Industries du pétrole et du gaz naturel — Conception et exploitation des
systèmes de production immergés —
Partie 15: Structures immergées et manifolds




Reference number
ISO 13628-15:2011(E)
©
ISO 2011

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SIST EN ISO 13628-15:2011
ISO 13628-15:2011(E)

COPYRIGHT PROTECTED DOCUMENT


©  ISO 2011
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56  CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Published in Switzerland

ii © ISO 2011 – All rights reserved

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SIST EN ISO 13628-15:2011
ISO 13628-15:2011(E)
Contents Page
Foreword . v
1  Scope . 1
2  Normative references . 3
3  Terms, abbreviated terms, and definitions . 4
3.1  Terms and definitions . 4
3.2  Abbreviated terms . 7
4  Manifold and template functional considerations . 9
4.1  General . 9
4.2  System requirements . 10
4.3  System Interfaces . 12
4.4  Cluster manifold requirements . 13
4.5  Template system requirements . 13
5  Design considerations . 14
5.1  System design . 14
5.2  Loads . 17
5.3  Piping design . 18
5.4  Structural design . 19
5.5  Foundation design . 22
5.6  Components . 25
6  Verification and validation of design . 26
6.1  Design verification . 26
6.2  Design validation . 28
6.3  Other comments . 30
7  Materials and fabrication requirements to piping systems . 30
7.1  General . 30
7.2  Pipe and pipe fittings . 31
7.3  Forged components . 32
7.4  Chemical composition and weldability . 32
7.5  Test sampling of base materials . 33
7.6  Mechanical and corrosion testing of base materials . 33
7.7  Non-destructive inspection of components . 35
7.8  Fastener materials . 37
7.9  Bending and forming operations . 37
7.10  Overlay welding and buttering of components . 39
7.11  Welding and non-destructive testing of piping systems . 40
8  Fabrication and manufacturing considerations . 49
8.1  External corrosion protection . 49
8.2  Colours . 49
8.3  Material traceability . 49
9  Installation, operation and maintenance considerations . 50
9.1  Installation requirements . 50
9.2  Operations requirements . 50
9.3  Maintenance considerations . 51
9.4  Requirements during installation . 52
10  ROV/ROT aspects . 55
11  Lifting considerations . 56
11.1  Pad eyes . 56
© ISO 2011 – All rights reserved iii

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SIST EN ISO 13628-15:2011
ISO 13628-15:2011(E)
11.2  Other lifting devices .56
12  Equipment marking .56
13  Transportation and storage .57
13.1  General .57
13.2  Storage and preservation procedure .57
13.3  Sea-fastening .57
14  Abandonment provisions .57
14.1  General .57
14.2  Decommissioning .57
14.3  Design .58
14.4  Post-abandonment operation .58
14.5  Structures .58
14.6  Manifolds .58
14.7  Templates .58
Annex A (informative) Typical manifold data sheet .59
Bibliography .61

iv © ISO 2011 – All rights reserved

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SIST EN ISO 13628-15:2011
ISO 13628-15:2011(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 13628-15 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.
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 tools and 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
 Part 15: Subsea structures and manifolds
A Part 12, dealing with dynamic production risers, a Part 14, dealing with high-integrity pressure protection
systems (HIPPS), a Part 16, dealing with specification for flexible pipe ancillary equipment, and a Part 17,
dealing with recommended practice for flexible pipe ancillary equipment, are under preparation.

© ISO 2011 – All rights reserved v

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SIST EN ISO 13628-15:2011

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SIST EN ISO 13628-15:2011
INTERNATIONAL STANDARD ISO 13628-15:2011(E)

Petroleum and natural gas industries — Design and operation
of subsea production systems —
Part 15:
Subsea structures and manifolds
1 Scope
This part of ISO 13628 addresses recommendations for subsea structures and manifolds, within the
frameworks set forth by recognized and accepted industry specifications and standards. As such, it does not
supersede or eliminate any requirement imposed by any other industry specification.
This part of ISO 13628 covers subsea manifolds and templates utilized for pressure control in both subsea
production of oil and gas, and subsea injection services. See Figure 1 for an example of such a subsea
system.
Equipment within the scope of this part of ISO 13628 is listed below:
a) the following structural components and piping systems of subsea production systems:
 production and injection manifolds,
 modular and integrated single satellite and multiwell templates,
 subsea processing and subsea boosting stations,
 flowline riser bases and export riser bases (FRB, ERB),
 pipeline end manifolds (PLEM),
 pipeline end terminations (PLET),
 T- and Y-connection,
 subsea isolation valve (SSIV);
b) the following structural components of subsea production system:
 subsea controls and distribution structures,
 other subsea structures;
c) protection structures associated with the above.
© ISO 2011 – All rights reserved 1

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SIST EN ISO 13628-15:2011
ISO 13628-15:2011(E)
The following components and their applications are outside the scope of this part of ISO 13628:
 pipeline and manifold valves;
 flowline and tie-in connectors;
 choke valves;
 production control systems.
NOTE General information regarding these topics can be found in additional publications, such as ISO 13628-1 and
API Spec 2C.

Key
A tree
B cluster manifold
C PLEM
D PLET
E inline tee
F multi-phase pump skid
Figure 1 — Example of some typical subsea structures
2 © ISO 2011 – All rights reserved

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SIST EN ISO 13628-15:2011
ISO 13628-15:2011(E)
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 3183, Petroleum and natural gas industries — Steel pipe for pipeline transportation systems
ISO 3834-2, Quality requirements for fusion welding of metallic materials — Part 2: Comprehensive quality
requirements
ISO 9606 (all parts), Qualification test of welders — Fusion welding
ISO 9712, Non-destructive testing — Qualification and certification of NDT personnel — General principles
ISO 10423, Petroleum and natural gas industries — Drilling and production equipment — Wellhead and
christmas tree equipment
ISO 10474, Steel and steel products — Inspection documents
ISO 13628-1:2005, Petroleum and natural gas industries — Design and operation of subsea production
systems — Part 1: General requirements and recommendations
ISO 13628-1:2005/Amd 1:2010, Petroleum and natural gas industries — Design and operation of subsea
production systems — Part 1: General requirements and recommendations — Amendment 1: Revised
Clause 6
ISO 13628-4, Petroleum and natural gas industries — Design and operation of subsea production systems —
Part 4: Subsea wellhead and tree equipment
ISO 13628-8, Petroleum and natural gas industries — Design and operation of subsea production systems —
Part 8: Remotely operated tools and interfaces on subsea production systems
ISO 14731:2006, Welding coordination — Tasks and responsibilities
ISO 15156 (all parts), Petroleum and natural gas industries — Materials for use in H S-containing
2
environments in oil and gas production
ISO 15590-1, Petroleum and natural gas industries — Induction bends, fittings and flanges for pipeline
transportation systems — Part 1: Induction bends
ISO 15609 (all parts), Specification and qualification of welding procedures for metallic materials — Welding
procedure specification
ISO 15614 (all parts), Specification and qualification of welding procedures for metallic materials — Welding
procedure test
EN 473, Non-destructive testing — Qualification and certification of NDT personnel — General principles
EN 1418, Welding personnel — Approval testing of welding operators for fusion welding and resistance weld
setters for fully mechanized and automatic welding of metallic materials
EN 10228-3, Non-destructive testing of steel forgings — Part 3: Ultrasonic testing of ferritic or martensitic steel
forgings
ASME B31.3, Process Piping
ASME V, 2007, Boiler and Pressure Vessel Code (BPVC), Section V, Nondestructive Examination
© ISO 2011 – All rights reserved 3

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SIST EN ISO 13628-15:2011
ISO 13628-15:2011(E)
ASME VIII, 2007, Boiler and Pressure Vessel Code (BPVC), Section VIII, Rules for Construction of Pressure
Vessels, Div. 1
ASME IX, Boiler and Pressure Vessel Code (BPVC), Section IX, Welding and Brazing Qualifications
ASNT SNT-TC-1A, Recommended Practice No. SNT-TC-1A, Personnel qualification and certification in
nondestructive testing
ASTM A388, Standard Practice for Ultrasonic Examination of Steel Forgings
ASTM E562, Standard Test Method for Determining Volume Fraction by Systematic Manual Point Count
ASTM G48, Standard Test Methods for Pitting and Crevice Corrosion Resistance of Stainless Steels and
Related Alloys by Use of Ferric Chloride Solution
NS 477, Welding — Rules for qualification of welding inspectors
3 Terms, abbreviated terms, and definitions
For the purposes of this document, the following terms, abbreviated terms and definitions apply.
3.1 Terms and definitions
3.1.1
carbon steel
full range of carbon, carbon-manganese and low-alloy steels used in the construction of conventional oilfield
equipment
3.1.2
corrosion-resistant alloy
CRA
alloy that is intended to be resistant to general and localized corrosion in oilfield environments that are
corrosive to carbon steels
NOTE This definition is in accordance with ISO 15156 (all parts) and is intended to include materials such as
stainless steels and nickel base alloys. Other ISO documents can have other definitions.
3.1.3
driven pile
jetted pile
typically a tall steel cylindrical structure, with or without internal stiffener system, used to support subsea
structures
NOTE Driven piles are usually driven into the sea-floor with impact hammers, while jetted piles rely on jetting the soil
at the lower end of the pile.
3.1.4
inline tee
system of piping and valves used to make a subsea connection at the middle of a pipeline, and generally
integral to the pipeline
NOTE The pipeline may be used to transport produced fluids or to distribute injected fluids.
3.1.5
low-alloy steel
steel containing at least 1 % and less than 5 % of elements deliberately added for the purpose of modifying
properties
4 © ISO 2011 – All rights reserved

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SIST EN ISO 13628-15:2011
ISO 13628-15:2011(E)
3.1.6
manifold
system of headers, branched piping and valves used to gather produced fluids or to distribute injected fluids in
subsea oil and gas production systems
NOTE A manifold system can also provide for well testing and well servicing. The associated equipment can include
valves, connectors for pipeline and tree interfaces, chokes for flow control and TFL diverters. The manifold system can
also include control system equipment, such as a distribution system for hydraulic and electrical functions, as well as
providing interface connections to control modules. All or part of the manifold can be integral with the template or can be
installed separately at a later date if desired. Manifold headers can include lines for water or chemical injection, gas lift and
well control.
3.1.6.1
cluster manifold
structure used to support a manifold for produced or injected fluids
NOTE There are no wells on a cluster manifold.
3.1.7
mudmat
typically a shallow structure used to support a subsea structure by distributing the load to the seabed via a
structural plate or shallow skirt
3.1.8
pipeline end manifold
PLEM
system of headers, piping and valves used to gather produced fluids or to distribute injected fluids in subsea
production systems, generally integral to the pipeline and having more than one subsea connection
3.1.9
pipeline end termination
PLET
system of piping and valves, generally integral to the pipeline, used to make a subsea connection at the end
of a pipeline
NOTE 1 Typically, a PLET has only one subsea connection.
NOTE 2 The pipeline can be used to transport produced fluids or to distribute injected fluids.
3.1.10
pitting resistance equivalent number
PREN
index that exists in several variations and usually based on observed resistance to pitting of corrosion-
resistant alloys in the presence of chlorides and oxygen, e.g. as found in seawater
NOTE Though useful, these indices are not directly indicative of the resistance to produced oil and gas environments.
The most common examples are given in Equations (1) and (2):
f  w  3,3w  16w (1)
PREN Cr Mo N
f  w  3,3(w  0,5w )  16w (2)
PREN Cr Mo W N
where
w is the mass fraction of chromium in the alloy, expressed as a percentage of the total composition;
Cr
w is the mass fraction of molybdenum in the alloy, expressed as a percentage of the total composition;
Mo
w is the mass fraction of tungsten in the alloy, expressed as a percentage of the total composition;
W
w is the mass fraction of nitrogen in the alloy, expressed as a percentage of the total composition.
N
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SIST EN ISO 13628-15:2011
ISO 13628-15:2011(E)
3.1.11
protection structure
independent structure that protects subsea equipment against damage from dropped objects, fishing gear and
other relevant accidental loads
3.1.12
riser base
structure that supports a marine production riser or loading terminal, and that serves as a structure through
which to react to loads on the riser throughout its service life
NOTE A riser base can also include a pipeline connection capability.
3.1.13
sealine
subsea flowline
3.1.14
sour service
service in H S-containing fluids
2
NOTE In this part of ISO 13628, “sour service” refers to conditions where the H S content is such that restrictions as
2
specified in ISO 15156 (all parts) or NACE MR 0175 apply.
3.1.15
suction pile
typically a tall steel cylindrical structure, open
...