EN ISO 13628-2:2006

Petroleum and natural gas industries - Design and operation of subsea production systems - Part 2: Unbonded flexible pipe systems for subsea and marine applications (ISO 13628-2:2006)

ISO 13628-2:2006 defines the technical requirements for safe, dimensionally and functionally interchangeable flexible pipes that are designed and manufactured to uniform standards and criteria. Minimum requirements are specified for the design, material selection, manufacture, testing, marking and packaging of flexible pipes, with reference to existing codes and standards where applicable.
ISO 13628-2:2006 applies to unbonded flexible pipe assemblies, consisting of segments of flexible pipe body with end fittings attached to both ends. ISO 13628-2:2006 applies to both static and dynamic flexible pipes used as flowlines, risers and jumpers. The applications addressed by this ISO 13628-2:2006 are sweet and sour service production, including export and injection applications for production products including oil, gas, water and injection chemicals.
ISO 13628-2:2006 does not cover flexible pipes of bonded structure or flexible pipe ancillary components or to flexible pipes for use in choke-and-kill line applications.
ISO 13628-2:2006 does not apply to flexible pipes that include non-metallic tensile armour wires.

Erdöl- und Erdgasindustrie - Auslegung und Betrieb von Unterwasser-Fördersystemen - Teil 2: Flexible Rohrleitungssysteme mit unverbundenen Auskleidungen für Unterwasser- und meerestechnische Anwendungen (ISO 13628-2:2006)

Industries du pétrole et du gaz naturel - Conception et exploitation des systèmes de production immergés - Partie 2: Systèmes de canalisations flexibles non collées pour applications sous-marines et en milieu marin (ISO 13628-2:2006)

L'ISO 13628-2:2006 définit les exigences techniques applicables à des canalisations flexibles, sûres, interchangeables du point de vue dimensionnel et fonctionnel, qui sont conçues et fabriquées selon des normes et des critères uniformes. Elle spécifie des exigences minimales relatives à la conception, au choix des matériaux, à la fabrication, aux essais, au marquage et au conditionnement des canalisations flexibles, en faisant référence, le cas échéant, à des codes et normes existants.
L'ISO 13628-2:2006 s'applique aux assemblages de canalisations flexibles non collées constitués de tronçons de corps de canalisations flexibles munis d'embouts fixés aux deux extrémités. L'ISO 13628-2:2006 ne concerne pas les canalisations flexibles à structure composite.
L'ISO 13628-2:2006 ne couvre pas les canalisations flexibles destinées à être utilisées dans les applications de lignes de duse.
L'ISO 13628-2:2006 ne couvre pas les canalisations flexibles comportant des armures de traction en fils non métalliques.

Industrija za predelavo nafte in zemeljskega plina - Načrtovanje in delovanje podvodnih proizvodnih sistemov - 2. del: Nepovezani gibki cevni sistemi za podvodno in pomorsko uporabo (ISO 13628-2:2006)

General Information

• Status: Published
• Publication Date: 14-Jul-2006
• Withdrawal Date: 30-Jan-2007
• ICS: 75.180.10 - Exploratory, drilling and extraction equipment
• Technical Committee: CEN/TC 12 - Materials, equipment and offshore structures for petroleum and natural gas industries
• Drafting Committee: CEN/TC 12 - Materials, equipment and offshore structures for petroleum and natural gas industries
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 15-Jul-2006
• Completion Date: 15-Jul-2006
• Ref Project: SIST EN ISO 13628-2:2007 - Petroleum and natural gas industries - Design and operation of subsea production systems - Part 2: Unbonded flexible pipe systems for subsea and marine applications (ISO 13628-2:2006)

Relations

• Replaces: EN ISO 13628-2:2000 - Petroleum and natural gas industries - Design and operation of subsea production systems - Part 2: Flexible pipe systems for subsea and marine applications (ISO 13628-2:2000)
• Effective Date: 22-Dec-2008
• Corrected By: EN ISO 13628-2:2006/AC:2009 - Petroleum and natural gas industries - Design and operation of subsea production systems - Part 2: Unbonded flexible pipe systems for subsea and marine applications (ISO 13628-2:2006/Cor 1:2009)
• Effective Date: 23-Mar-2009

Overview

EN ISO 13628-2:2006 - "Petroleum and natural gas industries - Design and operation of subsea production systems - Part 2: Unbonded flexible pipe systems for subsea and marine applications" is the CEN-adopted version of ISO 13628-2:2006. It defines minimum technical requirements to ensure safe, dimensionally and functionally interchangeable unbonded flexible pipe assemblies for subsea use. The standard covers design, material selection, manufacture, testing, marking and packaging, with references to existing codes where applicable.

Key topics and requirements

• Scope and exclusions
  • Applies to unbonded flexible pipe assemblies (pipe body segments with end fittings) used as flowlines, risers and jumpers, in both static and dynamic roles.
  • Covers sweet and sour service, including export and injection of oil, gas, water and injection chemicals.
  • Explicitly excludes bonded flexible pipe constructions, ancillary components, choke-and-kill line applications and pipes with non‑metallic tensile armour wires.
• Design requirements
  • Functional and system requirements, load and load-effect definitions, pipe structure and system design methodology.
  • Parameters for internal fluids, external environment and system interactions.
• Materials and qualification
  • Minimum material selection criteria, qualification testing and quality assurance for metallic and polymeric components.
• Manufacturing and QA
  • Manufacturing processes for carcass, polymer extrusions, pressure/tensile armour layers, anti‑wear/insulation layers and end fittings.
  • Requirements for manufacturing tolerances, repairs and special processes.
• Testing and documentation
  • Factory acceptance tests such as gauge checks, hydrostatic tests, electrical continuity/resistance and gas‑venting verification.
  • Required documentation: design reports, manufacturing quality plans, fabrication specifications, as‑built documentation and operation manuals.
• Marking & packaging
  • Identification, traceability and packaging rules to preserve integrity during transport and installation.

Applications and practical value

• Provides a uniform basis for specifying and procuring subsea flexible pipe systems used in oil & gas production, export and injection lines.
• Helps ensure interchangeability between manufacturers and operators, reducing procurement risk and installation errors.
• Guides engineers on design parameters, testing and inspection practices to improve reliability of subsea risers, flowlines and jumpers.
• Useful for specifying requirements for projects in corrosive (sour) environments and for systems that handle chemicals or multiphase fluids.

Who uses this standard

• Subsea equipment manufacturers and flexible pipe vendors
• Offshore and subsea engineering firms and design consultants
• Pipeline and riser designers, integrity and materials engineers
• Procurement specialists, inspection and quality assurance teams
• Regulatory bodies and operators specifying subsea production systems

Related standards

• ISO 13628 series: Parts 1, 3–11 (e.g., guidance on use of flexible pipes: ISO 13628-11) and parts under development (12, 13).
• References other international and industry codes where applicable (see normative references in the standard).

Keywords: EN ISO 13628-2:2006, unbonded flexible pipe, subsea flexible pipe systems, flexible risers, flowlines, subsea production, oil and gas, manufacturing requirements, factory acceptance tests.

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2007
1DGRPHãþD
SIST EN ISO 13628-2:2001
,QGXVWULMD]DSUHGHODYRQDIWHLQ]HPHOMVNHJDSOLQD1DþUWRYDQMHLQGHORYDQMH
SRGYRGQLKSURL]YRGQLKVLVWHPRYGHO1HSRYH]DQLJLENLFHYQLVLVWHPL]D
SRGYRGQRLQSRPRUVNRXSRUDER,62
Petroleum and natural gas industries - Design and operation of subsea production
systems - Part 2: Unbonded flexible pipe systems for subsea and marine applications
(ISO 13628-2:2006)
Erdöl- und Erdgasindustrie - Auslegung und Betrieb von Unterwasser-Fördersystemen -
Teil 2: Flexible Rohrleitungssysteme mit unverbundenen Auskleidungen für Unterwasser-
und meerestechnische Anwendungen (ISO 13628-2:2006)
Industries du pétrole et du gaz naturel - Conception et exploitation des systemes de
production immergés - Partie 2: Systemes de canalisations flexibles non collées pour
applications sous-marines et en milieu marin (ISO 13628-2:2006)
Ta slovenski standard je istoveten z: EN ISO 13628-2:2006
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 13628-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2006
ICS 75.180.10 Supersedes EN ISO 13628-2:2000
English Version
Petroleum and natural gas industries - Design and operation of
subsea production systems - Part 2: Unbonded flexible pipe
systems for subsea and marine applications (ISO 13628-2:2006)
Industries du pétrole et du gaz naturel - Conception et Erdöl- und Erdgasindustrie - Auslegung und Betrieb von
exploitation des systèmes de production immergés - Partie Unterwasser-Fördersystemen - Teil 2: Flexible
2: Systèmes de canalisations flexibles non collées pour Rohrleitungssysteme mit unverbundenen Auskleidungen für
applications sous-marines et en milieu marin (ISO 13628- Unterwasser- und meerestechnische Anwendungen (ISO
2:2006) 13628-2:2006)
This European Standard was approved by CEN on 14 July 2006.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, 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: rue de Stassart, 36  B-1050 Brussels
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13628-2:2006: E
worldwide for CEN national Members.

Foreword
This document (EN ISO 13628-2:2006) has been prepared by Technical Committee ISO/TC 67
"Materials, equipment and offshore structures for petroleum 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 January 2007, and conflicting national
standards shall be withdrawn at the latest by January 2007.

This document supersedes EN ISO 13628-2:2000.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
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.

Endorsement notice
The text of ISO 13628-2:2006 has been approved by CEN as EN ISO 13628-2:2006 without any
modifications.
INTERNATIONAL ISO
STANDARD 13628-2
Second edition
2006-07-15
Petroleum and natural gas industries —
Design and operation of subsea
production systems —
Part 2:
Unbonded flexible pipe systems for
subsea and marine applications
Industries du pétrole et du gaz naturel — Conception et exploitation des
systèmes de production immergés —
Partie 2: Systèmes de canalisations flexibles non collées pour
applications sous-marines et en milieu marin

Reference number
ISO 13628-2:2006(E)
©
ISO 2006
ISO 13628-2:2006(E)
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ii © ISO 2006 – All rights reserved

ISO 13628-2:2006(E)
Contents Page
Foreword. v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 4
4 Symbols and abbreviated terms . 9
5 Functional requirements. 9
5.1 General. 9
5.2 Overall requirements. 10
5.3 General design parameters . 10
5.4 Internal fluid parameters. 10
5.5 External environment . 12
5.6 System requirements . 13
6 Design requirements . 16
6.1 Loads and load effects. 16
6.2 Pipe design methodology . 17
6.3 Pipe structure design . 20
6.4 System design requirements. 25
7 Materials . 28
7.1 Material requirements. 28
7.2 Qualification requirements . 32
7.3 Quality assurance requirements . 39
8 Manufacturing requirements . 41
8.1 Quality assurance requirements . 41
8.2 Carcass . 43
8.3 Polymer extrusions. 43
8.4 Pressure and tensile armour layers. 45
8.5 Anti-wear and insulation layers. 45
8.6 End fitting . 46
8.7 Special processes. 47
8.8 Manufacturing tolerances . 49
8.9 Repairs. 49
9 Documentation. 50
9.1 General. 50
9.2 Design premise . 50
9.3 Design load report . 51
9.4 Design report. 51
9.5 Manufacturing quality plan . 52
9.6 Fabrication specification . 52
9.7 As-built documentation. 52
9.8 Operation manual . 53
10 Factory acceptance tests. 54
10.1 General. 54
10.2 Gauge test . 54
10.3 Hydrostatic pressure test . 54
10.4 Electrical continuity and resistance tests. 55
10.5 Gas-venting system test . 55
ISO 13628-2:2006(E)
11 Marking and packaging . 56
11.1 Marking. 56
11.2 Packaging . 56
Annex A (informative) Purchasing guidelines . 57
Annex B (informative) Bend stiffeners and bend restrictors . 64
Bibliography . 69

iv © ISO 2006 – All rights reserved

ISO 13628-2:2006(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 13628-2 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 13628-2:2000), 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
The following parts are under development:
⎯ Part 12 dealing with dynamic production risers
⎯ Part 13 dealing with remotely operated tools and interfaces on subsea production systems
ISO 13628-2:2006(E)
Introduction
This part of ISO 13628 is based on API Specification 17J, Specification for unbonded flexible pipe, Second
edition, November 1999, and the Amendment issued June 2002. This part of ISO 13628 has been technically
revised and updated to cater to the needs of the international oil and natural gas industries.
Users of this part of ISO 13628 should be aware that further or differing requirements might 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
may be particularly applicable where there is innovative or developing technology. Where an alternative is
offered, the vendor should identify any variations from this part of ISO 13628 and provide details.

vi © ISO 2006 – All rights reserved

INTERNATIONAL STANDARD ISO 13628-2:2006(E)

Petroleum and natural gas industries — Design and operation
of subsea production systems —
Part 2:
Unbonded flexible pipe systems for subsea and marine
applications
1 Scope
This part of ISO 13628 defines the technical requirements for safe, dimensionally and functionally
interchangeable flexible pipes that are designed and manufactured to uniform standards and criteria. Minimum
requirements are specified for the design, material selection, manufacture, testing, marking and packaging of
flexible pipes, with reference to existing codes and standards where applicable. See ISO 13628-11 for
guidelines on the use of flexible pipes and ancillary components.
This part of ISO 13628 applies to unbonded flexible pipe assemblies, consisting of segments of flexible pipe
body with end fittings attached to both ends. This part of ISO 13628 does not cover flexible pipes of bonded
structure. This part of ISO 13628 does not apply to flexible pipe ancillary components. Guidelines for bend
stiffeners and bend restrictors are given in Annex B.
NOTE 1 Guidelines for other components are given in ISO 13628-11.
This part of ISO 13628 does not apply to flexible pipes that include non-metallic tensile armour wires. Pipes of
such construction are considered as prototype products subject to qualification testing.
The applications addressed by this part of ISO 13628 are sweet and sour service production, including export
and injection applications. Production products include oil, gas, water and injection chemicals. This part of
ISO 13628 applies to both static and dynamic flexible pipes used as flowlines, risers and jumpers. This part of
ISO 13628 does not apply to flexible pipes for use in choke-and-kill line applications.
NOTE 2 See API Specification 16C for choke-and-kill line applications.
NOTE 3 ISO 13628-10 provides guidelines for bonded flexible pipe.
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 62, Plastics — Determination of water absorption
ISO 75-1, Plastics — Determination of temperature of deflection under load — Part 1: General test method
ISO 75-2, Plastics — Determination of temperature of deflection under load — Part 2: Plastics and ebonite
ISO 178, Plastics — Determination of flexural properties
ISO 179 (all parts), Plastics — Determination of Charpy impact properties
ISO 180, Plastics — Determination of Izod impact strength
ISO 306, Plastics — Thermoplastic materials — Determination of Vicat softening temperature (VST)
ISO 13628-2:2006(E)
ISO 307, Plastics — Polyamides — Determination of viscosity number
ISO 527-1, Plastics — Determination of tensile properties — Part 1: General principles
ISO 527-2, Plastics — Determination of tensile properties — Part 2: Test conditions for moulding and
extrusion plastics
ISO 604, Plastics — Determination of compressive properties
ISO 868, Plastics and ebonite — Determination of indentation hardness by means of a durometer (Shore
hardness)
ISO 899-1, Plastics — Determination of creep behaviour — Part 1: Tensile creep
ISO 974, Plastics — Determination of the brittleness temperature by impact
ISO 1183 (all parts), Plastics — Methods for determining the density of non-cellular plastics
ISO 3384, Rubber, vulcanized or thermoplastic — Determination of stress relaxation in compression at
ambient and at elevated temperatures
ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method
ISO 6507-1, Metallic materials — Vickers hardness test — Part 1: Test method
ISO 6508-1, Metallic materials — Rockwell hardness test — Part 1: Test method (scales A, B, C, D, E, F, G, H,
K, N, T)
ISO 8457-2, Steel wire rod — Part 2: Quality requirements for unalloyed steel wire rods for conversion to wire
ISO 8692, Water quality — Freshwater algal growth inhibition test with unicellular green algae
ISO 9352, Plastics — Determination of resistance to wear by abrasive wheels
ISO 10423:2003, Petroleum and natural gas industries — Drilling and production equipment — Wellhead and
christmas tree equipment
ISO 10474:1991, Steel and steel products — Inspection documents
ISO 11357-1, Plastics — Differential scanning calorimetry (DSC) — Part 1: General principles
ISO 11357-4, Plastics — Differential scanning calorimetry (DSC) — Part 4: Determination of specific heat
capacity
ISO 11359-2, Plastics — Thermomechanical analysis (TMA) — Part 2: Determination of coefficient of linear
thermal expansion and glass transition temperature
ISO 13628-4, Petroleum and natural gas industries — Design and operation of subsea production systems —
Part 4: Subsea wellhead and tree equipment
ISO 13847, Petroleum and natural gas industries — Pipeline transportation systems — Welding of pipelines
ISO 15156 (all parts), Petroleum and natural gas industries — Materials for use in H S-containing
environments in oil and gas production
1)
API Spec 16C, Specification for Choke and Kill Systems
2)
ASME Boiler and Pressure Vessel Code, Section IX, “Welding and Brazing Qualifications”
3)
ASTM A29, Standard Specification for Steel Bars, Carbon and Alloy, Hot-Wrought, General Requirements
for
1) American Petroleum Institute, 1220 L Street, N.W., Washington, D.C. 20005, USA
2) American Society of Mechanical Engineers, Three Park Avenue, New York, NY 10016-5990, USA
3) American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428, USA
2 © ISO 2006 – All rights reserved

ISO 13628-2:2006(E)
ASTM A182, Standard Specification for Forged or Rolled Alloy-Steel Pipe Flanges, Forged Fittings, and
Valves and Parts for High-Temperature Service
ASTM A388, Standard Practice for Ultrasonic Examination of Heavy Steel Forgings
ASTM A480, Standard Specification for General Requirements for Flat-Rolled Stainless and Heat-Resisting
Steel Plate, Sheet, and Strip
ASTM A668, Standard Specification for Steel Forgings, Carbon and Alloy, for General Industrial Use
ASTM A751, Standard Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products
ASTM C177, Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission
Properties by Means of the Guarded-Hot-Plate Apparatus
ASTM C518, Standard Test Method for Steady-State Thermal Transmission Properties by Means of the Heat
Flow Meter Apparatus
ASTM D695, Standard Test Method for Compressive Properties of Rigid Plastics
ASTM D789, Standard Test Methods for Determination of Relative Viscosity of Polyamide (PA)
ASTM D1238, Standard Test Method for Melt Flow Rates of Thermoplastics by Extrusion Plastometer
ASTM D1418, Standard Practice for Rubber and Rubber Latices — Nomenclature
ASTM D1505, Standard Test Method for Density of Plastics by the Density-Gradient Technique
ASTM D1693, Standard Test Method for Environmental Stress-Cracking of Ethylene Plastics
ASTM D5028, Standard Test Method for Curing Properties of Pultrusion Resins by Thermal Analysis
ASTM D6869, Standard Test Method for Coulometric and Volumetric Determination of Moisture in Plastics
Using the Karl Fischer Reaction (the Reaction of Iodine with Water)
ASTM E94, Standard Guide for Radiographic Examination
ASTM E165, Standard Test Method for Liquid Penetrant Examination
ASTM E384, Standard Test Method for Microindentation Hardness of Materials
ASTM E428, Standard Practice for Fabrication and Control of Steel Reference Blocks Used in Ultrasonic
Examination
ASTM E709, Standard Guide for Magnetic Particle Examination
ASTM E1356, Standard Test Method for Assignment of the Glass Transition Temperatures by Differential
Scanning Calorimetry
ASTM G48-03, Standard Test Methods for Pitting and Crevice Corrosion Resistance of Stainless Steels and
Related Alloys by Use of Ferric Chloride Solution
4)
DNV Fire Test, DNV Classification Note 6.1 Test (Fire Test)
5)
EN 287-1, Qualification test of welders — Fusion welding — Part 1: Steels
EN 288-1, Specification and approval of welding procedures for metallic materials Part 1: General rules for
fusion welding
4) Det Norske Veritas, Veritasveien 1, 1322 Høvik, Norway
5) European Committee for Standardization, CEN Management Centre, 36, rue de Stassart, B-1050, Brussels
ISO 13628-2:2006(E)
EN 288-2, Specification and approval of welding procedures for metallic materials Part 2: Welding procedure
specification for arc welding
EN 288-3, Specification and approval of welding procedures for metallic materials Part 3: Welding procedure
tests for the arc welding of steels
EN 10204:2004, Metallic products — Types of inspection documents
6)
Lloyds Fire Test, Lloyds Register of Shipping, Fire Testing — Memorandum ICE/Fire OSG 1000/499
7)
NACE TM 01-77, Laboratory Testing of Metals for Resistance to Sulfide Stress Cracking and Stress
Corrosion Cracking in H S Environments
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
ancillary components
components used to control the flexible pipe behaviour, such as bend stiffeners and buoyancy modules
3.2
annulus
space between the internal pressure sheath and outer sheath
NOTE Permeated gas and liquid is generally free to move and mix in the annulus.
3.3
anti-wear layer
non-metallic layer, either extruded thermoplastic sheath or tape wrapping, used to minimize wear between
structural layers
3.4
bellmouth
part of a guide tube, formed in the shape of a bellmouth, and designed to prevent overbending of the flexible
pipe
3.5
bend limiter
any device used to restrict bending of the flexible pipe
NOTE Bend limiters include bend restrictors, bend stiffeners, and bellmouths.
3.6
bend radius
radius of curvature of the flexible pipe measured from the pipe centreline
NOTE Storage and operating minimum bend radius (MBR) are defined in 6.3.1.
3.7
bend restrictor
mechanical device that functions as a mechanical stop and limits the local radius of curvature of the flexible
pipe to a minimum value
6) Lloyd's Register EMEA, 71 Fenchurch Street, London, EC3M 4BS, United Kingdom
7) NACE International, 1440 South Creek Drive, Houston, Texas 77084-4906 USA
4 © ISO 2006 – All rights reserved

ISO 13628-2:2006(E)
3.8
bend stiffener
ancillary conical shaped component, which locally supports the pipe to limit bending stresses and curvature of
the pipe to acceptance levels
NOTE Bend stiffeners can be either attached to an end fitting or a support structure where the flexible pipe passes
through the bend stiffener.
3.9
bending stiffness
ability of a flexible pipe to resist deflection when subjected to bending loads at constant tension, pressure and
temperature
3.10
bonded pipe
flexible pipe in which the steel reinforcement is integrated and bonded to a vulcanized elastomeric material
where textile material is included in the structure to obtain additional structural reinforcement or to separate
elastomeric layers
3.11
burst disk
weak points in the outer sheath designed to burst when the gas pressure in the annulus exceeds a specified
value
NOTE The weak point is induced by reducing the thickness of the sheath over a localized area.
3.12
carcass
interlocked metallic construction that can be used as the innermost layer to prevent, totally or partially,
collapse of the internal pressure sheath or pipe due to pipe decompression, external pressure, tensile armour
pressure, and mechanical crushing loads
NOTE The carcass may be used externally to protect the external surface of the pipe.
3.13
choke-and-kill line
flexible pipe jumper located between choke manifold and blow-out preventer
3.14
connector
device used to provide a leak-tight structural connection between the end fitting and adjacent piping
NOTE Connectors include bolted flanges, clamped hubs, and proprietary connectors. They may be designed for
diver-assisted makeup or for diverless operation using either mechanical or hydraulic apparatus.
3.15
crossover
flexible flowline crossing another pipe already laid on the seabed
NOTE The underlying pipe may be a steel pipe or another flexible pipe. It may be required to support the overlying
pipe to prevent overbending or crushing of the new or existing pipes.
3.16
design methodology verification report
evaluation report prepared by an independent verification agent at the time of an initial review, for a specific
manufacturer, confirming the suitability and appropriate limits on the manufacturer’s design methodologies
NOTE This report may include occasional amendments or revisions to address extensions beyond previous limits or
revisions of methodologies.
ISO 13628-2:2006(E)
3.17
design pressure
minimum or maximum pressure, inclusive of operating pressure, surge pressure including shut-in pressure
where applicable, vacuum conditions and static pressure head
3.18
dynamic application
flexible pipe configuration that is subjected to loads that vary in time, or whose deflections or boundary
conditions vary in time
3.19
end fitting
mechanical device which forms the transition between the flexible pipe body and the connector whose
different pipe layers are terminated in the end fitting in such a way as to transfer the load between the flexible
pipe and the connector
3.20
fishscaling
tendency of one tensile armour wire edge to lift off of the underlying layer because of deflection or incorrect
twist deformation during armour winding
3.21
flexible flowline
flexible pipe, wholly or in part, resting on the seafloor or buried below the seafloor, and used in a static
application
NOTE The term flowline is used in this document as a generic term for flexible flowlines.
3.22
flexible pipe
assembly of a pipe body and end fittings where the pipe body is composed of a composite of layered
materials that form a pressure-containing conduit and the pipe structure allows large deflections without a
significant increase in bending stresses
NOTE Normally the pipe body is built up as a composite structure composed of metallic and polymer layers.
The term “pipe” is used in this document as a generic term for flexible pipe.
3.23
flexible riser
flexible pipe connecting a platform/buoy/ship to a flowline, seafloor installation, or another platform where the
riser may be freely suspended (free, catenary), restrained to some extent (buoys, chains), totally restrained or
enclosed in a tube (I- or J-tubes)
3.24
independent verification agent
independent party or group, selected by the manufacturer, who can verify the indicated methodologies or
performance based on the technical literature, analyses, and test results and other information provided by the
manufacturer
NOTE The agent is also called upon to witness some measurements and tests related to material qualification.
3.25
insulation layer
additional layer added to the flexible pipe to increase the thermal insulation properties, usually located
between the outer tensile armour layer and the outer sheath
3.26
intermediate sheath
extruded polymer layer located between internal pressure and outer sheaths, which may be used as a barrier
to external fluids in smooth bore pipes or as an anti-wear layer
6 © ISO 2006 – All rights reserved

ISO 13628-2:2006(E)
3.27
internal pressure sheath
polymer layer that ensures internal-fluid integrity
NOTE This layer may consist of a number of sub-layers.
3.28
jumper
short flexible pipe used in subsea and topside, static, or dynamic applications
3.29
lay angle
angle between the axis of a spiral wound element (for example, armour wires) and a line parallel to the flexible
pipe longitudinal axis
3.30
outer sheath
polymer layer used to protect the pipe against penetration of seawater and other external environments,
corrosion, abrasion and mechanical damage, and to keep the tensile armours in position after forming
3.31
piggyback
two pipes attached at regular intervals with clamps, where either or both of the pipes can be flexible
3.32
pressure armour layer
structural layer with a lay angle close to 90°, that increases the resistance of the flexible pipe to internal and
external pressure and mechanical crushing loads; structurally supports the internal-pressure sheath; and
typically consists of an interlocked metallic construction, which may be backed up by a flat metallic spiral layer
3.33
quality
conformance to specified requirements
3.34
quality assurance
planned, systematic, and preventive actions that are required to ensure that materials, products, or services
meet specified requirements
3.35
quality control
inspection, test or examination to ensure that materials, products or services conform to specified
requirements
3.36
quality programme
established documented system to ensure quality
3.37
rough bore
flexible pipe with a carcass as the innermost layer
3.38
service life
period of time during which the flexible pipe fulfils all performance requirements
3.39
smooth bore
flexible pipe with an internal pressure sheath as the innermost layer
ISO 13628-2:2006(E)
3.40
sour service
service conditions at the design pressure with a H S content exceeding the minimum specified by
ISO 15156 (all parts)
3.41
static application
flexible pipes not exposed to significant cyclically varying loads or deflections during normal operations
3.42
sweet service
service conditions at the design pressure which have a H S content less than that specified by ISO 15156
(all parts)
3.43
tensile armour layer
structural layer with a lay angle typically between 20° and 55°, which consists of helically wound metallic wires,
and is used to sustain, totally or partially, tensile loads and internal pressure
NOTE Tensile armour layers are typically counter-wound in pairs.
3.44
torsional balance
pipe characteristic that is achieved by designing the structural layers in the pipe, such that axial and pressure
loads do not induce significant twist or torsional loads in the pipe
3.45
ultimate strength
maximum tensile stress that a material can withstand before rupture
3.46
unbonded flexible pipe
pipe construction consists of separate unbonded polymeric and metallic layers, which allows relative
movement between layers
3.47
visual examination
examination of parts and equipment for visible defects in material and workmanship
3.48
yield strength
stress level at which a metal or other material ceases to behave elastically
8 © ISO 2006 – All rights reserved

ISO 13628-2:2006(E)
4 Symbols and abbreviated terms
DSC differential scanning calorimetry
FAT factory acceptance test
GA general arrangement
HAZ heat-affected zone
HIC hydrogen-induced cracking
HV hardness on Vickers Scale
ID internal diameter
MBR minimum bend radius
NDE non-destructive examination
PA polyamide
PE polyethylene
PSL production specification level
PVC polyvinyl chloride
PVDF polyvinylidene fluoride
RAO response amplitude operator
SSC sulfide stress cracking
S-N curves showing stress range vs. number of cycles
TAN titrated acid number
TFL through-flowline
UNS Unified National Standard or Unified Numbering System
UV ultraviolet
material yield stress
σ
y
σ material ultimate stress
u
5 Functional requirements
5.1 General
5.1.1 The purchaser shall specify his functional requirements for the flexible pipe. The purchasing
guidelines in Annex A give a sample format for the specification of the functional requirements.
5.1.2 Functional requirements not specifically required by the purchaser and that can affect the design,
materials, manufacturing, and testing of the pipe shall be specified by the manufacturer.
ISO 13628-2:2006(E)
5.1.3 If the purchaser does not specify a requirement, and 5.1.2 does not apply, the manufacturer may
assume that there is no requirement.
5.2 Overall requirements
5.2.1 Flexible pipe
The minimum overall functional requirements of the flexible pipe that shall be demonstrated by the
manufacturer are as follows.
a) The pipe shall provide a leak-tight conduit.
b) The pipe shall be capable of withstanding all design loads and load combinations defined herein.
c) The pipe shall perform its function for the specified service life.
d) The flexible pipe materials shall be compatible with the environment to which the material is exposed.
e) The flexible pipe materials shall conform to the corrosion control requirements specified herein.
5.2.2 End fitting
The manufacturer shall demonstrate that the end fitting, as a minimum, meets the same functional
requirements as the flexible pipe. Where relevant, the following shall be demonstrated.
a) The end fitting shall provide a structural interface between the flexible pipe and the support structure.
b) The end fitting shall provide a structural interface between the flexible pipe and bend-limiting devices,
including bend stiffeners, bend restrictors and bellmouths, such that the bend-limiting devices meet their
functional requirements.
5.3 General design parameters
The purchaser shall specify any project-specific design requirements, including the requirements of 5.4 to 5.6
and the following:
a) nominal internal diameter;
b) length and tolerances of flexible pipe, including end fittings;
c) service life.
Purchasing guidelines are given in Annex A.
5.4 Internal fluid parameters
5.4.1 General
The purchaser shall specify the internal fluid parameters for the application. The parameters listed in Table 1
should be specified. When known, the minimum, normal and maximum conditions shall be specified for the
internal fluid parameters of Table 1. Expected variations in the internal fluid parameters over the service life
shall be specified.
10 © ISO 2006 – All rights reserved

ISO 13628-2:2006(E)
Table 1 — Internal fluid parameters
Parameter Comment
Internal pressure See 5.4.2
Temperature See 5.4.3
Fluid composition See 5.4.4
Service definition Sweet or sour in accordance with 5.4.4 a)
Fluid/flow description Fluid type and flow regime
Flow rate parameters Flow rates, fluid density, viscosity, minimum inlet pressure, and
required outlet pressure
Thermal parameters Fluid heat capacity
5.4.2 Internal pressure
5.4.2.1 The following internal pressures shall be specified:
a) maximum design pressure;
b) minimum design pressure.
5.4.2.2 The following internal pressures should be specified:
a) operating pressure or pressure profile through service life;
b) factory and field-test pressure requirements of governing and/or certifying authorities.
5.4.3 Temperature
5.4.3.1 The following temperatures shall be specified:
a) design minimum temperatures;
b) design maximum temperatures.
The operating temperature or temperature profiles through the service life should be specified.
5.4.3.2 The design minimum and maximum temperatures are the minimum and maximum temperatures
that can be experienced by the flexible pipe throughout the service life. These design temperatures may be
specified on the basis of the following minimum set of considerations:
a) operating temperatures;
b) upset temperatures (number and range of cycles);
c) gas-cooling effects (time/temperature curve);
d) fluid thermal characteristics;
e) flow characteristics;
f) storage, transport and installation conditions.
ISO 13628-2:2006(E)
5.4.4 Fluid composition
The purchaser should specify produced fluids (composition of individual phases), injected fluids and continual
and occasional chemical treatments (dosages, exposure times, concentrations, and frequency). In the
specification of the internal fluid composition, the following should be defined:
a) all parameters that define service conditions, including partial pressure of H S and CO , pH of aqueous
2 2
phase, TAN (in accordance with ASTM D664 or ASTM D974), and water content (produced water,
seawater, and free water);
b) gases, including oxygen, hydrogen, methane, and nitrogen;
c) liquids, including oil composition and alcohols;
d) aromatic components;
e) corrosive agents, including bacteria, chlorides, organic acids, and sulfur-bearing compounds;
f) injected chemical products including alcohols and inhibitors for corrosion, hydrate, paraffin, scale, and
wax;
g) solids, including sand, precipitates, scale, hydrates, wax, and biofilm.
5.5 External environment
The purchaser should specify the project external environmental parameters. The parameters listed in Table 2
should be considered. The design water depth shall be the maximum water depth to which the pipe section
may be exposed.
Table 2 — External environment parameters
Parameter Comment
Location Geographical data for the installation location
Water depth Design water depth, variations over pipe location and tidal variations
Seawater data Densi
...