EN ISO 27913:2025
(Main)Carbon dioxide capture, transportation and geological storage - Pipeline transportation systems (ISO 27913:2024, Corrected version 2025-09)
Carbon dioxide capture, transportation and geological storage - Pipeline transportation systems (ISO 27913:2024, Corrected version 2025-09)
This document specifies the requirements and recommendations for the transportation of CO2 streams from the capture site to the storage facility where it is primarily stored in a geological formation or used for other purposes (e.g. for enhanced oil recovery or CO2 use).
This document applies to the transportation of CO2 streams by
— rigid metallic pipelines,
— pipeline systems,
— onshore and offshore pipelines for the transportation of CO2 streams,
— conversion of existing pipelines for the transportation of CO2 streams, and
— transportation of CO2 streams in the gaseous and dense phases.
This document also includes aspects of CO2 stream quality assurance, as well as converging CO2 streams from different sources.
Health, safety and environment aspects specific to CO2 transport and monitoring are also considered in this document.
Transportation of CO2 via ship, rail or on road is not covered in this document.
Abscheidung, Transport und geologische Speicherung von Kohlenstoffdioxid - Rohrleitungstransportsysteme (ISO 27913:2024, korrigierte Fassung 2025-09)
Captage, transport et stockage géologique du dioxyde de carbone - Systèmes de transport par conduites (ISO 27913:2024, Version corrigée 2025-09)
Le présent document spécifie des exigences et des recommandations sur les conduites, applicables au transport de flux de CO2 du site de captage jusqu’à l’installation de stockage où il est principalement stocké dans des formations géologiques ou utilisé à d’autres fins (par exemple, pour une récupération assistée des hydrocarbures ou une utilisation du CO2).
Le présent document s’applique au transport de flux de CO2 par:
— conduites métalliques rigides;
— réseaux de conduites;
— conduites terrestres et en mer destinées au transport de flux de CO2;
— conversion de conduites existantes pour le transport de flux de CO2; et
— transport de flux de CO2 en phase gazeuse et en phase dense.
Le présent document inclut également des aspects d’assurance qualité du flux de CO2 et traite de la convergence de flux de CO2 provenant de différentes sources.
Les aspects liés à la santé, la sécurité et l’environnement spécifiques à la surveillance et au transport du CO2 sont également pris en compte dans le présent document.
Le transport du CO2 par voie maritime, ferroviaire ou routière n’est pas traité dans le présent document.
Zajetje, transport in geološko shranjevanje ogljikovega dioksida - Transportni cevovodni sistemi (ISO 27913:2024)
Ta dokument določa zahteve in priporočila za transport tokov CO2 z mesta zajetja do skladišča, v katerem se shranjuje predvsem v geološki formaciji ali uporablja za druge namene (npr. za izboljšano pridobivanje nafte ali uporabo CO2). Ta dokument se uporablja za transport tokov CO2: – po togih kovinskih cevovodih; – po cevovodnih sistemih; – po kopenskih in morskih cevovodih za transport tokov CO2; – s predelavo obstoječih cevovodov za transport tokov CO2; ter – s transportom tokov CO2 v plinastem in gostem stanju. Ta dokument vključuje tudi vidike zagotavljanja kakovosti tokov CO2 ter združevanje tokov CO2 iz različnih virov. V tem dokumentu so obravnavani tudi zdravstveni, varnostni in okoljski vidiki, značilni za transport in nadzor CO2. Ta dokument ne zajema transporta CO2 z ladjo, po železnici ali cesti.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2025
Zajetje, transport in geološko shranjevanje ogljikovega dioksida - Transportni
cevovodni sistemi (ISO 27913:2024)
Carbon dioxide capture, transportation and geological storage - Pipeline transportation
systems (ISO 27913:2024)
Abscheidung, Transport und geologische Speicherung von Kohlenstoffdioxid -
Rohrleitungstransportsysteme (ISO 27913:2024)
Captage, transport et stockage géologique du dioxyde de carbone - Systèmes de
transport par conduites (ISO 27913:2024)
Ta slovenski standard je istoveten z: EN ISO 27913:2025
ICS:
13.020.40 Onesnaževanje, nadzor nad Pollution, pollution control
onesnaževanjem in and conservation
ohranjanje
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 27913
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2025
EUROPÄISCHE NORM
ICS 13.020.40
English Version
Carbon dioxide capture, transportation and geological
storage - Pipeline transportation systems (ISO
27913:2024)
Captage, transport et stockage géologique du dioxyde Abscheidung, Transport und geologische Speicherung
de carbone - Systèmes de transport par conduites (ISO von Kohlenstoffdioxid - Rohrleitungstransportsysteme
27913:2024) (ISO 27913:2024)
This European Standard was approved by CEN on 9 June 2025.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 27913:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
The text of ISO 27913:2024 has been prepared by Technical Committee ISO/TC 265 "Carbon dioxide
capture, transportation, and geological storage” of the International Organization for Standardization
(ISO) and has been taken over as EN ISO 27913:2025 by Technical Committee CEN/TC 474 “Carbon
dioxide Capture, transportation, Utilisation, and Storage (CCUS)” the secretariat of which is held by
NEN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by December 2025, and conflicting national standards
shall be withdrawn at the latest by December 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 27913:2024 has been approved by CEN as EN ISO 27913:2025 without any modification.
International
Standard
ISO 27913
Second edition
Carbon dioxide capture,
2024-10
transportation and
geological storage — Pipeline
transportation systems
Captage, transport et stockage géologique du dioxyde de
carbone — Systèmes de transport par conduites
Reference number
ISO 27913:2024(en) © ISO 2024
ISO 27913:2024(en)
© ISO 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
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Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 27913:2024(en)
Contents Page
Foreword .vi
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms. 5
4.1 Symbols .5
4.2 Abbreviated terms .5
5 Properties of CO , CO streams and the mixing of CO streams that influence pipeline
2 2 2
transportation . 6
5.1 General .6
5.2 Pure CO .6
5.2.1 Thermodynamics .6
5.2.2 Chemical reactions and corrosion .6
5.3 CO streams .7
5.3.1 Thermodynamics .7
5.3.2 Chemical reactions .7
6 Concept development and design criteria . 7
6.1 General .7
6.2 Safety philosophy .7
6.3 Reliability and availability of CO stream pipeline systems .8
6.4 Short-term storage reserve .8
6.5 Access to the pipeline system . .8
6.6 System design principles .9
6.6.1 General .9
6.6.2 CO stream specification .9
6.6.3 Pressure control and protection system .10
6.7 General principles to avoid internal pipeline corrosion .10
6.7.1 Particular aspects related to CO streams .10
6.7.2 Maximum water content .10
6.7.3 Avoidance of hydrate formation .10
6.7.4 Measurement of water content in the CO stream .11
6.8 Flow assurance .11
6.8.1 General .11
6.8.2 Operation under single-phase flow conditions during normal operation .11
6.8.3 Pipeline operation under multi-phase flow conditions during transient
operations . . 12
6.8.4 Planned and unscheduled pipeline pressure release . 12
6.8.5 Reduced flow capacity. 13
6.8.6 Available transport capacity . 13
6.8.7 Flow coating . 13
6.8.8 External thermal insulation .14
6.8.9 Leak detection .14
6.8.10 Fugitive emissions .14
6.8.11 Impurities .14
6.9 Pipeline layout.14
6.9.1 Vent stations .14
6.9.2 Block valve stations . 15
6.9.3 Pumping and compressor stations . 15
6.9.4 In-line inspection . 15
6.9.5 Onshore vent facility design . . 15
6.9.6 Offshore vent facilities .16
iii
ISO 27913:2024(en)
7 Materials and pipeline design .16
7.1 General .16
7.2 Internal corrosion .16
7.3 Pipeline system materials .17
7.3.1 Steel selection .17
7.3.2 External coating .17
7.3.3 Non-metallic materials .17
7.3.4 Lubricants .17
8 Wall thickness calculations .18
8.1 Calculation principles .18
8.1.1 Design loads .18
8.1.2 Minimum wall thickness .18
8.1.3 Minimum wall thickness against internal pressure .18
8.1.4 Minimum wall thickness against dynamic pressure alterations . .18
8.1.5 Minimum wall thickness, t , against running ductile fracture for gas phase
minDF
pipelines .19
8.1.6 Minimum wall thickness, t , against running ductile fracture for dense
minDF
phase pipelines.19
8.1.7 Fracture toughness .19
8.1.8 Overview of the different aspects of wall thickness determination .19
8.2 Additional measures . 22
8.2.1 Dynamic loads due to operation (alternating operation pressure) . 22
8.2.2 Topographical profile . 22
8.2.3 Fracture arrestors . 22
8.2.4 Offshore pipelines . 22
9 Construction .22
9.1 General . 22
9.2 Pipeline pre-commissioning . 23
9.2.1 Overview . 23
9.2.2 Pipeline dewatering and drying . 23
9.2.3 Preservation before pipeline commissioning . 23
10 Operation .23
10.1 General . 23
10.2 Pipeline commissioning . 23
10.2.1 Initial filling and pressurization with product . 23
10.2.2 Initial or baseline inspection . .24
10.3 Pipeline shutdown .24
10.4 Pipeline system depressurization .24
10.4.1 General .24
10.4.2 Pipeline depressurization .24
10.4.3 Vent facilities . 25
10.5 Inspection, monitoring and testing . 25
10.5.1 General . 25
10.5.2 In-line inspection procedure . 25
10.5.3 Monitoring of water content and dew point . 26
10.5.4 Network code or equivalent set of operational terms and conditions . 26
10.5.5 Measurement of CO stream at each custody transfer point . 26
10.5.6 Measurement of impurities. 26
10.5.7 Action to be taken in the event of an exceedance of impurities .27
10.5.8 Measurement of CO mass flow rate .27
11 Re-qualification of existing pipelines for CO service .27
Annex A (informative) Examples of CO stream compositions .29
Annex B (informative) CO characteristics .33
Annex C (informative) Internal corrosion and erosion .35
iv
ISO 27913:2024(en)
Annex D (informative) Avoidance of running ductile fracture: Approach for the evaluation of
fracture arrest . .37
Annex E (informative) Data requirements for an integrity management plan .39
Annex F (informative) Depressurization of a dense phase CO stream avoiding low pipeline
temperature issues .40
Bibliography .42
v
ISO 27913:2024(en)
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.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 265, Carbon dioxide capture, transportation,
and geological storage.
This second edition cancels and replaces the first edition (ISO 27913:2016), which has been technically
revised.
The main changes are as follows:
— the entire text has been editorially revised;
— normative references have been updated;
— a subclause about CO stream flowrate and impurity measurement has been added;
— the level of impurities has been limited to 5 % and a set of 17 requirements are defined to ensure CO
stream pipeline integrity;
— Annex A has been added to show example compositions of CO streams for gaseous and dense phase CO
2 2
streams which fulfil the requirements of this document;
— the latest findings in fracture arrest design have been included in Annex D;
— Annex F has been added to describe the decompression effects on pressure and temperature versus time.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
vi
ISO 27913:2024(en)
Introduction
Carbon dioxide (CO ) capture, carbon dioxide use (CCU) and carbon dioxide storage (CCS) have been identified
as key abatement technologies for achieving a significant reduction in CO emissions to the atmosphere.
Pipelines are likely to be the primary means of transporting CO from the point-of-capture to storage sites
(e.g. depleted hydrocarbon formations, deep saline aquifers), or to usage points (e.g. enhanced oil recovery
or utilization) to avoid its release to the atmosphere. While there is a perception that transporting CO via
pipelines does not represent a significant barrier to implementing large-scale CCS, there is significantly less
industry experience than there is for hydrocarbon service (e.g. natural gas). Furthermore, there are a number
of issues that need to be adequately understood and associated risks that need to be effectively managed
to ensure safe transport of CO . In a CCS or CCU context, there is a need for larger CO pipeline systems in
2 2
more densely populated areas and with CO coming from multiple sources. Also, offshore pipelines for the
transportation of CO to offshore storage sites are likely to become common.
The objective of this document is to provide specific requirements and recommendations on certain aspects
of safe and reliable design, construction and operation of pipelines intended for the large-scale transportation
of CO that are not already covered in existing pipeline standards such as ISO 13623, ASME B31.4,
ASME B31.8, EN 1594, AS 2885 or other standards listed in the Bibliography. Existing pipeline standards
cover many of the issues related to the design and construction of CO pipelines. However, there are some
CO -specific issues (e.g. fracture arrest, internal corrosion protection) that are not adequately covered in
these standards but are addressed in this document. The purpose of this document is to cover these issues
consistently. Hence, this document is not a standalone standard, but is written to be a supplement to other
existing pipeline standards for natural gas or liquids for both onshore and offshore pipelines.
The system boundary (see Figure 1) between capture and transportation is the point at the inlet valve of the
pipeline, where the composition, temperature and pressure of the CO stream is within a certain specified
range to meet the requirements for transportation as described in this document.
The boundary between transportation and storage or utilization is the point where the CO stream leaves the
transportation pipeline infrastructure and enters the downstream infrastructure, which can be permanent
geological storage, utilization or buffer storage prior to shipping.
vii
ISO 27913:2024(en)
Key
1 source of CO from capture (e.g. from power plant, industry; see ISO/TR 27912)
2 isolating joint
3 boundary limit
4 other source of CO
5 transportation system inside given in this document
6 boundary to storage facility or utilization
7 onshore storage facility
8 offshore storage facility
9 enhanced oil recovery
10 riser (outside transportation scope)
11 subsea valve (inside transportation scope)
12 beach valve
13 offshore pipeline
14 onshore pipeline
15 valve
16 landfall
17 open water
18 third party transport system
19 export to other uses than those of Keys 7, 8 and 9
20 intermediate compression or pumping
Figure 1 — Schematic illustration of the system boundaries of this document
viii
International Standard ISO 27913:2024(en)
Carbon dioxide capture, transportation and geological
storage — Pipeline transportation systems
1 Scope
This document specifies the requirements and recommendations for the transportation of CO streams
from the capture site to the storage facility where it is primarily stored in a geological formation or used for
other purposes (e.g. for enhanced oil recovery or CO use).
This document applies to the transportation of CO streams by
— rigid metallic pipelines,
— pipeline systems,
— onshore and offshore pipelines for the transportation of CO streams,
— conversion of existing pipelines for the transportation of CO streams, and
— transportation of CO streams in the gaseous and dense phases.
This document also includes aspects of CO stream quality assurance, as well as converging CO streams
2 2
from different sources.
Health, safety and environment aspects specific to CO transport and monitoring are also considered in this
document.
Transportation of CO via ship, rail or on road is not covered in this document.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements 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 20765-2, Natural gas — Calculation of thermodynamic properties — Part 2: Single-phase properties (gas,
liquid, and dense fluid) for extended ranges of application
ISO/TR 27925, Carbon dioxide capture, transportation and geological storage — Cross cutting issues — Flow
assurance
API SPEC 5L, Line Pipe, 46th Edition, April 2018
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
ISO 27913:2024(en)
3.1
aqueous phase
liquid phase composed predominantly of water and other impurities that are not dissolved in the gaseous or
dense CO phase
3.2
block valve
full-bore valve inserted into a pipeline to reduce the total volume of the CO stream (3.4) that would be emitted
in the case of planned or unplanned depressurization of that section or in the case of a pipeline rupture
3.3
bubble point pressure
pressure of the saturated liquid at a given composition and temperature
3.4
CO stream
stream consisting overwhelmingly of carbon dioxide
Note 1 to entry: A carbon dioxide stream consists of usually more than 95 mol% CO .
3.5
corrosion allowance
additional wall thickness beyond that required by the mechanical design to compensate for any reduction in
wall thickness by corrosion (internal/external) during the design operational life
3.6
critical point
highest temperature and pressure at which a pure substance (e.g. CO ) can exist as a gas and a liquid in
equilibrium
Note 1 to entry: For a multicomponent fluid mixture of a given composition, the critical point is the merge of the
bubble point curve and the dew point curve.
Note 2 to entry: The critical point can be established with the critical pressure (3.7) and the critical temperature (3.8).
3.7
critical pressure
vapour pressure at the critical temperature (3.8)
Note 1 to entry: The critical pressure for pure CO is 7,38 MPa.
3.8
critical temperature
pure substance temperature above which liquid cannot be formed simply by increasing the pressure
Note 1 to entry: The critical temperature of pure CO is 304,13 K (equivalent to 30,98 °C).
Note 2 to entry: For CO streams (3.4), phase transitions can still occur above critical temperature.
3.9
dense phase
CO or CO streams (3.4) in the single-phase fluid state above a density of 500 kg/m
2 2
Note 1 to entry: For more details on the dense phase, refer to ISO/TR 27925.
3.10
dew point pressure
pressure on the saturated vapour line
ISO 27913:2024(en)
3.11
ductile fracture
shear fracture
mechanism which takes place by the propagation of a crack or stress-raising features, linked with a
considerable amount of local plastic deformation
3.12
environmental cracking
brittle fracture of a normally ductile material in which the corrosive effect of the environment is causing the
embrittlement
3.13
flow assurance
engineering discipline that is required to understand the behaviour of fluids inside pipelines, at flowing and
static conditions
Note 1 to entry: The flow assurance provides input to design activities, such as pipeline design or risk analysis and
operating philosophy development.
3.14
fracture arrestor
crack arrestor
additional pipeline component that can be installed around portions of a pipeline designed to resist
propagating fractures
3.15
hydraulic capacity
maximum flow rate achievable in a system for a given pressure loss and given mechanical and operating
constraints
3.16
in-line inspection
ILI
operation of sending an inspection tool inside a pipeline for the purposes of maintenance procedures such as
pipeline cleaning, liquid removal, corrosion detection
3.17
internal coating
layer to reduce internal roughness and minimize friction pressure loss on the inside of the pipeline
3.18
maximum allowable operating pressure
MAOP
highest possible pressure to which the equipment or system may reasonably be exposed locally during
operation
3.19
minimum design temperature
lowest possible temperature to which the equipment or system may reasonably be exposed locally during
installation and operation
3.20
multi-phase flow
co-existence of more than one fluid phases (e.g. gas and dense phases (3.9) or two dense phases) in the same
location of the pipeline
3.21
non-condensable component
component that, when pure, can be in gaseous form at possible CO equilibrium conditions throughout the
CO value chain
EXAMPLE N , Ar, H , CO, CH , O (excluding CO ).
2 2 4 2 2
ISO 27913:2024(en)
3.22
operating envelope
limited range of parameters over which operations result in safe and acceptable performance of the
equipment or system
3.23
pipeline commissioning
activities associated with the initial filling and pressurization of the pipeline system with the fluid to be
transported
3.24
pipeline dewatering
removal of water after hydraulic testing of the pipeline system
3.25
rapid gas decompression
phenomenon brought about by pressurized fluid migrating at a molecular level into a polymer and then
being released suddenly causing failure of polymeric materials
3.26
saturation pressure
saturation vapour pressure
pressure of a vapour which is in equilibrium with its liquid at a given temperature applicable to pure CO
Note 1 to entry: For a CO stream (3.4) containing impurities, the saturation pressure can either be the pressure on
the saturated liquid line [bubble point pressure (3.3)] or the pressure on the saturated vapour line [dew point pressure
(3.10)]. For CO streams, both pressures are different for a given temperature.
3.27
short-term storage reserve
accumulation of the fluid in a pressurized section of a pipeline additional to the fluid that is extracted from
the pipeline, for the purpose of temporary storage of that fluid
3.28
single phase
flow of CO or a CO stream (3.4) in a gas or a dense phase (3.9), but not in any combination of them
2 2
3.29
threat
activity or condition that alone or in combination with others has the potential to cause damage or to
produce another negative impact if not adequately controlled
3.30
triple point
temperature and pressure at which the three phases (gas, liquid and solid) of a substance coexist in
thermodynamic equilibrium
3.31
vent station
installation from which the contents of the pipeline or a section of pipeline between block valves (3.2) can
be vented
3.32
network code
set of rules that are operational terms and conditions and agreed by either operators or governments, or
both, under which a CO stream system is required to operate safely and in a way that allows the objectives
of each party to be realised
Note 1 to entry: Figure 1 shows where the network code becomes relevant for different system operators.
ISO 27913:2024(en)
4 Symbols and abbreviated terms
4.1 Symbols
2 2
A cross-section area of the notched-bar impact specimen equal to 80 mm mm
C
Charpy V-notch absorbed energy value of the pipeline steel measured in the transverse direc-
C J
v
tion
D outer diameter of the pipe mm
E Young’s modulus MPa
P pressure MPa
P bubble point pressure at given temperature and CO stream composition MPa
s 2
R average pipe radius mm
t wall thickness of the pipe mm
t minimum wall thickness mm
min
t minimum wall thickness against internal pressure mm
minDP
t minimum wall thickness against hydraulic shock mm
minHS
t minimum wall thickness against fracture propagation mm
minDF
T temperature °C
σ flow stress MPa
f
4.2 Abbreviated terms
collective term for the highly volatile aromatic hydrocarbons benzene, toluene, ethylbenzene and
BTEX
xylene
BTCM Battelle Two Curve Method
CCS carbon dioxide capture and storage
CCU carbon dioxide capture and utilization
DEG diethylene glycol
EOR enhanced oil recovery
ILI in-line inspection
IMP integrity management plan
MAOP maximum allowable operating pressure
MEG monoethylene glycol
SSC sulphide stress cracking
TEG tri-ethylene glycol
ISO 27913:2024(en)
NDMA N-nitrosodimethy
...
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