EN 1594:2024
(Main)Gas infrastructure - Pipelines for maximum operating pressure over 16 bar - Functional requirements
Gas infrastructure - Pipelines for maximum operating pressure over 16 bar - Functional requirements
This document describes the functional requirements for pipelines for maximum operating pressure over 16 bar. This document also describes the mechanical requirements for pipework in stations with a maximum operating pressure greater than 16 bar.
NOTE 1 Welding requirements are described in EN 12732. Functional requirements for stations are given in EN 1776, EN 1918-5, EN 12186, and EN 12583.
This document is applicable for transporting gas via onshore high-pressure steel pipeline infrastructures, where the following applies:
- onshore:
- from the point where the pipeline first crosses what is normally accepted as battery limit between onshore and offshore, and that is not located within commercial or industrial premises as an integral part of the industrial process on these premises except for any pipelines and facilities supplying such premises;
- pipeline system with a starting point onshore, also when parts of the pipeline system on the mainland subsequently cross fjords, lakes, etc.
- high pressure: gas with a maximum operating pressure over 16 bar and a design temperature between −40 °C and 120 °C.
- steel pipeline infrastructure: infrastructure consisting of pipeline components, such as pipes, valves, couplings and other equipment, restricted to components made of unalloyed or low alloyed carbon steel and joined by welds, flanges or mechanical couplings.
- gas: non-corrosive natural gas, biomethane gas, hydrogen gas and mixtures of these gases where technical evaluation has ensured that operating conditions or constituents or properties of the gas do not affect the safe operation of the pipeline.
Gas infrastructures covered by this document begin after the gas producer's metering station.
NOTE 2 The functional demarcation of the pipeline system is usually directly after an isolating valve of the installation, but can differ in particular situations. The functional demarcation of the pipeline system is usually located on an isolating valve of the installation, but can differ in particular situations.
A schematic representation of pipelines for gas infrastructure is given in Figure 1.
This document can also be applied to the repurposing of existing pipelines.
[Figure 1 - Schematic representation of pipelines for gas supply over 16 bar]
This document specifies common basic principles for gas infrastructure. Users of this standard are expected to be aware that more detailed national standards and/or code of practice can exist in the CEN member countries.
This document is intended to be applied in association with these national standards and/or codes of practice setting out the above-mentioned basic principles.
In the event of conflicts in terms of more restrictive requirements in national legislation/regulation with the requirements of this standard, the national legislation/regulation takes precedence as illustrated in CEN/TR 13737.
CEN/TR 13737 gives:
- clarification of all legislations/regulations applicable in a member state;
- if appropriate, more restrictive national requirements;
- a national contact point for the latest information.
Gasinfrastruktur - Rohrleitungen für einen maximal zulässigen Betriebsdruck über 16 bar - Funktionale Anforderungen
Dieses Dokument beschreibt die funktionalen Anforderungen an Leitungen mit einem maximal zulässigen Betriebsdruck von über 16 bar. Dieses Dokument legt darüber hinaus die mechanischen Anforderungen an Rohrleitungen in Stationen mit einem maximal zulässigen Betriebsdruck von mehr als 16 bar fest.
ANMERKUNG 1 Die Anforderungen an das Schweißen sind in EN 12732 beschrieben. Die funktionalen Anforderungen für Stationen sind in EN 1776, EN 1918 5, EN 12186 und EN 12583 beschrieben.
Dieses Dokument gilt für den Transport von Gas über landverlegte Hochdruck-Stahlrohrleitungen, für die Folgendes gilt:
- landverlegt:
-- ab der Stelle, an der die Rohrleitungen zuerst die üblicherweise als Grenze (Battery Limit) zwischen auflandig (onshore) und ablandig (offshore) anerkannt sind, und die sich nicht innerhalb eines Gewerbe- oder Werksgeländes als integraler Bestandteil des industriellen Prozesses auf diesem Gelände befinden, ausschließlich der Versorgung solcher Grundstücke dienen und kein wesentlicher Bestandteil der Anlagen für Betriebsabläufe auf diesem Gelände sind;
-- auf dem Festland ihren Ausgang nehmende Leitungssysteme sowie für Teile von Leitungssystemen auf dem Festland, die nachfolgend durch Fjorde, Seen usw. verlaufen.
- Hochdruck: Gas mit einem maximal zulässigen Betriebsdruck von über 16 bar und einer Auslegungstemperatur zwischen −40 °C und 120 °C.
- Infrastruktur für Stahlrohrleitungen: Infrastruktur, die aus Rohrleitungskomponenten wie Rohren, Ventilen, Kupplungen und anderen Einrichtungen besteht und auf Komponenten aus unlegiertem oder niedrig legiertem Kohlenstoffstahl beschränkt ist, die durch Schweißverbindungen, Flanschverbindungen oder mechanische Kupplungen verbunden sind.
- Gas: nicht korrosives Erdgas, Biomethangas, Wasserstoffgas und Gemische dieser Gase, wenn die technische Bewertung ergeben hat, dass die Betriebsbedingungen oder die Bestandteile oder Eigenschaften des Gases den sicheren Betrieb der Rohrleitung nicht beeinträchtigen.
Die Gasinfrastruktur, für die dieses Dokument gilt, beginnt am Ausgang der Messstation des Gasproduzenten.
[…]
Infrastructures gazières - Canalisation pour pression maximale de service supérieure à 16 bar - Prescriptions fonctionnelles
Ce document décrit les exigences fonctionnelles des canalisations pour une pression de service maximale supérieure à 16 bar. Ce document décrit également les exigences mécaniques des canalisations des stations dont la pression maximale de service est supérieure à 16 bar.
NOTE 1 Les exigences de soudage sont décrites dans l'EN 12732. Les exigences fonctionnelles pour les stations sont données dans l'EN 1776, l'EN 1918-5, l'EN 12186 et l'EN 12583.
Le présent document s'applique au transport de gaz via des infrastructures terrestres de canalisations en acier à haute pression, lorsque les conditions suivantes s'appliquent :
- à terre :
- à partir du point où la canalisation traverse pour la première fois ce qui est normalement accepté comme limite de batterie entre onshore et offshore, et qui n'est pas situé dans des locaux commerciaux ou industriels en tant que partie intégrante du processus industriel sur ces locaux, à l'exception des canalisations et des installations alimentant ces locaux;
- système de canalisations avec un point de départ à terre, également lorsque des parties du système de canalisations sur le continent traversent ensuite des fjords, des lacs, etc.
- haute pression : gaz avec une pression de service maximale supérieure à 16 bars et une température de conception comprise entre −40 °C et 120 °C.
- infrastructure de canalisation en acier : infrastructure composée de composants de canalisations, tels que tuyaux, vannes, raccords et autres équipements, limités aux composants en acier au carbone non allié ou faiblement allié et reliés par des soudures, des brides ou des raccords mécaniques.
- gaz : gaz naturel non corrosif, biométhane gazeux, hydrogène gazeux et mélanges de ces gaz lorsque l'évaluation technique a assuré que les conditions de fonctionnement ou les constituants ou propriétés du gaz n'affectent pas la sécurité d'exploitation de la canalisation.
Les infrastructures gazières visées par ce document commencent après le poste de comptage du producteur de gaz.
NOTE 2 La démarcation fonctionnelle du système de canalisations dans une zone d'usine se situe généralement directement après la première vanne d'isolement de l'installation, mais peut différer dans des situations particulières.
Une représentation schématique des canalisations pour les infrastructures gazières est donnée à la figure 1.
Ce document peut également s'appliquer à la reconversion de canalisations existantes.
[Figure 1 - Représentation schématique des canalisations de transport de gaz au-dessus de 16 bar]
Le présent document spécifie les principes de base communs pour les systèmes d'alimentation en gaz. Il convient que les utilisateurs de la présente norme gardent à l'esprit l'existence éventuelle, dans les pays membres du CEN, de codes de pratique et/ou normes nationales.
Le présent document est destiné à être appliqué conjointement avec ces normes nationales et/ou codes de pratique qui détaillent les principes précités.
En cas de conflits liés à des exigences législatives/réglementaires plus restrictives que les prescriptions du présent document, la législation/réglementation nationale doit avoir la priorité comme précisé dans le CEN/TR 13737.
Le CEN/TR 13737 contient :
- la clarification de la législation/réglementation pertinente applicable dans un pays ;
- si appropriée, les exigences nationales plus restrictives ;
- le contact national pour les dernières informations.
Infrastruktura za plin - Cevovodni sistemi za najvišji delovni tlak nad 16 bar - Funkcionalne zahteve
Ta evropski standard se uporablja za transport plina prek kopenskih visokotlačnih jeklenih plinovodnih infrastruktur, pri čemer velja naslednje:
– kopensko: od točke, kjer cevovod prvič prečka točko, ki se običajno šteje kot razmejitev med kopenskim in morskim delom cevovoda, pri čemer cevovod ni nameščen znotraj poslovnih ali industrijskih območij kot sestavni del industrijskega postopka na teh območjih, razen cevovodov in opreme za dostavo plina na ta območja. Ta evropski standard se uporablja za cevovodne sisteme z izhodiščem na kopnem, tudi kadar cevovodni sistem na kopnem prečka fjorde, jezera itd.
– visokotlačno: plin z najvišjim delovnim tlakom nad 16 bar ter konstrukcijsko temperaturo med −40 °C in 120 °C;
– jeklena plinovodna infrastruktura: jeklena infrastruktura za plin, ki jo sestavljajo komponente cevovoda, kot so cevi, ventili, spojke in druga oprema. Na področje uporabe tega dokumenta spadajo komponente cevovoda, izdelane iz nelegiranega ali malo legiranega ogljikovega jekla, ki so zvarjene oziroma združene s prirobnicami ali z mehanskimi spojkami.
– plin: nestrupen in nekoroziven zemeljski plin, biometan, vodik in mešanice teh plinov, pri katerih je bilo s tehničnim vrednotenjem zagotovljeno, da delovni pogoji, sestavine oziroma lastnosti plina ne vplivajo na varno delovanje cevovodnega sistema.
Infrastrukture za plin, ki jih zajema ta evropski standard, se začnejo za merilnimi postajami proizvajalcev plina. Funkcionalna razmejitev cevovodnega sistema na območju obrata se določi od primera do primera. To je običajno neposredno po prvem ločilnem ventilu merilne napeljave.
Ta evropski standard opisuje tudi mehanske zahteve za cevovode v plinskih postajah z najvišjim delovnim tlakom nad 16 barov.
Zahteve za varjenje so opisane v standardu EN 12732. Funkcionalne zahteve za postaje so podane v standardih EN 1776, EN 1918-5, EN 12186 in EN 12583. Zahteve za varno upravljanje in celostno obvladovanje cevovodnega sistema so podane v standardu EN 17649.
Ta evropski standard določa splošna osnovna načela za infrastrukture za plin. Uporabniki tega evropskega standarda naj se zavedajo, da lahko v državah članicah CEN obstajajo podrobnejši nacionalni standardi in kodeksi ravnanja.
Ta evropski standard je namenjen uporabi v povezavi s temi nacionalnimi standardi in/ali kodeksi ravnanja, ki določajo zgoraj navedena načela.
Ta evropski standard se ne uporablja za obstoječe cevovodne sisteme, ki so bili v uporabi pred objavo tega evropskega standarda, ali za spremembe obstoječih cevovodnih sistemov, razen za prilagoditev cevovodnih sistemov za uporabo vodika in njegovih mešanic.
Kadar so strožje zahteve v nacionalni zakonodaji/predpisu v nasprotju z zahtevami iz tega evropskega standarda, ima prednost nacionalna zakonodaja/predpis, kot je navedeno v standardu CEN/TR 13737 (vsi deli).
Ta evropski standard se sklicuje na ustrezne evropske in druge priznane standarde za izdelke, ki se uporabljajo za izdelavo in delovanje infrastruktur za plin.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2024
Nadomešča:
SIST EN 1594:2013
Infrastruktura za plin - Cevovodni sistemi za najvišji delovni tlak nad 16 bar -
Funkcionalne zahteve
Gas infrastructure - Pipelines for maximum operating pressure over 16 bar - Functional
requirements
Gasinfrastruktur - Rohrleitungen für einen maximal zulässigen Betriebsdruck über 16 bar
- Funktionale Anforderungen
Infrastructures gazières - Canalisation pour pression maximale de service supérieure à
16 bar - Prescriptions fonctionnelles
Ta slovenski standard je istoveten z: EN 1594:2024
ICS:
91.140.40 Sistemi za oskrbo s plinom Gas supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 1594
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2024
EUROPÄISCHE NORM
ICS 23.040.01; 75.200 Supersedes EN 1594:2013
English Version
Gas infrastructure - Pipelines for maximum operating
pressure over 16 bar - Functional requirements
Infrastructures gazières - Canalisation pour pression Gasinfrastruktur - Rohrleitungen für einen maximal
maximale de service supérieure à 16 bar - zulässigen Betriebsdruck über 16 bar - Funktionale
Prescriptions fonctionnelles Anforderungen
This European Standard was approved by CEN on 1 October 2023.
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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1594:2024 E
worldwide for CEN national Members.
Contents Page
European foreword . 6
Introduction . 8
1 Scope . 9
2 Normative references . 11
3 Terms and definitions . 13
4 Quality and management systems . 18
5 Safety and the environment . 19
5.1 General. 19
5.2 Appropriate safety measures . 19
5.3 Routing considerations . 20
5.3.1 General. 20
5.3.2 Surveys. 20
5.3.3 Environmental impact . 20
5.3.4 Ground conditions . 21
5.4 Line valve spacing . 21
6 Pressure safety . 21
6.1 Pressure levels . 21
6.2 Normal operation . 22
6.3 Requirements for installation of pressure safety devices . 22
6.4 Pipeline with DP equal to or less than 40 bar and hoop stress ≤ 0,45 R . 23
t0,5
6.5 Pipeline with DP equal to or less than 24 bar and hoop stress ≤ 0,30 R . 23
t0,5
7 Design . 23
7.1 General. 23
7.1.1 Design principles . 23
7.1.2 Basis of design . 23
7.2 Wall thickness determination . 24
7.2.1 Straight pipe . 24
7.2.2 Bends and elbows . 25
7.3 Additional design requirements . 25
7.3.1 Forces . 25
7.3.2 Soil engineering data required . 26
7.3.3 Structural models for pipeline sections. 26
7.4 Analysis of stress and strain . 27
7.4.1 Elastic and extended elastic design . 27
7.4.2 Limit state design . 28
7.5 Design report . 29
7.6 Land management and geotechnical studies . 30
7.7 Depth of cover . 30
7.8 Casing pipes . 30
7.9 Station design . 31
7.9.1 Layout . 31
7.9.2 Components . 32
7.9.3 Interaction with onshore pipeline section . 32
7.9.4 Station pipework . 33
7.10 Pipeline components . 33
7.11 Pigging suitability . 33
7.12 Arrangements for venting, recompression and flaring . 33
7.13 Corrosion protection . 34
7.13.1 General . 34
7.13.2 External coating . 34
7.13.3 Cathodic protection . 35
7.14 Grid connections . 35
8 Materials and components . 36
8.1 General . 36
8.1.1 Base material . 36
8.1.2 Manufacturing requirements . 36
8.1.3 Manufacturing procedure. 36
8.1.4 Weldability . 36
8.1.5 Mechanical properties . 37
8.1.6 Inspection documents . 38
8.1.7 Other steel types or grades . 38
8.1.8 Records . 38
8.2 Pipes . 38
8.3 Fittings . 39
8.3.1 General . 39
8.3.2 Manufacturing. 39
8.4 Flanged connections . 39
8.5 Insulating connections . 39
8.5.1 Type test . 39
8.5.2 Strength test . 39
8.5.3 Electrical test . 40
8.5.4 External tightness test . 40
8.6 Valves . 40
8.7 External and internal coatings . 40
8.8 Welding end preparation . 40
9 Construction . 40
9.1 General . 40
9.2 Execution of work . 40
9.2.1 General . 40
9.2.2 Marking out the site . 40
9.2.3 Initial site inspections . 41
9.2.4 Working strip . 41
9.2.5 Separation of topsoil . 41
9.2.6 Trenches . 41
9.2.7 Crossing and proximity of buried structures (cables and pipes) . 42
9.2.8 Handling and stringing . 42
9.2.9 Bends . 43
9.2.10 Welding and weld examination . 43
9.2.11 External coating . 43
9.2.12 Lowering into the trench . 46
9.2.13 Ballasting and anchoring . 46
9.2.14 Tie-ins . 46
9.2.15 Backfill . 46
9.2.16 Reinstatement . 47
9.2.17 Markings . 47
9.2.18 Final site inspection with owners and users . 47
9.3 Special crossings . 47
9.3.1 General. 47
9.3.2 Open-trench road or path crossings . 47
9.3.3 Trenchless crossings . 48
9.3.4 Requirements for casings . 51
9.3.5 Open trench major water crossings . 51
9.3.6 Horizontal directional drilling . 51
9.4 Cleaning . 52
9.5 Testing . 52
9.5.1 General. 52
9.5.2 Test preparation . 53
9.5.3 Strength test . 53
9.5.4 Tightness test . 53
9.5.5 Pre-testing . 54
9.5.6 Dewatering . 54
9.5.7 Golden welds . 54
9.6 Acceptance. 54
9.6.1 As-built documents . 54
9.6.2 Pre-commissioning . 54
9.6.3 Handover and documentation . 55
10 Operation and maintenance . 55
10.1 General. 55
10.1.1 Policy . 55
10.1.2 Safety and environment . 55
10.2 Organization . 55
10.3 Operating and maintenance instructions . 56
10.4 Emergency plan . 57
10.5 Records and documentation . 57
10.6 Commissioning . 57
10.7 Decommissioning . 58
10.8 Recommissioning . 58
10.9 Maintenance, modification, and repair . 58
10.9.1 General. 58
10.9.2 Pipeline surveillance, inspection and monitoring . 58
10.9.3 Execution of repairs and modifications . 59
10.9.4 Work involving cutting of the pipeline . 59
10.9.5 Work on in-service pipelines . 59
10.9.6 Repairs after emergency . 60
10.9.7 Other and special maintenance activities . 60
10.10 Introduction of hydrogen in existing natural gas pipelines . 61
10.11 Abandonment and removal . 61
Annex A (normative) Requirements for fracture arrest of line pipe . 62
A.1 General. 62
A.2 CVN impact test . 63
A.3 Drop weight tear test . 65
A.4 Test pieces, method, and frequency for CVN and DWT tests . 65
Annex B (informative) Hydrogen gas pipelines . 66
B.1 General. 66
B.2 New pipelines . 66
B.3 Existing pipelines . 66
B.4 Other considerations . 67
Bibliography . 68
European foreword
This document (EN 1594:2024) has been prepared by Technical Committee CEN/TC 234 “Gas
infrastructure”, the secretariat of which is held by DIN.
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 September 2024, and conflicting national standards shall
be withdrawn at the latest by September 2024.
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.
This document supersedes EN 1594:2013.
The main changes between this document and the previous edition EN 1594:2013 are as follows:
— addition of supplements with respect to available technologies, like aspects of pipeline inspection,
corrosion protection, aspects of gases with low ignition energy considered such as hydrogen;
— restructuring and rephrasing of scope to improve understanding (Clause 1);
— update of references to other documents (Clause 2 and Bibliography);
— revision of terms and definitions including clarification of substance ‘gas’ (Clause 3).
— addition of arrangements for venting, recompression and flaring (Clause 7);
— adjustment of minimum impact energy values to appropriate safety values (Clause 8);
— removal of all annexes, because they were outdated and considered covered in other European
standards;
— addition of new normative annex with requirements for fracture arrest of line pipe (Annex A),
adopted from EN ISO 3183:2012 as they were taken out in the current edition of EN ISO 3183
(published in 2019);
— addition of new informative with recommendations related to hydrogen pipelines (Annex B).
This document has been prepared under a Standardization Request given to CEN by the European
Commission and the European Free Trade Association.
There is a complete suite of functional standards prepared by CEN/TC 234 “Gas infrastructure” to cover
all parts of the gas infrastructure from the input of gas to the transmission system up to the inlet
connection of the gas appliances, whether for domestic, commercial or industrial purposes.
Conformance to this document ensures the interoperability, safety and reliability requirements of
pipeline systems.
Directive 2009/73/EC concerning common rules for the internal market in natural gas and the related
Regulation (EC) No 715/2009 on conditions for access to the natural gas transmission networks also aim
at technical safety (security) including technical reliability of the European gas system. These aspects and
Directive (EU) 2018/2001 on the promotion of the use of energy from renewable sources are also in the
scope of CEN/TC 234 standardization. In this respect, CEN/TC 234 evaluated the indicated EU legislation
and amended this document accordingly, where required and appropriate.
CEN/TC 234 will continue its work updating this document to the latest developments at regular
intervals.
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 organisations 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.
Introduction
This document describes the general functional requirements for gas supply through pipe systems and
covers the pressure range greater than 16 bar maximum operating pressure for steel systems. It gives
normative and informative references for safe and secure gas infrastructure. It applies to their design,
construction, operation and the related aspects of safety, environment and public health, all in order to
provide a safe and secure supply of gas.
The requirements of this document are based on safe gas engineering practice under conditions normally
encountered in the gas industry. Requirements for all unusual conditions cannot be specifically provided
for, nor are all engineering and construction details prescribed.
Existing industrial safety regulations applying to work areas, safety devices and safe work practices are
not intended to be supplanted by this document.
Managers with responsibilities for the design, construction and operation of gas infrastructure will have
regard to the guidance given in this document and to other relevant standards. It is the responsibility of
these managers and engineers to apply these functional requirements, supplemented with other proven
good practice to the particular circumstances of all gas infrastructures.
The designer, constructor or operator of pipeline systems is cautioned that this document is not a design
handbook or code of practice. Additional national or company standards describing the details are
needed. These detailed standards should be in line with the basic principles of this document.
In preparing this document it was recognized that the suite of relevant European standards is incomplete.
Where appropriate, reference is made to international, national or other standards until relevant
European standards are available.
In preparing this document, a basic understanding of gas supply by the user has been assumed. Gas
infrastructure is complex and the importance on safety of their construction and use has led to the
development of very detailed codes of practice and operating manuals in member countries. These
detailed statements embrace recognized standards of gas engineering and specific requirements imposed
by legal structures of these member countries.
1 Scope
This document describes the functional requirements for pipelines for maximum operating pressure over
16 bar. This document also describes the mechanical requirements for pipework in stations with a
maximum operating pressure greater than 16 bar.
NOTE 1 Welding requirements are described in EN 12732. Functional requirements for stations are given in
EN 1776, EN 1918-5, EN 12186, and EN 12583.
This document is applicable for transporting gas via onshore high-pressure steel pipeline infrastructures,
where the following applies:
— onshore:
— from the point where the pipeline first crosses what is normally accepted as battery limit
between onshore and offshore, and that is not located within commercial or industrial premises
as an integral part of the industrial process on these premises except for any pipelines and
facilities supplying such premises;
— pipeline system with a starting point onshore, also when parts of the pipeline system on the
mainland subsequently cross fjords, lakes, etc.;
— high pressure: gas with a maximum operating pressure over 16 bar and a design temperature
between −40 °C and 120 °C;
— steel pipeline infrastructure: infrastructure consisting of pipeline components, such as pipes, valves,
couplings and other equipment, restricted to components made of unalloyed or low alloyed carbon
steel and joined by welds, flanges or mechanical couplings;
— gas: non-corrosive natural gas, biomethane gas, hydrogen gas and mixtures of these gases where
technical evaluation has ensured that operating conditions or constituents or properties of the gas
do not affect the safe operation of the pipeline.
Gas infrastructures covered by this document begin after the gas producer's metering station.
NOTE 2 The functional demarcation of the pipeline system is usually directly after an isolating valve of the
installation, but can differ in particular situations. The functional demarcation of the pipeline system is usually
located on an isolating valve of the installation, but can differ in particular situations.
A schematic representation of pipelines for gas infrastructure is given in Figure 1.
This document can also be applied to the repurposing of existing pipelines.
Key
Symbols Stations
pipelines covered by this document 1 P – well, production
pipelines not covered by this document 2 T – treatment
pressure regulation 3 D – odorization
pressure safety system 4 S 1 – gas receiving
metering, gas analysis and sampling 5 S 2 – valve station
system
compression 6 S 3 – delivery station
valve 7 S 4 – compressor station
isolation device 8 S 5 – other supply (e.g. for blending)
9 S 6 – export or import (e.g. storage and
neighbouring network)
10 S 7 – pressure regulating
11 S 8 – domestic distribution
12 S 9 – industrial distribution
13 S 10 – storage
Figure 1 — Schematic representation of pipelines for gas supply over 16 bar
This document specifies common basic principles for gas infrastructure. Users of this standard are
expected to be aware that more detailed national standards and/or code of practice can exist in the CEN
member countries.
This document is intended to be applied in association with these national standards and/or codes of
practice setting out the above-mentioned basic principles.
In the event of conflicts in terms of more restrictive requirements in national legislation/regulation with
the requirements of this standard, the national legislation/regulation takes precedence as illustrated in
CEN/TR 13737.
CEN/TR 13737 gives:
— clarification of all legislations/regulations applicable in a member state;
— if appropriate, more restrictive national requirements;
— a national contact point for the latest information.
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.
EN 1092-1, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN
designated — Part 1: Steel flanges
EN 1514 (all parts), Flanges and their joints — Dimensions of gaskets for PN-designated flanges
EN 1515-2, Flanges and their joints — Bolting — Part 2: Classification of bolt materials for steel flanges, PN
designated
EN 1515-3, Flanges and their joints — Bolting — Part 3: Classification of bolt materials for steel flanges,
class designated
EN 1515-4, Flanges and their joints — Bolting — Part 4: Selection of bolting for equipment subject to the
Pressure Equipment Directive 2014/68/EU
EN 1759-1, Flanges and their joint — Circular flanges for pipes, valves, fittings and accessories, Class
designated — Part 1: Steel flanges, NPS 1/2 to 24
EN 1998-4, Eurocode 8 — Design of structures for earthquake resistance — Part 4: Silos, tanks and pipelines
EN 10204, Metallic products — Types of inspection documents
EN 10289, Steel tubes and fittings for onshore and offshore pipelines — External liquid applied epoxy and
epoxy-modified coatings
EN 10290, Steel tubes and fittings for onshore and offshore pipelines — External liquid applied
polyurethane and polyurethane-modified coatings
EN 12186, Gas infrastructure — Gas pressure regulating stations for transmission and distribution —
Functional requirements
EN 12327, Gas infrastructure — Pressure testing, commissioning and decommissioning procedures —
Functional requirements
EN 12560-1, Flanges and their joints — Gaskets for Class-designated flanges — Part 1: Non-metallic flat
gaskets with or without inserts
EN 12560-2, Flanges and their joints — Dimensions of gaskets for Class-designated flanges — Part 2: Spiral
wound gaskets for use with steel flanges
EN 12560-3, Flanges and their joints — Gaskets for Class-designated flanges — Part 3: Non-metallic PTFE
envelope gaskets
EN 12560-4, Flanges and their joints — Gaskets for Class-designated flanges — Part 4: Corrugated, flat or
grooved metallic and filled metallic gaskets for use with steel flanges
EN 12560-5, Flanges and their joints — Gaskets for Class-designated flanges — Part 5: Metallic ring joint
gaskets for use with steel flanges
EN 12560-6, Flanges and their joints — Gaskets for Class-designated flanges — Part 6: Covered serrated
metal gaskets for use with steel flanges
EN 12583, Gas Infrastructure — Compressor stations — Functional requirements
EN 12732, Gas infrastructure — Welding steel pipework — Functional requirements
EN 14141, Valves for natural gas transportation in pipelines — Performance requirements and tests
EN ISO 3183:2019, Petroleum and natural gas industries — Steel pipe for pipeline transportation systems
(ISO 3183:2019)
EN ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
(ISO 6892-1)
EN ISO 12944-1, Paints and varnishes — Corrosion protection of steel structures by protective paint systems
— Part 1: General introduction (ISO 12944-1)
EN ISO 12944-2, Paints and varnishes — Corrosion protection of steel structures by protective paint systems
— Part 2: Classification of environments (ISO 12944-2)
EN ISO 12944-3, Paints and varnishes — Corrosion protection of steel structures by protective paint systems
— Part 3: Design considerations (ISO 12944-3)
EN ISO 12944-4, Paints and varnishes — Corrosion protection of steel structures by protective paint systems
— Part 4: Types of surface and surface preparation (ISO 12944-4)
EN ISO 12944-5, Paints and varnishes — Corrosion protection of steel structures by protective paint systems
— Part 5: Protective paint systems (ISO 12944-5)
EN ISO 12944-6, Paints and varnishes — Corrosion protection of steel structures by protective paint systems
— Part 6: Laboratory performance test methods (ISO 12944-6)
EN ISO 12944-7, Paints and varnishes — Corrosion protection of steel structures by protective paint systems
— Part 7: Execution and supervision of paint work (ISO 12944-7)
EN ISO 12944-8, Paints and varnishes — Corrosion protection of steel structures by protective paint systems
— Part 8: Development of specifications for new work and maintenance (ISO 12944-8)
EN ISO 15741, Paints and varnishes — Friction-reduction coatings for the interior of on- and offshore steel
pipelines for non-corrosive gases (ISO 15741)
EN ISO 15589-1, Petroleum, petrochemical and natural gas industries — Cathodic protection of pipeline
systems — Part 1: On-land pipelines (ISO 15589-1)
EN ISO 21809-1, Petroleum and natural gas industries — External coatings for buried or submerged
pipelines used in pipeline transportation systems — Part 1: Polyolefin coatings (3-layer PE and 3-layer PP)
(ISO 21809-1)
EN ISO 21809-2, Petroleum and natural gas industries — External coatings for buried or submerged
pipelines used in pipeline transportation systems — Part 2: Single layer fusion-bonded epoxy coatings
(ISO 21809-2)
EN ISO 21809-3, Petroleum and natural gas industries — External coatings for buried or submerged
pipelines used in pipeline transportation systems — Part 3: Field joint coatings (ISO 21809-3)
ASME B16.20, Metallic gaskets for pipe flanges
ASME B16.47, Large Diameter Steel Flanges: NPS 26 through NPS 60, Metric/Inch Standard
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/
3.1
abandonment
permanent decommissioning where a pipeline or a pipeline section is physically isolated from the gas
pipeline system
3.2
battery limit
defined boundary between two areas of responsibility, which can be physical or represented by a map
coordinate
Note 1 to entry: Physical boundary can be an isolating valve, a flange on a pipe or a geographic point on a pipeline.
3.3
casing
protection by means of a construction around the pipeline in order to prevent external loads, or third-
party interference
3.4
commissioning
activities required to pressurise pipework, stations, equipment and assemblies with gas and to put them
into operation
3.5
control zone
strip of land along the pipeline over which the pipeline operator has a right to control activities
3.6
decommissioning
activities required to take out of service any pipework, station, equipment or assemblies filled with gas
and to disconnect them from the system
3.7
design factor
f
o
factor applied when calculating minimum wall thickness or design pressure
3.8
desig
...
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