prEN 1594
(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
8. Scope
This EU standard is applicable for transporting gas via onshore high pressure steel pipeline infrastructures where:
- onshore: from the point where the pipeline first crosses what is normally accepted as battery limit between onshore and offshore and 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. This European Standard also applies to a 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: a steel pipeline infrastructure consists of pipeline components such as pipes, valves, couplings and other equipment. Pipeline components in scope are restricted to components made of unalloyed or low alloyed carbon steel and joined by welds, flanges or mechanical couplings.
- gas: non-toxic and non-corrosive natural gas, biomethane gas, hydrogen gas and mixtures of these gasses 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 European Standard begin after the gas producer's metering station. The functional demarcation of the pipeline system within a plant area will be determined from case to case. Generally speaking, this will be directly after the first isolating valve of the metering installation.
This European Standard also describes the mechanical requirements for pipework in stations with a maximum operating pressure greater than 16 bar.
Welding requirements are described in EN 12732. Functional requirements for stations are given in EN 1776, EN 1918-5, EN 12186, and EN 12583. Requirements for safety management and pipeline integrity management are given in EN 17649.
This European Standard specifies common basic principles for gas infrastructures. Users of this European Standard should be aware that there may exist more detailed national standards and codes of practice in the CEN member countries.
This European Standard is intended to be applied in association with these national standards and/or codes of practice setting out the above mentioned principles.
This European Standard does not apply to existing pipelines, in use prior to the publication of this European Standard, nor to modifications to existing pipelines, except for the adaptation of the pipelines for the use of hydrogen and admixtures with hydrogen.
In the event of conflicts in terms of more restrictive requirements in the national legislation/regulation with the requirements of this European Standard, the national legislation/regulation takes precedence as illustrated in CEN/TR 13737 (all parts).
Reference is made in this European Standard to relevant European and other recognised standards for products used to construct and operate gas infrastructures.
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 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. Die funktionale Abgrenzung des Leitungssystems innerhalb eines Anlagenbereichs erfolgt üblicherweise direkt nach der ersten Absperrarmatur der Anlage, kann aber in besonderen Situationen abweichen.
Eine schematische Darstellung eines Leitungssystems für die Gasinfrastruktur ist in Bild 1 enthalten.
Dieses Dokument kann auch für die Wiederverwendung bestehender Rohrleitungen verwendet werden.
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 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. 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.
Infrastruktura za plin - Cevovodni sistemi za najvišjii delovni tlak nad 16 bar - Funkcionalne zahteve
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 1594:2022
01-oktober-2022
Infrastruktura za plin - Cevovodni sistemi za najvišjii delovni tlak nad 16 bar -
Funkcionalne zahteveGas infrastructure - Pipelines for maximum operating pressure over 16 bar - Functional
requirementsGasinfrastruktur - Rohrleitungen für einen maximal zulässigen Betriebsdruck über 16 bar
- Funktionale AnforderungenInfrastructures gazières - Canalisation pour pression maximale de service supérieure à
16 bar - Prescriptions fonctionnellesTa slovenski standard je istoveten z: prEN 1594
ICS:
91.140.40 Sistemi za oskrbo s plinom Gas supply systems
oSIST prEN 1594:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------oSIST prEN 1594:2022
---------------------- Page: 2 ----------------------
oSIST prEN 1594:2022
DRAFT
EUROPEAN STANDARD
prEN 1594
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2022
ICS 23.040.01; 75.200 Will supersede 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 AnforderungenThis draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 234.If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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, Turkey and
United Kingdom.Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1594:2022 E
worldwide for CEN national Members.---------------------- Page: 3 ----------------------
oSIST prEN 1594:2022
prEN 1594:2022 (E)
Contents Page
European foreword ............................................................................................................................................ 5
Introduction .......................................................................................................................................................... 6
1 Scope .......................................................................................................................................................... 7
2 Normative references .......................................................................................................................... 9
3 Terms and definitions ....................................................................................................................... 11
4 Quality and management systems ................................................................................................ 16
5 Safety and the environment ............................................................................................................ 16
5.1 General.................................................................................................................................................... 16
5.2 Appropriate safety measures ......................................................................................................... 17
5.3 Routing considerations ..................................................................................................................... 17
5.3.1 General.................................................................................................................................................... 17
5.3.2 Surveys.................................................................................................................................................... 18
5.3.3 Environmental impact ...................................................................................................................... 18
5.3.4 Ground conditions .............................................................................................................................. 18
5.4 Line valve spacing ............................................................................................................................... 19
6 Pressure safety .................................................................................................................................... 19
6.1 Pressure levels ..................................................................................................................................... 19
6.2 Normal operation ............................................................................................................................... 19
6.3 Requirements for installation of pressure safety devices ................................................... 19
6.4 Pipeline with DP equal to or less than 40 bar and hoop stress ≤ 0,45 R .................... 20
t0,56.5 Pipeline with DP equal to or less than 24 bar and hoop stress ≤ 0,30 R .................... 20
t0,57 Design ...................................................................................................................................................... 21
7.1 General.................................................................................................................................................... 21
7.1.1 Design principles ................................................................................................................................ 21
7.1.2 Basis of design ...................................................................................................................................... 21
7.2 Wall thickness determination ........................................................................................................ 22
7.2.1 Straight pipe ......................................................................................................................................... 22
7.2.2 Bends and elbows ............................................................................................................................... 22
7.3 Additional design requirements ................................................................................................... 23
7.3.1 Forces ...................................................................................................................................................... 23
7.3.2 Soil engineering data required ...................................................................................................... 24
7.3.3 Structural models for pipeline sections...................................................................................... 24
7.4 Analysis of stress and strain ........................................................................................................... 24
7.4.1 Elastic and extended elastic design .............................................................................................. 24
7.4.2 Limit state design ................................................................................................................................ 25
7.5 Design report ........................................................................................................................................ 26
7.6 Land management and geotechnical studies ............................................................................ 28
7.7 Depth of cover ...................................................................................................................................... 28
7.8 Casing pipes .......................................................................................................................................... 28
7.9 Station design ....................................................................................................................................... 29
7.9.1 Layout ...................................................................................................................................................... 29
7.9.2 Components .......................................................................................................................................... 29
7.9.3 Interaction with onshore pipeline section ................................................................................ 30
---------------------- Page: 4 ----------------------oSIST prEN 1594:2022
prEN 1594:2022 (E)
7.9.4 Station pipework ................................................................................................................................ 30
7.10 Pipeline components ......................................................................................................................... 30
7.11 Pigging suitability ............................................................................................................................... 31
7.12 Arrangements for venting, recompression and flaring ........................................................ 31
7.13 Corrosion protection ......................................................................................................................... 31
7.13.1 General ................................................................................................................................................... 31
7.13.2 External coating .................................................................................................................................. 32
7.13.3 Cathodic protection ........................................................................................................................... 32
7.14 Grid connections ................................................................................................................................. 33
8 Materials and components .............................................................................................................. 33
8.1 General ................................................................................................................................................... 33
8.1.1 Base material ....................................................................................................................................... 33
8.1.2 Manufacturing requirements ......................................................................................................... 34
8.1.3 Manufacturing procedure................................................................................................................ 34
8.1.4 Weldability ............................................................................................................................................ 34
8.1.5 Mechanical properties ...................................................................................................................... 35
8.1.6 Inspection documents ....................................................................................................................... 36
8.1.7 Other steel types or grades ............................................................................................................. 36
8.1.8 Records ................................................................................................................................................... 36
8.2 Pipes ........................................................................................................................................................ 36
8.3 Fittings .................................................................................................................................................... 37
8.3.1 General ................................................................................................................................................... 37
8.3.2 Manufacturing...................................................................................................................................... 37
8.4 Flanged connections .......................................................................................................................... 37
8.5 Insulating connections ...................................................................................................................... 37
8.5.1 Type test ................................................................................................................................................. 37
8.5.2 Strength test ......................................................................................................................................... 37
8.5.3 Electrical test ........................................................................................................................................ 37
8.5.4 External tightness test ...................................................................................................................... 37
8.6 Valves ...................................................................................................................................................... 38
8.7 External and internal coatings ....................................................................................................... 38
8.8 Welding end preparation ................................................................................................................. 38
9 Construction ......................................................................................................................................... 38
9.1 General ................................................................................................................................................... 38
9.2 Execution of work ............................................................................................................................... 38
9.2.1 General ................................................................................................................................................... 38
9.2.2 Marking out the site ........................................................................................................................... 38
9.2.3 Initial site inspections ....................................................................................................................... 39
9.2.4 Working strip ....................................................................................................................................... 39
9.2.5 Separation of topsoil ......................................................................................................................... 39
9.2.6 Trenches ................................................................................................................................................ 39
9.2.7 Crossing and proximity of buried structures (cables and pipes) ...................................... 40
9.2.8 Handling and stringing ..................................................................................................................... 40
9.2.9 Bends ....................................................................................................................................................... 40
9.2.10 Welding and weld examination ..................................................................................................... 41
9.2.11 External coating .................................................................................................................................. 41
9.2.12 Lowering into the trench ................................................................................................................. 44
9.2.13 Ballasting, anchoring ......................................................................................................................... 44
9.2.14 Tie-ins ..................................................................................................................................................... 44
9.2.15 Backfill .................................................................................................................................................... 44
9.2.16 Reinstatement ...................................................................................................................................... 45
---------------------- Page: 5 ----------------------oSIST prEN 1594:2022
prEN 1594:2022 (E)
9.2.17 Markings ................................................................................................................................................ 45
9.2.18 Final site inspection with owners and users ............................................................................. 45
9.3 Special crossings ................................................................................................................................. 45
9.3.1 General.................................................................................................................................................... 45
9.3.2 Open-trench road or path crossings ............................................................................................ 46
9.3.3 Trenchless crossings ......................................................................................................................... 46
9.3.4 Requirements for casings ................................................................................................................ 49
9.3.5 Open trench major water crossings ............................................................................................. 49
9.3.6 Horizontal directional drilling ....................................................................................................... 50
9.4 Cleaning .................................................................................................................................................. 51
9.5 Testing .................................................................................................................................................... 51
9.5.1 General.................................................................................................................................................... 51
9.5.2 Test preparation ................................................................................................................................. 51
9.5.3 Strength test .......................................................................................................................................... 51
9.5.4 Tightness test ....................................................................................................................................... 52
9.5.5 Pre-testing ............................................................................................................................................. 52
9.5.6 Dewatering ............................................................................................................................................ 52
9.5.7 Golden welds ........................................................................................................................................ 52
9.6 Acceptance............................................................................................................................................. 53
9.6.1 As-built documents ............................................................................................................................ 53
9.6.2 Precommissioning .............................................................................................................................. 53
9.6.3 Handover and documentation ....................................................................................................... 53
10 Operation and maintenance ........................................................................................................... 53
10.1 General.................................................................................................................................................... 53
10.1.1 Policy ....................................................................................................................................................... 53
10.1.2 Safety and environment ................................................................................................................... 54
10.2 Organization ......................................................................................................................................... 54
10.3 Operating and maintenance instructions .................................................................................. 54
10.4 Emergency plan ................................................................................................................................... 55
10.5 Records and documentation ........................................................................................................... 56
10.6 Commissioning .................................................................................................................................... 56
10.7 Decommissioning ............................................................................................................................... 56
10.8 Recommissioning ................................................................................................................................ 56
10.9 Maintenance, modification, and repair ....................................................................................... 56
10.9.1 General.................................................................................................................................................... 56
10.9.2 Pipeline surveillance, inspection and monitoring .................................................................. 57
10.9.3 Execution of repairs and modifications ...................................................................................... 58
10.9.4 Work involving cutting of the pipeline ....................................................................................... 58
10.9.5 Work on in-service pipelines .......................................................................................................... 58
10.9.6 Repairs after emergency .................................................................................................................. 58
10.9.7 Other and special maintenance activities .................................................................................. 58
10.10 Conversion existing natural gas pipelines for transmission of hydrogen ...................... 60
10.11 Abandonment and removal ............................................................................................................. 60
Annex A (normative) Requirements for fracture arrest of line pipe ............................................ 61
Annex B (informative) Hydrogen pipelines ............................................................................................ 66
Bibliography ....................................................................................................................................................... 68
---------------------- Page: 6 ----------------------oSIST prEN 1594:2022
prEN 1594:2022 (E)
European foreword
This document (prEN 1594:2022) has been prepared by Technical Committee CEN/TC 234 “Gas
infrastructure”, the secretariat of which is held by DIN.This document is currently submitted to the CEN Enquiry.
This document will supersede EN 1594:2013.
The main changes between this document and the previous edition 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).
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.---------------------- Page: 7 ----------------------
oSIST prEN 1594:2022
prEN 1594:2022 (E)
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.---------------------- Page: 8 ----------------------
oSIST prEN 1594:2022
prEN 1594:2022 (E)
1 Scope
This document describes the functional requirements for pipelines for m
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.