Gas infrastructure - Pipelines for maximum operating pressure over 16 bar - Functional requirements

This European Standard is applicable to pipelines with a maximum operating pressure (MOP) over 16 bar for the carriage of processed, non-toxic and non-corrosive natural gas according to EN ISO 13686 in onland gas infrastructure. This European Standard is also applicable to pipelines with a maximum operating pressure (MOP) over 16 bar for the carriage of non-conventional gases such as injected biomethane, complying with EN ISO 13686 and for which a detailed technical evaluation of the functional requirements is performed ensuring there are no other constituents or properties of the gases that can affect the integrity of the pipeline. Onland gas infrastructure is where: - pipeline elements are made of unalloyed or low-alloyed carbon steel; - pipeline elements are joined by welds, flanges or mechanical couplings; - the pipeline 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; - the design temperature of the system is between -40 °C and 120 °C inclusive. This European Standard applies to onshore pipeline systems from the point where the pipeline first crosses what is normally accepted as battery limit between on and offshore, e.g.: - first isolation valve; - the base of steep sea shelf; - above the high water/low water mark onto mainland; - an island. 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. 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. 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 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 a special application standard on welding for gas infrastructures EN 12732. Functional requirements for stations are given in: EN 1776, Gas supply systems - Natural gas measuring stations - Functional requirements EN 1918-5, Gas supply systems - Underground gas storage - Part 5: Functional recommendations for surface facilities EN 12186, Gas supply systems - Gas pressure regulating stations for transmission and distribution - Functional requirements EN 12583, Gas supply systems - Compressor stations - Functional requirements

Gasversorgungssysteme - Rohrleitungen für einen maximal zulässigen Betriebsdruck über 16 bar - Funktionale Anforderungen

Diese Europäische Norm gilt für Leitungen mit einem maximal zulässigen Betriebsdruck (MOP) im Bereich von über 16 bar, die für den Transport von aufbereitetem, nicht giftigem und nicht korrosivem Erdgas nach EN ISO 13686 für die landgestützte Gasinfrastruktur bestimmt sind.
Diese Europäische Norm gilt auch für Rohrleitungen mit einem maximal zulässigen Betriebsdruck (MOP) größer 16 bar für den Transport von nicht-konventionellen Gasen wie eingespeistes Biomethan entsprechend der EN ISO 13686 und für die Durchführung einer detaillierten technischen Bewertung der funktionalen Anforderungen, um sicherzustellen, dass keine anderen Bestandteile oder Eigenschaften der Gase, die Integrität der Leitung beeinträchtigen können.
Bei der landgestützten Gasinfrastruktur:
-   bestehen die Leitungsbauteile aus nicht legiertem oder niedrig legiertem Kohlenstoffstahl;
-   sind die Leitungsbauteile durch Schweißnähte, Flansche oder mechanische Rohrverbindungen miteinander verbunden;
-   sind alle Leitungen und Anlagen, die sich auf Gewerbe- oder Werksgelände befinden, ausschließlich der Versorgung solcher Grundstücke dienen und kein wesentlicher Bestandteil der Anlagen für Betriebsabläufe auf diesem Gelände;
-   liegt die Auslegungstemperatur zwischen 40 °C und 120 °C.
Diese Europäische Norm gilt für landgestützte Leitungssysteme, und zwar ab der Stelle, an der die Rohrleitung zuerst die als Grenze (Battery-Limit) zwischen ablandigen (offshore) und auflandigen (onshore) Rohrleitungsabschnitten anerkannte Stelle kreuzt, z. B.:
-   die erste Absperrarmatur;
-   den Fußpunkt eines steilen Festlandsockels;
-   über der Flut-/Ebbemarke auf dem Festland;
-   eine Insel.
Diese Europäische Norm gilt auch für auf dem Festland ihren Ausgang nehmende Leitungssysteme sowie für Teile von Leitungssystemen auf dem Festland, die nachfolgend durch Fjorde, Seen usw. verlaufen.
Diese Europäische Norm gilt nicht für Leitungssysteme und deren Änderungen, die vor Veröffentlichung dieser Norm in Betrieb genommen wurden.
Die Gasinfrastruktur, für die diese Norm gilt, beginnt am Ausgang der Messstation des Gasproduzenten. Die funktionale Abgrenzung zwischen dem Leitungssystem für den Gastransport und den Stationsleitungen wird im Einzelfall festgelegt. Im Allgemeinen wird das direkt nach der ersten Absperrarmatur der Anlage sein.
Diese Europäische Norm legt darüber hinaus die mechanischen Anforderungen an Rohrleitungen in Stationen mit einem maximal zulässigen Betriebsdruck von mehr als 16 bar fest. Die Anforderungen für das Schweißen sind in der gesonderten Anwendungsnorm für das Schweißen in Gasinfrastrukturen EN 12732 festgelegt. Funktionale Anforderungen für Stationen ergeben sich aus dem folgenden Regelwerk:
EN 1776, Gasversorgung — Erdgasmessanlagen — Funktionale Anforderungen
EN 1918-5, Gasversorgungssysteme — Untertagespeicherung von Gas — Teil 5: Funktionale Empfehlungen für die Obertageanlagen
EN 12186, Gasversorgungssysteme — Gas-Druckregelanlagen für Gastransport und -verteilung — Funktio¬nale Anforderungen
EN 12583, Gasversorgungssysteme — Verdichterstationen — Funktionale Anforderungen
Diese Europäische Norm enthält allgemeine Grundsätze für Gasinfrastrukturen. Anwender dieser Europäischen Norm sollten sich dessen bewusst sein, dass detaillierte nationale Normen und Verfahrens-regeln in den CEN-Mitgliedstaaten existieren können.
Diese Europäische Norm sollte in Verbindung mit diesen, die oben erwähnten allgemeinen Grundsätze darlegenden nationalen Normen und/oder Technischen Regeln angewendet werden.
Beim Auftreten von Widersprüchen aufgrund restriktiverer Anforderungen in nationalen Gesetzen/Vorschriften als in dieser Norm gefordert, haben nationale Gesetze/Vorschriften Vorrang, wie in CEN/TR 13737 (alle Teile) dargestellt.

Systèmes d'alimentation en gaz - Canalisations pour pression maximale de service supérieure à 16 bar - Prescriptions fonctionnelles

La présente norme s'applique aux canalisations utilisées sous une pression maximale de service (MOP) supérieure à 16 bar pour le transport de gaz naturel traité non toxique et non corrosif conformément à l'EN ISO 13686 dans des systèmes d'alimentation en gaz terrestres.
La présente Norme européenne est également applicable aux canalisations avec une pression maximale de service (MOP) supérieure à 16 bar pour le transport de gaz non conventionnels tels que le biométhane injecté, conforme à l'EN ISO 13686 et pour lesquels une évaluation technique détaillée des exigences fonctionnelles est effectuée pour s'assurer qu'il n'y a pas d'autres composants ou propriétés des gaz qui puissent nuire à l'intégrité des canalisations.
Les systèmes d'alimentation en gaz terrestres sont :
-   les éléments de canalisations sont en acier non ou faiblement allié ;
-   les éléments de canalisations sont réunis par des soudures, des brides ou des assemblages mécaniques ;
-   les canalisations ne sont pas situées sur des sites industriels, ou commerciaux en tant que partie intégrante du procédé industriel, exception faite des canalisations et dispositifs alimentant de tels sites ;
-   la température de conception du réseau est comprise entre - 40 °C et 120 °C inclus.
La présente Norme européenne s’applique aux canalisations terrestres depuis le point où la canalisation traverse d’abord ce qui est normalement accepté comme périmètre des installations entre terrestre et maritime, par exemple :
-   première vanne de sectionnement ;
-   la base de la partie abrupte du plateau continental ;
-   au-dessus de la marque marée haute/marée basse sur le continent ;
-   une ile.
La présente Norme européenne s’applique aussi à un système de canalisations avec un point de départ terrestre, même quand des parties du système de canalisations sur le continent traversent postérieurement des fjords, des lacs, etc.
La présente Norme européenne ne s’applique pas aux canalisations existantes mises en service avant la publication de la présente norme, ni aux modifications de ces canalisations existantes.
Les systèmes d’alimentation en gaz couverts par la présente norme commencent après le poste de comptage du producteur de gaz. La limite fonctionnelle d'un tel système à l'intérieur de la station sera définie cas par cas. D'une manière générale, elle se situe juste après le premier robinet d’isolement de l'installation.
La présente Norme européenne décrit également les prescriptions mécaniques des canalisations des postes sous pression maximale de service (MOP) supérieure à 16 bar. Les prescriptions relatives au soudage sont décrites dans une norme d'application spécifique relative au soudage pour les systèmes d'alimentation en gaz EN 12732. Les prescriptions fonctionnelles des stations sont mentionnées dans :
-   EN 1776, Alimentation en gaz – Postes de comptage de gaz naturel – Prescriptions fonctionnelles
-   EN 1918-5, Systèmes d’alimentation en gaz - Stockage souterrain de gaz - Partie 5 : Recommandations fonctionnelles pour les installations de surface
-   EN 12186, Systèmes d'alimentation en gaz - Postes de détente-régulation de pression de gaz pour le transport et la distribution - Prescriptions fonctionnelles
-   EN 12583, Systèmes d'alimentation en gaz - Stations de compression - Prescriptions fonctionnelles
La présente Norme européenne 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.
La présente Norme européenne est destinée à être appliquée conjointement avec ces normes nationales et/ou codes de pratique qui détaillent les principes précités.

Infrastruktura za plin - Cevovodni sistemi za najvišjii delovni tlak nad 16 bar - Funkcionalne zahteve

Ta evropski standard se uporablja za cevovode z najvišjim delovnim tlakom (MOP) nad 16 bari za prenos obdelanega, nestrupenega in nekorozivnega zemeljskega plina s plinsko infrastrukturo na kopnem v skladu s standardom EN ISO 13686. Ta evropski standard se uporablja tudi za cevovode z najvišjim delovnim tlakom nad 16 bari za prenos nekonvencionalnih plinov, npr. za vbrizgani biometan, v skladu s standardom EN ISO 13686, za katere se izvede podrobno tehnično vrednotenje funkcionalnih zahtev, ki zagotavlja, da plini nimajo drugih sestavin ali lastnosti, ki lahko vplivajo na neoporečnost cevovoda. Kopenska infrastruktura za plin se uporablja, kjer: – so elementi cevovoda izdelani iz nelegiranega ali malo legiranega ogljikovega jekla; – so elementi cevovoda zvarjeni, združeni s prirobnicami ali mehanskimi spoji; – cevovod ni nameščen znotraj poslovnih ali industrijskih prostorov kot sestavni del industrijskega postopka na teh prostorih, razen za cevovode in opremo za dostavo plina na ta območja; – je projektna temperatura sistema med –40 °C do vključno 120 °C. Ta evropski standard se uporablja za kopenske cevovodne sisteme od točke, kjer cevovod prvič prečka točko, ki se običajno šteje kot razmejitev med kopenskim in morskim delom cevovoda, npr.: – prvi ločilni ventil; – dno strmega morskega šelfa; – točka nad oznako za linijo visoke/nizke vode na kopno; – otok. Ta evropski standard se uporablja za cevovodne sisteme z izhodiščem na kopnem, tudi kadar cevovodni sistem na kopnem prečka fjorde, jezera itd. Ta evropski standard se ne uporablja za obstoječe cevovode, ki so bili v uporabi pred objavo tega evropskega standarda, ali za spremembe obstoječih cevovodov. 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 napeljave. Ta evropski standard opisuje tudi mehanske zahteve za cevovode v plinskih postajah z najvišjim delovnim tlakom nad 16 bari. Zahteve za varjenje so opisane v standardu EN 12732 za posebno uporabo glede varjenja za plinsko infrastrukturo. Funkcionalne zahteve za postaje so navedene v standardu: EN 1776, Sistemi oskrbe s plinom – Merilne naprave za zemeljski plin – Funkcionalne zahteve EN 1918-5, Sistemi oskrbe s plinom - Podzemna plinska skladišča - 5. del: Funkcionalna priporočila za nadzemno opremo EN 12186, Sistemi oskrbe s plinom - Plinske postaje za regulacijo tlaka za transport in distribucijo - Funkcionalne zahteve EN 12583, Sistemi oskrbe s plinom - Kompresorske postaje - Funkcionalne zahteve.

General Information

Status
Published
Public Enquiry End Date
19-May-2013
Publication Date
21-Nov-2013
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
23-Oct-2013
Due Date
28-Dec-2013
Completion Date
22-Nov-2013

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Infrastruktura za plin - Cevovodni sistemi za najvišjii delovni tlak nad 16 bar - Funkcionalne zahteveGasversorgungssysteme - Rohrleitungen für einen maximal zulässigen Betriebsdruck über 16 bar - Funktionale AnforderungenSystèmes d'alimentation en gaz - Canalisations pour pression maximale de service supérieure à 16 bar - Prescriptions fonctionnellesGas infrastructure - Pipelines for maximum operating pressure over 16 bar - Functional requirements91.140.40Sistemi za oskrbo s plinomGas supply systemsICS:Ta slovenski standard je istoveten z:EN 1594:2013SIST EN 1594:2013en,fr,de01-december-2013SIST EN 1594:2013SLOVENSKI

STANDARDSIST EN 1594:20091DGRPHãþD
SIST EN 1594:2013
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1594
September 2013 ICS 23.040.01; 75.200 Supersedes EN 1594:2009English Version

Gas infrastructure - Pipelines for maximum operating pressure over 16 bar - Functional requirements

Infrastructures gazières - Canalisation pour pression maximale de service supérieure à 16 bar - Prescriptions fonctionnelles

Gasinfrastruktur - Rohrleitungen für einen maximal zulässigen Betriebsdruck über 16 bar - Funktionale Anforderungen This European Standard was approved by CEN on 18 July 2013.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,

B-1000 Brussels © 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1594:2013: ESIST EN 1594:2013

EN 1594:2013 (E) 2 Contents Page Foreword ....................................................................................................................................................... 5 Introduction .................................................................................................................................................. 6 1 Scope ................................................................................................................................................ 7 2 Normative references ..................................................................................................................... 10 3 Terms, definitions, symbols and abbreviations ............................................................................ 11 4 Quality and management systems ................................................................................................ 16 5 Safety and the environment ........................................................................................................... 16 5.1 General ........................................................................................................................................... 16 5.2 Appropriate safety measures ........................................................................................................ 16 5.3 Routing considerations ................................................................................................................. 17 5.4 Line valve spacing ......................................................................................................................... 18 6 Pressure safety .............................................................................................................................. 18 6.1 Pressure levels ............................................................................................................................... 18 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 equal to or less than 0,45 Rt 0,5 ......................................................................................................................................... 19 6.5 Pipeline with DP equal to or less than 24 bar and hoop stress equal to or less than 0,30 Rt 0,5 ......................................................................................................................................... 19 7 Design ............................................................................................................................................. 20 7.1 General ........................................................................................................................................... 20 7.2 Wall thickness determination ........................................................................................................ 21 7.3 Additional design requirements .................................................................................................... 22 7.4 Analysis of stress and strain ......................................................................................................... 24 7.5 Design report .................................................................................................................................. 26 7.6 Land management and geotechnical studies ............................................................................... 27 7.7 Depth of cover ................................................................................................................................ 27 7.8 Casing pipes ................................................................................................................................... 28 7.9 Station design ................................................................................................................................ 28 7.10 Pipeline components ..................................................................................................................... 30 7.11 Pigging suitability .......................................................................................................................... 30 7.12 Arrangements for venting .............................................................................................................. 30 7.13 Corrosion protection ...................................................................................................................... 31 7.14 Grid connections ............................................................................................................................ 33 8 Materials and components ............................................................................................................ 33 8.1 General ........................................................................................................................................... 33 8.2 Pipes ............................................................................................................................................... 37 8.3 Fittings ............................................................................................................................................ 37 8.4 Flanged connections ..................................................................................................................... 37 8.5 Insulating connections .................................................................................................................. 38 8.6 Valves ............................................................................................................................................. 38 8.7 External and internal coatings ....................................................................................................... 38 8.8 End preparation .............................................................................................................................. 38 9 Construction ................................................................................................................................... 38 9.1 General ........................................................................................................................................... 38 9.2 Execution of work .......................................................................................................................... 39 SIST EN 1594:2013

EN 1594:2013 (E) 3 9.3 Special crossings ........................................................................................................................... 46 9.4 Cleaning .......................................................................................................................................... 50 9.5 Testing ............................................................................................................................................ 51 9.6 Acceptance ..................................................................................................................................... 52 10 Operation and maintenance ........................................................................................................... 53 10.1 General ........................................................................................................................................... 53 10.2 Organisation ................................................................................................................................... 54 10.3 Operating and maintenance instructions ...................................................................................... 54 10.4 Emergency plan .............................................................................................................................. 55 10.5 Records and documentation.......................................................................................................... 55 10.6 Commissioning .............................................................................................................................. 56 10.7 Decommissioning........................................................................................................................... 56 10.8 Recommissioning........................................................................................................................... 56 10.9 Maintenance, modification and repair ........................................................................................... 56 10.10 Abandonment ................................................................................................................................. 59 Annex A (informative)

Settlement areas ..................................................................................................... 60 A.1 General ........................................................................................................................................... 60 A.2 Procedure ....................................................................................................................................... 60 A.3 Construction settlement ................................................................................................................ 60 A.4 Strength calculation ....................................................................................................................... 61 A.5 Monitoring ...................................................................................................................................... 65 A.6 Action in the event of the allowable/limit values being exceeded ............................................... 65 A.7 Bibliography ................................................................................................................................... 65 Annex B (informative)

Mining subsidence ................................................................................................. 66 B.1 General ........................................................................................................................................... 66 B.2 Procedure ....................................................................................................................................... 66 B.3 Strength calculation ....................................................................................................................... 66 B.4 Action in the event of the allowable/limit values being exceeded ............................................... 67 B.5 Monitoring ...................................................................................................................................... 67 B.6 Bibliography ................................................................................................................................... 67 Annex C (informative)

Frost heave ............................................................................................................. 68 C.1 General ........................................................................................................................................... 68 C.2 Procedure ....................................................................................................................................... 68 C.3 Strength calculation ....................................................................................................................... 68 C.4 Other possible measures ............................................................................................................... 68 C.5 Bibliography ................................................................................................................................... 69 Annex D (informative)

Landslide areas ...................................................................................................... 70 D.1 General ........................................................................................................................................... 70 D.2 Procedure ....................................................................................................................................... 70 D.3 Strength calculation ....................................................................................................................... 71 D.4 Possible action to prevent the allowable/limit values being exceeded........................................ 71 D.5 Monitoring ...................................................................................................................................... 72 D.6 Bibliography ................................................................................................................................... 72 SIST EN 1594:2013

EN 1594:2013 (E) 4 Annex E (informative)

Areas with high seismic risk .................................................................................. 74 E.1 General ........................................................................................................................................... 74 E.2 Procedure ....................................................................................................................................... 74 E.3 Strength calculation ....................................................................................................................... 75 E.4 Bibliography ................................................................................................................................... 76 Annex F (informative)

Soil mechanics parameters .................................................................................... 78 F.1 Parameters ..................................................................................................................................... 78 F.2 Soil engineering study ................................................................................................................... 79 F.3 Bibliography ................................................................................................................................... 79 Annex G (informative)

Bored/jacked crossings ......................................................................................... 81 G.1 General ........................................................................................................................................... 81 G.2 Strength calculation ....................................................................................................................... 81 G.3 Bibliography ................................................................................................................................... 85 Annex H (informative)

Allowable pulsation and vibration levels .............................................................. 86 H.1 Introduction .................................................................................................................................... 86 H.2 Pulsations ....................................................................................................................................... 86 H.3 Pipe vibrations ............................................................................................................................... 86 H.4 Induced effects ............................................................................................................................... 87 H.5 Bibliography ................................................................................................................................... 87 Annex I (informative)

Allowable vibration levels from construction work - blasting ............................... 88 I.1 General ........................................................................................................................................... 88 I.2 Procedure ....................................................................................................................................... 88 I.3 Strength calculation ....................................................................................................................... 88 I.4 Bibliography ................................................................................................................................... 90 Annex J (informative)

Significant technical changes between this European Standard and the previous edition ............................................................................................................................. 91 Bibliography................................................................................................................................................ 93

SIST EN 1594:2013

EN 1594:2013 (E) 5 Foreword This document (EN 1594:2013) 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 March 2014, and conflicting national standards shall be withdrawn at the latest by March 2014. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 1594:2009. Annex J provides details of significant technical changes between this European Standard and the previous edition. 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. Compliance to this standard 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 are also in the scope of CEN/TC 234 standardization. In this respect, CEN/TC 234 evaluated the indicated EU legislation and amended this technical standard accordingly, where required and appropriate. A list of the relevant functional standards prepared by CEN/TC 234 is included in Clause 2 and the Bibliography of this document. CEN/TC 234 will continue its work updating this European Standard to the latest developments at regular intervals. In preparing this European Standard, 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 recognised standards of gas engineering and specific requirements imposed by legal structures of these member countries. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

SIST EN 1594:2013

EN 1594:2013 (E) 6 Introduction This European Standard describes the general functional requirements for gas supply through pipe systems and covers the pressure range greater than 16 bar maximum operating pressure (MOP) 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 European Standard 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 European Standard. Managers with responsibilities for the design, construction and operation of gas infrastructure will have regard to the guidance given in this European Standard 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 European Standard 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 European Standard. In preparing this European Standard it was recognised that the suite of relevant European Standards is incomplete. Reference may be made where appropriate to international, national or other standards until relevant European Standards are available. SIST EN 1594:2013

EN 1594:2013 (E) 7 1 Scope This European Standard is applicable to pipelines with a maximum operating pressure (MOP) over 16 bar for the carriage of processed, non-toxic and non-corrosive natural gas according to EN ISO 13686 in onland gas infrastructure. This European Standard is also applicable to pipelines with a maximum operating pressure (MOP) over 16 bar for the carriage of non-conventional gases such as injected biomethane, complying with EN ISO 13686 and for which a detailed technical evaluation of the functional requirements is performed ensuring there are no other constituents or properties of the gases that can affect the integrity of the pipeline. Onland gas infrastructure is where: — pipeline elements are made of unalloyed or low-alloyed carbon steel; — pipeline elements are joined by welds, flanges or mechanical couplings; — the pipeline 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; — the design temperature of the system is between −40 °C and 120 °C inclusive. This European Standard applies to onshore pipeline systems from the point where the pipeline first crosses what is normally accepted as battery limit between on and offshore, e.g.: — first isolation valve; — the base of steep sea shelf; — above the high water/low water mark onto mainland; — an island. 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. 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. 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 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 a special application standard on welding for gas infrastructures EN 12732. Functional requirements for stations are given in:  EN 1776, Gas supply systems — Natural gas measuring stations — Functional requirements  EN 1918-5, Gas supply systems — Underground gas storage — Part 5: Functional recommendations for surface facilities  EN 12186, Gas supply systems — Gas pressure regulating stations for transmission and distribution — Functional requirements  EN 12583, Gas supply systems — Compressor stations — Functional requirements SIST EN 1594:2013

EN 1594:2013 (E) 8 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. 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). NOTE CEN/TR 13737 (all parts) contains:  clarification of relevant legislation/regulations applicable in a country;  if appropriate, more restrictive national requirements;  national contact point for the latest information. Reference is made in this European Standard to relevant European and other recognised standards for products used to construct and operate gas infrastructures. A schematic representation of pipelines for gas transmission is given in Figure 1. SIST EN 1594:2013

EN 1594:2013 (E) 9
Key Symbols
Stations
pipelines covered by this standard
1 P – well, production
pipelines not covered by this standard
2 T – treatment
pressure regulation
3 D – odorisation
pressure safety system
4 S 1 – gas receiving
metering system
5 S 2 – valve station
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
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 SIST EN 1594:2013

EN 1594:2013 (E) 10 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1515-3, Flanges and their joints — Bolting — Part 3: Classification of bolt materials for steel flanges, class designated 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 ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature (ISO 6892-1

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Gasversorgungssysteme - Rohrleitungen für einen maximal zulässigen Betriebsdruck über 16 bar - Funktionale AnforderungenSystèmes d'alimentation en gaz - Canalisations pour pression maximale de service supérieure à 16 bar - Prescriptions fonctionnellesGas infrastructure - Pipelines for maximum operating pressure over 16 bar - Functional requirements91.140.40Sistemi za oskrbo s plinomGas supply systemsICS:Ta slovenski standard je istoveten z:FprEN 1594kSIST FprEN 1594:2013en,fr,de01-april-2013kSIST FprEN 1594:2013SLOVENSKI

STANDARD
kSIST FprEN 1594:2013
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
FINAL DRAFT
FprEN 1594
January 2013 ICS 23.040.01; 75.200 Will supersede EN 1594:2009English Version

Gas infrastructure - Pipelines for maximum operating pressure over 16 bar - Functional requirements

Systèmes d'alimentation en gaz - Canalisations pour pression maximale de service supérieure à 16 bar - Prescriptions fonctionnelles

Gasversorgungssysteme - Rohrleitungen für einen maximal zulässigen Betriebsdruck über 16 bar - Funktionale Anforderungen This draft European Standard is submitted to CEN members for unique acceptance procedure. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, 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
Management Centre:
Avenue Marnix 17,

B-1000 Brussels © 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. FprEN 1594:2013: EkSIST FprEN 1594:2013

FprEN 1594:2013 (E) 2 Contents Page Foreword ..............................................................................................................................................................6 Introduction .........................................................................................................................................................7 1 Scope ......................................................................................................................................................8 2 Normative references ......................................................................................................................... 10 3 Terms, definitions, symbols and abbreviations .............................................................................. 12 4 Quality and management systems.................................................................................................... 16 5 Safety and the environment ............................................................................................................... 17 5.1 General ................................................................................................................................................. 17 5.2 Appropriate safety measures ............................................................................................................ 17 5.3 Routing considerations ...................................................................................................................... 18 5.3.1 General ................................................................................................................................................. 18 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 ............................................................. 20 6.4 Pipeline with DP equal to or less than 40 bar and hoop stress equal to or less than 0,45 Rt 0,5 ............................................................................................................................................... 20 6.5 Pipeline with DP equal to or less than 24 bar and hoop stress equal to or less than 0,30 Rt 0,5 ............................................................................................................................................... 20 7 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 .............................................................................................................................. 23 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 ............................................................................................................. 25 7.4.1 Elastic and extended elastic design ................................................................................................. 25 7.4.2 Limit state design ............................................................................................................................... 26 7.5 Design report ....................................................................................................................................... 27 7.6 Land management and geotechnical studies .................................................................................. 28 7.7 Depth of cover ..................................................................................................................................... 28 7.8 Casing pipes ........................................................................................................................................ 29 7.9 Station design ..................................................................................................................................... 29 7.9.1 Layout .................................................................................................................................................. 29 7.9.2 Components ........................................................................................................................................ 30 7.9.3 Interaction with onland pipeline section .......................................................................................... 30 7.9.4 Station pipework ................................................................................................................................. 31 7.10 Pipeline components .......................................................................................................................... 31 7.11 Pigging suitability ............................................................................................................................... 31 7.12 Arrangements for venting .................................................................................................................. 31 kSIST FprEN 1594:2013

FprEN 1594:2013 (E) 3 7.13 Corrosion protection ........................................................................................................................... 32 7.13.1 General ................................................................................................................................................. 32 7.13.2 External coating ................................................................................................................................... 32 7.13.3 Cathodic protection ............................................................................................................................. 33 7.14 Grid connections ................................................................................................................................. 34 8 Materials and components ................................................................................................................. 34 8.1 General requirements ......................................................................................................................... 34 8.1.1 Base material ....................................................................................................................................... 34 8.1.2 Manufacturing ...................................................................................................................................... 34 8.1.3 Weldability ............................................................................................................................................ 34 8.1.4 Mechanical properties......................................................................................................................... 35 8.1.5 Inspection documents ........................................................................................................................ 37 8.1.6 Other steel types or grades ................................................................................................................ 37 8.1.7 Records ................................................................................................................................................ 37 8.2 Pipes ..................................................................................................................................................... 37 8.3 Fittings .................................................................................................................................................. 37 8.3.1 General ................................................................................................................................................. 37 8.3.2 Manufacturing ...................................................................................................................................... 38 8.4 Flanged connections ........................................................................................................................... 38 8.5 Insulating connections ....................................................................................................................... 38 8.5.1 Type test ............................................................................................................................................... 38 8.5.2 Strength test ........................................................................................................................................ 38 8.5.3 Electrical test ....................................................................................................................................... 38 8.5.4 External tigthness test ........................................................................................................................ 39 8.6 Valves ................................................................................................................................................... 39 8.7 External and internal coatings ........................................................................................................... 39 8.8 End preparation ................................................................................................................................... 39 9 Construction ........................................................................................................................................ 39 9.1 General ................................................................................................................................................. 39 9.2 Execution of work ................................................................................................................................ 39 9.2.1 General ................................................................................................................................................. 39 9.2.2 Marking out the site ............................................................................................................................. 39 9.2.3 Initial site inspections ......................................................................................................................... 40 9.2.4 Working strip ....................................................................................................................................... 40 9.2.5 Separation of topsoil ........................................................................................................................... 40 9.2.6 Trenches ............................................................................................................................................... 40 9.2.7 Crossing and proximity of buried structures (cables and pipes) .................................................. 41 9.2.8 Handling and stringing ....................................................................................................................... 41 9.2.9 Bends .................................................................................................................................................... 41 9.2.10 Welding and weld examination .......................................................................................................... 42 9.2.11 External coating ................................................................................................................................... 42 9.2.12 Lowering into the trench..................................................................................................................... 44 9.2.13 Ballasting, anchoring .......................................................................................................................... 45 9.2.14 Tie-ins ................................................................................................................................................... 45 9.2.15 Backfill .................................................................................................................................................. 45 9.2.16 Reinstatement ...................................................................................................................................... 45 9.2.17 Markings ............................................................................................................................................... 46 9.2.18 Final site inspection with owners and users .................................................................................... 46 9.3 Special crossings ................................................................................................................................ 46 9.3.1 General ................................................................................................................................................. 46 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 (HDD) ................................................................................................. 49 9.4 Cleaning ............................................................................................................................................... 50 9.5 Testing .................................................................................................................................................. 51 9.5.1 General ................................................................................................................................................. 51 9.5.2 Test preparation .................................................................................................................................. 51 kSIST FprEN 1594:2013

FprEN 1594:2013 (E) 4 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 .......................................................................................................................................... 52 9.6.1 As built records ................................................................................................................................... 52 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 Organisation ........................................................................................................................................ 54 10.3 Operating and maintenance instructions ......................................................................................... 54 10.4 Emergency plan .................................................................................................................................. 55 10.5 Records and documentation ............................................................................................................. 55 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 ........................................................................... 56 10.9.3 Execution of repairs and modifications ........................................................................................... 57 10.9.4 Work involving cutting of the pipeline.............................................................................................. 57 10.9.5 Work on in-service pipelines ............................................................................................................. 57 10.9.6 Repairs after Emergency ................................................................................................................... 58 10.9.7 Other and special maintenance activities ........................................................................................ 58 10.10 Abandonment ...................................................................................................................................... 59 Annex A (informative)

Settlement areas ........................................................................................................ 60 A.1 General ................................................................................................................................................. 60 A.2 Procedure ............................................................................................................................................ 60 A.3 Construction settlement .................................................................................................................... 60 A.4 Strength calculation ........................................................................................................................... 61 A.4.1 Interaction between pipe and soil: pipeline considered as beam ................................................. 62 A.4.2 Simplified calculation method ........................................................................................................... 63 A.5 Monitoring ........................................................................................................................................... 65 A.6 Action in the event of the allowable/limit values being exceeded ................................................. 65 A.7 Bibliography ........................................................................................................................................ 65 Annex B (informative)

Mining subsidence ..................................................................................................... 66 B.1 General ................................................................................................................................................. 66 B.2 Procedure ............................................................................................................................................ 66 B.3 Strength calculation ........................................................................................................................... 66 B.4 Action in the event of the allowable/limit values being exceeded ................................................. 67 B.5 Monitoring ........................................................................................................................................... 67 B.6 Bibliography ........................................................................................................................................ 67 Annex C (informative)

Frost heave ................................................................................................................. 68 C.1 General ................................................................................................................................................. 68 C.2 Procedure ............................................................................................................................................ 68 C.3 Strength calculation ........................................................................................................................... 68 C.4 Other possible measures ................................................................................................................... 68 C.5 Bibliography ........................................................................................................................................ 69 Annex D (informative)

Landslide areas .......................................................................................................... 70 D.1 General ................................................................................................................................................. 70 D.2 Procedure ............................................................................................................................................ 70 D.3 Strength calculation ........................................................................................................................... 71 D.4 Possible action to prevent the allowable/limit values being exceeded ........................................ 71 D.5 Monitoring ........................................................................................................................................... 72 kSIST FprEN 1594:2013

FprEN 1594:2013 (E) 5 D.6 Bibliography ......................................................................................................................................... 72 Annex E (informative)

Areas with high seismic risk ..................................................................................... 74 E.1 General ................................................................................................................................................. 74 E.2 Procedure ............................................................................................................................................. 74 E.3 Strength calculation ............................................................................................................................ 75 E.3.1 Vibratory ground motion (shaking) ................................................................................................... 75 E.3.2 Permanent ground movement ........................................................................................................... 76 E.3.3 Possible action to prevent the allowable/limit values being exceeded ......................................... 76 E.4 Bibliography ......................................................................................................................................... 76 Annex F (informative)

Soil mechanics parameters ....................................................................................... 78 F.1 Parameters ................................................................................................................

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