Gas infrastructure - Gas pressure regulating stations for transmission and distribution - Functional requirements

This European Standard contains the relevant functional requirements for gas pressure regulating stations, which form part of gas transmission or distribution systems. It is applicable to the design, materials, construction, testing, operation and maintenance of gas pressure regulating stations.
This European Standard does not apply to gas pressure regulating stations commissioned prior to the publication of this standard.
The stations covered by this European Standard have a maximum upstream operating pressure which does not exceed 100 bar. For higher maximum upstream operating pressures this standard should be used as a guideline.
If the inlet pipework of the station is a service line and the maximum upstream operating pressure does not exceed 16 bar and the design flow rate is equal to or less than 200 m3/h under normal conditions, EN 12279 applies.
Basic system requirements for gas pressure regulating stations are contained in this European Standard. Requirements for individual components (valves, regulators, safety devices, pipes, etc.) or installation of the components are contained in the appropriate European Standards.
NOTE   For combined regulating and measuring stations, the additional requirements of EN 1776 can apply.
The requirements in this European Standard do not apply to the design and construction of auxiliary facilities such as sampling, calorimetering, odorization systems and density measuring. These facilities are covered by the appropriate European Standards, where existing, or other relevant standards.
The requirements of this European Standard are based on good gas engineering practice under conditions normally encountered in the gas industry. Requirements for unusual conditions cannot be specifically provided for, nor are all engineering and construction details prescribed.
The requirements in this European Standard are based on the physical and chemical data of gaseous fuels – including non-conventional gases – in accordance with Table 1 of EN 437:2003+A1:2009 for first and second family gases. Additional requirements in the case of gaseous fuels heavier than air and/or sour gases are not covered by this European Standard.
The objective of this European Standard is to ensure the safe operation of such stations. This does not, however, relieve all concerned of the responsibility for taking the necessary care and applying effective quality management during the design, construction and operation.

Gasinfrastruktur - Gas-Druckregelanlagen für Transport und Verteilung - Funktionale Anforderungen

Diese Europäische Norm beinhaltet die wesentlichen funktionalen Anforderungen für Gas-Druckregelanlagen in Gastransport- oder -verteilungssystemen. Sie gilt für Planung, Werkstoffe, Bau, Prüfung, Betrieb und Instandhaltung von Gas-Druckregelanlagen.
Diese Europäische Norm gilt nicht für Gas-Druckregelanlagen, die vor der Publikation dieser Norm in Betrieb genommen worden sind.
Diese Europäische Norm gilt für Anlagen mit maximal zulässigen eingangsseitigen Betriebsdrücken bis 100 bar. Für höhere, maximal zulässige, eingangsseitige Betriebsdrücke sollte diese Norm als eine Leitlinie herangezogen werden.
Wenn die Eingangsleitung der Anlage eine Anschlussleitung ist und der maximal zulässige eingangsseitige Betriebsdruck nicht höher als 16 bar und der Auslegungsdurchfluss nicht größer als 200 m3/h im Normzustand ist, gilt EN 12279.
Diese Europäische Norm behandelt grundsätzliche Systemanforderungen an Gas-Druckregelanlagen. Die Anforderungen an einzelne Komponenten (Armaturen, Regelgeräte, Sicherheitseinrichtungen, Rohre usw.) oder für den Einbau der Komponenten werden in den einschlägigen Europäischen Normen behandelt.
ANMERKUNG   Im Falle von kombinierten Mess- und Regelanlagen können die zusätzlichen Anforderungen nach EN 1776 zur Anwendung kommen.
Diese Europäische Norm gilt nicht für Planung und Errichtung von Hilfseinrichtungen, wie beispielsweise Probenahme, Brennwertmessung, Odorierung und Dichtemessung. Solche Einrichtungen werden in den einschlägigen Europäischen Normen, soweit vorhanden, oder anderen geeigneten Normen behandelt.
Die Anforderungen dieser Europäischen Norm basieren auf allgemein anerkannten Regeln der Gastechnik, wie sie unter gewöhnlichen Bedingungen in der Gasindustrie zur Anwendung kommen. Anforderungen hinsichtlich ungewöhnlicher Bedingungen sowie bautechnischer Details können nicht besonders berücksichtigt werden.
Diese Europäische Norm basiert auf den physikalischen und chemischen Daten von gasförmigen Brennstoffen – einschließlich der nicht-konventionellen Gase – der ersten und zweiten Gasfamilie entsprechend von EN 437:2009, Tabelle 1. Zusätzliche Anforderungen im Falle von gasförmigen Brennstoffen schwerer als Luft oder Sauergasen werden in dieser Europäischen Norm nicht behandelt.
Ziel dieser Europäischen Norm ist, den sicheren Betrieb der Gas-Druckregelanlagen sicherzustellen. Dies befreit jedoch die Verantwortlichen nicht davon, bei Planung, Bau und Betrieb mit der erforderlichen Sorgfalt vorzugehen und ein wirkungsvolles Qualitätsmanagement anzuwenden.

Infrastructures gazières - Postes de détente régulation de pression de gaz pour le transport et la distribution - Prescriptions fonctionnelles

La présente norme contient les prescriptions fonctionnelles relatives aux postes de détente régulation de pression de gaz faisant partie de réseaux de transport ou de distribution de gaz. Elle s'applique à la conception, aux matériaux, à la construction, aux essais, à l'exploitation et à la maintenance des postes de détente-régulation de pression de gaz (dénommés ci-après "postes de détente-régulation").
La présente Norme européenne ne s’applique pas aux postes de détente-régulation mis en service avant la publication de cette norme.
Les postes couverts par la présente Norme européenne ont une pression maximale de service en amont inférieure ou égale à 100 bar. Pour des pressions maximales de service en amont plus élevées, il convient d'utiliser la présente norme comme guide.
Si la tuyauterie d'entrée du poste est un branchement, et si la pression maximale de service en amont est inférieure à 16 bar et le débit de conception inférieur ou égal à 200 m3/h dans des conditions normales, l'EN 12279 s'applique.
Des prescriptions de base concernant les postes de détente-régulation de pression de gaz font partie de cette Norme européenne. Les prescriptions relatives aux composants individuels (robinets, détendeurs-régulateurs, dispositifs de sécurité, tubes, etc.) ou à l'installation des composants sont traitées dans les Normes européennes correspondantes.
NOTE   Dans le cas de postes de régulation et de comptage combinés, les prescriptions supplémentaires issues de l’EN 1776 peuvent être appliquées.
Les prescriptions de la présente Norme européenne ne s'appliquent pas à la conception et à la construction d'installations auxiliaires telles que systèmes d'échantillonnage, de calorimétrie, d'odorisation et de mesure de la densité. Ces types d’installations sont traités dans les Normes européennes appropriées, si elles existent, ou dans d’autres normes pertinentes.
Les prescriptions de la présente Norme européenne sont fondées sur une bonne pratique de l'ingénierie gazière, dans les conditions normalement rencontrées dans l'industrie du gaz. Les prescriptions pour les conditions inhabituelles ne peuvent pas être spécifiquement traitées, ni tous les détails relatifs à l'ingénierie et à la construction prescrits.
Les prescriptions de la présente Norme européenne s'appuient sur les données physiques et chimiques relatives aux gaz combustibles, y compris les gaz dits non conventionnels, conformément au Tableau 1 de l'EN 437:2003+A1:2009 pour les gaz des première et deuxième familles. Des prescriptions complémentaires pour les gaz combustibles plus lourds que l’air et/ou les gaz corrosifs, ne sont pas traitées dans la présente Norme européenne.
La présente Norme européenne a pour objet de garantir le fonctionnement en toute sécurité de ces postes. Toutefois, cela ne dégage pas de leur responsabilité l'ensemble des personnes concernées, qui doivent accorder toute l'attention nécessaire et mettre en application une gestion de la qualité efficace lors des phases de conception, de construction et d'exploitation.

Infrastruktura za plin - Plinske postaje za regulacijo tlaka za prenos in distribucijo - Funkcionalne zahteve

Ta evropski standard vsebuje relevantne funkcionalne zahteve za plinske postaje za regulacijo tlaka, ki so del plinskih sistemov za prenos ali distribucijo. Uporablja se pri obliki, materialih, konstrukciji, testiranju, obratovanju in vzdrževanju plinskih postaj za regulacijo tlaka.
Ta evropski standard se ne uporablja za plinske postaje za regulacijo tlaka, ki so obratovale pred objavo tega standarda.
Postaje, vključene v ta evropski standard, delujejo z največjim vhodnim delovnim tlakom, ki ne presega 100 barov. Pri višjih največjih vhodnih delovnih tlakih naj bi ta standard služil kot smernica.
Če je sesalni cevovod postaje priključni vod, največji vhodni delovni tlak ne preseže 16 barov, načrtovani pretok pa je enak ali manjši od 200 m³/h v normalnih razmerah, potem velja standard EN 12279.
V tem evropskem standardu so vključene osnovne sistemske zahteve za plinske postaje za regulacijo tlaka. Zahteve za posamezne sestavne dele (ventili, regulatorji, varnostne naprave, cevi itd.) ali inštalacija sestavnih delov so vsebovani v ustreznih evropskih standardih.
Pri kombiniranih postajah za regulacijo in merjenje je mogoče, da veljajo dodatne zahteve standarda EN 1776.
Zahteve v tem evropskem standardu se ne uporabljajo za projektiranje in gradnjo pomožnih obratov, kot so sistemi za vzorčenje, kalorimetrijo, odišavljenje in merjenje gostote. Ti obrati so zajeti v ustreznih evropskih standardih, če obstajajo, ali v drugih relevantnih standardih.
Zahteve tega evropskega standarda temeljijo na dobri tehnološki praksi oskrbe s plinom v razmerah, ki so običajne v plinski industriji. Zahtev za neobičajne razmere ni mogoče izrecno določiti, niti niso predpisane vse inženirske in gradbene podrobnosti.
Zahteve v tem evropskem standardu temeljijo na fizikalnih in kemijskih podatkih plinastih goriv, vključno z nekonvencionalnimi plini, v skladu s preglednico 1 standarda EN 437 2009 za pline prve in druge družine. Dodatne zahteve v primeru plinastih goriv, težjih od zraka, in/ali kislih plinov niso vključene v tem evropskem standardu.
Cilj tega evropskega standarda je zagotoviti varno delovanje takih postaj. To pa ne odvezuje vseh vpletenih, da med načrtovanjem, gradnjo in obratovanjem ne bi poskrbeli za ustrezne ukrepe in učinkovit sistem upravljanja kakovosti.
Ta evropski standard določa splošna osnovna načela za infrastrukturo za plin. Uporabniki tega evropskega standarda naj bi se zavedali, da lahko v državah članicah CEN obstajajo podrobnejši nacionalni standardi in/ali kodeksi ravnanja.
Ta evropski standard je namenjen uporabi v povezavi s temi nacionalnimi standardi in/ali kodeksi ravnanja, ki določajo zgoraj navedena osnovna načela.
Kadar so strožje zahteve v nacionalni zakonodaji/predpisih v nasprotju z zahtevami iz tega standarda, ima prednost nacionalna zakonodaja/predpis, kot je navedeno v standardu CEN/TR 13737 (vsi deli). CEN/TR 13737 navaja:
– pojasnitev celotne zakonodaje/vseh predpisov, ki veljajo v državi članici,
– po potrebi strožje nacionalne zahteve,
– nacionalno kontaktno točko za najnovejše informacije.

General Information

Status
Published
Publication Date
21-Oct-2014
Current Stage
9060 - Closure of 2 Year Review Enquiry - Review Enquiry
Due Date
03-Jun-2020
Completion Date
03-Jun-2020

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Infrastruktura za plin - Plinske postaje za regulacijo tlaka za prenos in distribucijo - Funkcionalne zahteveGasinfrastruktur - Gas-Druckregelanlagen für Transport und Verteilung - Funktionale AnforderungenInfrastructures gazières - Postes de détente régulation de pression de gaz pour le transport et la distribution - Prescriptions fonctionnellesGas infrastructure - Gas pressure regulating stations for transmission and distribution - Functional requirements75.200Petroleum products and natural gas handling equipment23.060.40Pressure regulatorsICS:Ta slovenski standard je istoveten z:EN 12186:2014SIST EN 12186:2015en,fr,de01-januar-2015SIST EN 12186:2015SLOVENSKI

STANDARDSIST EN 12186:2000/A1:2005SIST EN 12186:20001DGRPHãþD
SIST EN 12186:2015
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12186

October 2014 ICS 23.060.40; 27.060.20; 75.200 Supersedes EN 12186:2000English Version

Gas infrastructure - Gas pressure regulating stations for transmission and distribution - Functional requirements

Infrastructures gazières - Postes de détente régulation de pression de gaz pour le transport et la distribution - Prescriptions fonctionnelles

Gasinfrastruktur - Gas-Druckregelanlagen für Transport und Verteilung - Funktionale Anforderungen This European Standard was approved by CEN on 13 September 2014.

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 © 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12186:2014 ESIST EN 12186:2015

EN 12186:2014 (E) 2 Contents Page

Foreword ..............................................................................................................................................................4 1 Scope ......................................................................................................................................................6 2 Normative references ............................................................................................................................6 3 Terms, definitions, symbols and abbreviations .................................................................................7 3.1 General ....................................................................................................................................................7 3.2 Station .....................................................................................................................................................8 3.3 Pressure, design and testing ............................................................................................................. 10 3.4 Pressure control ................................................................................................................................. 11 3.5 Continuity of supply ........................................................................................................................... 12 4 Quality and management system ...................................................................................................... 13 5 Environmental impact ........................................................................................................................ 13 6 Layout of the gas pressure regulating station ................................................................................ 13 6.1 General ................................................................................................................................................. 13 6.2 Layout of the site ................................................................................................................................ 14 6.3 Site security ......................................................................................................................................... 14 7 Housings .............................................................................................................................................. 14 7.1 General ................................................................................................................................................. 14 7.2 Requirements for housings ............................................................................................................... 15 7.3 Underground stations ........................................................................................................................ 16 8 Design of the station .......................................................................................................................... 17 8.1 General ................................................................................................................................................. 17 8.2 Continuity of supply ........................................................................................................................... 17 8.3 Gas pre-heating ................................................................................................................................... 17 8.4 Filters, separators, scrubbers ........................................................................................................... 18 8.5 Noise control ....................................................................................................................................... 18 8.6 Apertures and vent lines .................................................................................................................... 18 8.7 Hazardous areas ................................................................................................................................. 19 8.8 Lightning and earthing ....................................................................................................................... 19 8.9 Cathodic protection and electrical isolation .................................................................................... 20 8.10 Pressure control equipment and ancillaries .................................................................................... 20 8.11 Pipework .............................................................................................................................................. 20 8.12 Welding ................................................................................................................................................ 21 8.13 Instrumentation pipework .................................................................................................................. 21 8.14 Stress analysis .................................................................................................................................... 22 8.15 Standard pressure equipment ........................................................................................................... 23 8.16 Isolating valves ................................................................................................................................... 23 9 Pressure control ................................................................................................................................. 23 9.1 General ................................................................................................................................................. 23 9.2 Pressure regulating system ............................................................................................................... 24 9.3 Pressure safety system ...................................................................................................................... 24 9.4 Safety shut-off devices ...................................................................................................................... 26 9.5 Monitors ............................................................................................................................................... 26 9.6 Venting pressure safety devices ....................................................................................................... 27 9.7 Pressure alarm system ...................................................................................................................... 27 9.8 Instrumentation ................................................................................................................................... 27 9.9 Bypasses ............................................................................................................................................. 27 SIST EN 12186:2015

EN 12186:2014 (E) 3 10 Testing .................................................................................................................................................. 27 10.1 General ................................................................................................................................................. 27 10.2 Pressure testing .................................................................................................................................. 28 10.3 Reporting .............................................................................................................................................. 28 11 Commissioning .................................................................................................................................... 29 12 Operation and maintenance ............................................................................................................... 29 12.1 General ................................................................................................................................................. 29 12.2 Data ....................................................................................................................................................... 30 12.3 Maintenance ......................................................................................................................................... 30 12.4 Training................................................................................................................................................. 31 12.5 Work undertaken ................................................................................................................................. 31 12.6 Fire fighting .......................................................................................................................................... 31 13 Decommissioning and disposal ........................................................................................................ 31 13.1 Decommissioning ................................................................................................................................ 31 13.2 Disposal ................................................................................................................................................ 32 Annex A (informative)

Glossary....................................................................................................................... 33 Annex B (informative)

Significant technical changes between this European Standard and the previous edition ................................................................................................................................... 35 Bibliography ...................................................................................................................................................... 37

SIST EN 12186:2015

EN 12186:2014 (E) 4 Foreword This document (EN 12186:2014) 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 April 2015 and conflicting national standards shall be withdrawn at the latest by April 2015. 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 12186:2000. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. Annex B 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 into the on-shore transmission network up to the inlet connection of gas appliances, including transmission, distribution, storage, compression, pressure regulation and metering, installation, injection of non-conventional gases, gas quality issues and others. In preparing this European Standard, a basic understanding of gas infrastructure by the user has been assumed. The gas infrastructure is complex and the importance on safety of its construction and use has led to the development of very detailed codes of practice and operating manuals in the member countries. These detailed statements embrace recognized standards of gas engineering and the specific requirements imposed by the legal structures of the member countries. As gas pressure regulating stations for transmission and distribution are specifically designed for pipelines, they are considered as annexed equipment, and as such are excluded from the scope of the Directive 97/23/EC (Pressure Equipment Directive – PED [11]). However, standard pressure equipment installed in these stations, e.g. gas pressure regulators, safety valves, valves, filters, heat exchangers, vessels, is covered by the directive [15]. Directive 2009/73/EC [13] concerning common rules for the internal market in natural gas and the related Regulation (EC) No 715/2009 [14] 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. In this edition of EN 12186 environmental aspects relevant to the design, construction and testing, operation and maintenance, decommissioning and disposal of gas pressure regulating stations are covered in accordance with CEN Guide 4 and CEN/TR 16388. This European Standard specifies common basic principles for the gas infrastructure. Users of this European Standard should be aware that more detailed national standards and/or codes of practice can exist 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 basic principles as outlined in Clause 1 of this European Standard. SIST EN 12186:2015

EN 12186:2014 (E) 5 In the event of conflicts in terms of more restrictive requirements in national legislation/regulation with the requirements of this standard, the national legislation/regulation takes precedence as illustrated in CEN/TR 13737-1 and CEN/TR 13737-2. CEN/TR 13737 gives: — clarification of all legislations/regulations applicable in a member state; — if appropriate, more restrictive national requirements; — a national contact point for the latest information. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, 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 12186:2015

EN 12186:2014 (E) 6 1 Scope This European Standard contains the relevant functional requirements for gas pressure regulating stations, which form part of gas transmission or distribution systems. It is applicable to the design, materials, construction, testing, operation and maintenance of gas pressure regulating stations. This European Standard does not apply to gas pressure regulating stations commissioned prior to the publication of this standard. The stations covered by this European Standard have a maximum upstream operating pressure which does not exceed 100 bar. For higher maximum upstream operating pressures this standard should be used as a guideline. If the inlet pipework of the station is a service line and the maximum upstream operating pressure does not exceed 16 bar and the design flow rate is equal to or less than 200 m3/h under normal conditions, EN 12279 applies. Basic system requirements for gas pressure regulating stations are contained in this European Standard. Requirements for individual components (valves, regulators, safety devices, pipes, etc.) or installation of the components are contained in the appropriate European Standards. NOTE For combined regulating and measuring stations, the additional requirements of EN 1776 can apply. The requirements in this European Standard do not apply to the design and construction of auxiliary facilities such as sampling, calorimetering, odorization systems and density measuring. These facilities are covered by the appropriate European Standards, where existing, or other relevant standards. The requirements of this European Standard are based on good gas engineering practice under conditions normally encountered in the gas industry. Requirements for unusual conditions cannot be specifically provided for, nor are all engineering and construction details prescribed. The requirements in this European Standard are based on the physical and chemical data of gaseous fuels – including non-conventional gases – in accordance with Table 1 of EN 437:2003+A1:2009 for first and second family gases. Additional requirements in the case of gaseous fuels heavier than air and/or sour gases are not covered by this European Standard. The objective of this European Standard is to ensure the safe operation of such stations. This does not, however, relieve all concerned of the responsibility for taking the necessary care and applying effective quality management during the design, construction and operation. 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 334, Gas pressure regulators for inlet pressures up to 100 bar EN 437:2003+A1:2009, Test gases - Test pressures - Appliance categories EN 1127-1, Explosive atmospheres - Explosion prevention and protection - Part 1: Basic concepts and methodology EN 1594, Gas infrastructure - Pipelines for maximum operating pressure over 16 bar - Functional requirements SIST EN 12186:2015

EN 12186:2014 (E) 7 EN 1775, Gas supply - Gas pipework for buildings - Maximum operating pressure less than or equal to 5 bar - Functional recommendations EN 10204, Metallic products - Types of inspection documents EN 12007-1, Gas infrastructure - Pipelines for maximum operating pressure up to and including 16 bar - Part 1: General functional requirements EN 12327, Gas infrastructure - Pressure testing, commissioning and decommissioning procedures - Functional requirements EN 12732, Gas infrastructure - Welding steel pipework - Functional requirements EN 13463-1, Non-electrical equipment for use in potentially explosive atmospheres - Part 1: Basic method and requirements EN 14382, Safety devices for gas pressure regulating stations and installations - Gas safety shut-off devices for inlet pressures up to 100 bar EN 15001-1, Gas Infrastructure - Gas installation pipework with an operating pressure greater than 0,5 bar for industrial installations and greater than 5 bar for industrial and non-industrial installations - Part 1: Detailed functional requirements for design, materials, construction, inspection and testing EN 16348, Gas infrastructure - Safety Management System (SMS) for gas transmission infrastructure and Pipeline Integrity Management System (PIMS) for gas transmission pipelines - Functional requirements EN 60079-10-1, Explosive atmospheres - Part 10-1: Classification of areas - Explosive gas atmospheres EN 60079-14, Explosive atmospheres - Part 14: Electrical installations design, selection and erection EN 62305-1, Protection against lightning - Part 1: General principles

EN 62305-2, Protection against lightning - Part 2: Risk management

EN 62305-3, Protection against lightning - Part 3: Physical damage to structures and life hazard EN 62305-4, Protection against lightning - Part 4: Electrical and electronic systems within structures CEN/TS 15399, Gas Supply Systems - Guidelines for Management systems for Gas Distribution Network 3 Terms, definitions, symbols and abbreviations For the purposes of this document, the following terms, definitions, symbols and abbreviations apply. 3.1 General 3.1.1 authorized person competent person who is appointed to fulfil a given task on gas pressure regulating stations Note 1 to entry: The appointment procedure is defined in each member country. 3.1.2 competent person person who is trained, experienced and approved to perform activities relating to gas pressure regulating stations SIST EN 12186:2015

EN 12186:2014 (E) 8 Note 1 to entry: Means of approval, if any, will be determined within each member country. 3.1.3 gas gaseous fuel, which is in a gaseous state at a temperature of 15 °C and under atmospheric pressure (1,013 25 bar absolute) 3.1.4 volume under normal conditions quantity of gas which in a dry state occupies a volume of 1 m3 at a pressure of 1,013 25 bar absolute and at a temperature of 0 °C 3.1.5 hazardous area area in which an explosive or flammable gas atmosphere is or may be expected to be present, in quantities such as to require special precautions for the construction, installation and use of equipment [SOURCE: EN 60079-10-1:2009] 3.1.6 hazardous area zones hazardous areas are classified into zones based upon the frequency of the occurrence and the duration of an explosive gas atmosphere [SOURCE: EN 60079-10-1:2009] 3.2 Station 3.2.1 cavity wall wall formed from two layers such as brick or blockwork with a space between 3.2.2 enclosed installation plant installed in an enclosed space (apart from any necessary ventilation apertures) 3.2.3 open-air installation plant installed in the open air, which may or may not be protected by a canopy 3.2.4 separate building building which is detached from any other building and is used exclusively for the enclosed installation of gas pressure regulating and/or measuring equipment and ancillaries and can be accessed by personnel 3.2.5 cabinet station enclosed space (apart from any necessary ventilation apertures), which is used exclusively to house gas pressure regulating and/or measuring equipment and ancillaries and is too small for access by personnel 3.2.6 underground station space, partly or totally below ground level in which the gas pressure regulating and/or measuring equipment and ancillaries are installed SIST EN 12186:2015

EN 12186:2014 (E) 9 3.2.7 component any item from which a gas pressure regulating station is constructed Note 1 to entry: A distinction is drawn between the following groups of components: – equipment – e.g. valves, meters, preheaters, line filters, safety shut-off devices and pressure regulators which are used to control the flow of gas in and out of the station; – pipework – e.g. pipe, reducers, bends, tees and insulating joints which are used to connect the equipment; – ancillaries – additional devices and instrumentation which ensure that the equipment functions correctly. 3.2.8 inlet pipework connecting pipework through which gas enters the station 3.2.9 main pipework in the gas infrastructure to which service lines are connected 3.2.10 outlet pipework connecting pipework through which gas leaves the station 3.2.11 pressure regulating station installation comprising all the equipment including the inlet and outlet pipework as far as the isolating valves and any structure within which the equipment is housed, used for gas pressure regulation and over-pressure protection 3.2.12 service line pipework from the main to the point of delivery of the gas into the installation pipework 3.2.13 standard pressure equipment equipment covered by Directive 97/23/EC (Pressure Equipment Directive - PED) EXAMPLE Gas pressure regulators, safety valves, valves, filters, heat exchangers, vessels. Note 1 to entry: See Article 1 No. 3.1 of Directive 97/23/EC and Guideline 1/17 of the Commission’s Working Group "Pressure" [15]. 3.2.14 commissioning activities required to fill pipework, equipment and assemblies with gas for the first time and to perform test runs to check the system‘s integrity 3.2.15 decommissioning activities required to take out of service any pipework, station, equipment or assemblies filled with gas and to disconnect them from the system 3.2.16 inspection process of measuring, examining, testing, gauging or otherwise determining the status of items of the pipeline system or installation and comparing it with the applicable requirements SIST EN 12186:2015

EN 12186:2014 (E) 10 3.2.17 maintenance combination of all technical and associated administrative actions intended to keep an item in, or restore it to, a state in which it can perform its required function Note 1 to entry: Maintenance includes surveillance, inspection, function check-out, overhaul and repair. Note 2 to entry: For further terms and definitions related to maintenance, see EN 13306. 3.2.18 disposal activities to be performed after components of a decommissioned gas pressure regulating station have been dismantled 3.3 Pressure, design and testing 3.3.1 design factor fo factor applied when calculating the wall thickness or design pressure 3.3.2 design flow rate flow rate on which the design calculations are based 3.3.3 design pressure DP pressure on which design calculations are based Note 1 to entry: A part of a pressure regulating station designed for a design pressure DP can comprise components designed for a different maximum allowable pressure (PS). 3.3.4 pressure gauge pressure of the fluid inside the system, measured in static conditions 3.3.5 operating pressure OP pressure which occurs within a system under normal operating conditions 3.3.6 maximum operating pressure MOP maximum pressure at which a system can be operated continuously under normal operating conditions Note 1 to entry: Normal operating conditions are: no fault in any device or stream. 3.3.7 temporary operating pressure TOP pressure at which a system can be operated temporarily under control of regulating devices 3.3.8 maximum incidental pressure MIP maximum pressure which a system can experience during a short time, limited by the safety devices SIST EN 12186:2015

EN 12186:2014 (E) 11 3.3.9 maximum allowable pressure PS maximum pressure for which the equipment is designed, as specified by the manufacturer Note 1 to entry: Definition and requirements according Directive 97/23/EC [11]. 3.3.10 strength test specific procedure to verify that the pipework and/or station meets the requirements for mechanical strength 3.3.11 tightness test specific procedure to verify that the pipework and/or station meets the requirements for tightness 3.3.12 combined test specific procedure to verify that the pipework and/or station meets the requirements for mechanical strength and tightness 3.3.13 test pressure TP pressure at which pressure tests are conducted 3.3.14 strength test pressure STP pressure applied to a system during strength testing 3.3.15 combined test pressure CTP pressure applied to a system during combined testing, i.e. tightness and strength testing 3.4 Pressure control 3.4.1 alarm signal of a situation in which manual intervention may be needed or in which the system itself may perform a safety action 3.4.2 direct-acting requiring no auxiliary power for operation 3.4.3 indirect-acting requiring auxiliary power for operation 3.4.4 instrumentation any system or combination of equipment for measurement and control SIST EN 12186:2015

EN 12186:2014 (E) 12 3.4.5 instrumentation pipework pipework required for the proper functio

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