Gas infrastructure - Compressor stations - Functional requirements

EN 12583 describes the specific functional requirements for the design, construction, operation, maintenance and disposal activities for safe and secure gas compressor stations. This European Standard applies to new gas compressor stations with a Maximum Operating Pressure (MOP) over 16 bar and with a total shaft power over 1 MW. For existing compressor stations, this European Standard applies to new compressor units. Where changes/modifications to existing installations take place, due account may be taken of the requirements of this European Standard. This European Standard does not apply to gas compressor stations operating prior to the publication of this European Standard. The purpose of this European Standard is intended to: - ensure the health and safety of the public and all site personnel, - to cover environmental issues and - to avoid incidental damage to nearby property. 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 may 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 above-mentioned basic principles.

Gasinfrastruktur - Verdichterstationen - Funktionale Anforderungen

Diese Europäische Norm legt die spezifischen funktionalen Anforderungen für sichere und zuverlässige Gasverdichterstationen fest, die bei Planung, Errichtung, Betrieb, Instandhaltung und Entsorgung zu beachten sind.
Diese Europäische Norm gilt für neue Gasverdichterstationen mit einem maximal zulässigen Betriebsdruck (MOP) über 16 bar und einer Gesamtkupplungsleistung über 1 MW. Für bestehende Verdichterstationen gilt diese Europäische Norm für neue Verdichtereinheiten. Falls Änderungen/Modifikationen an bestehenden Anlagen erfolgen, sollten die Anforderungen dieser Norm angemessen berücksichtigt werden.
Diese Europäische Norm braucht nicht auf Gasverdichterstationen angewendet zu werden, die vor der Veröffentlichung dieser Europäischen Norm in Betrieb genommen wurden.
Der Zweck dieser Norm ist es
- die Gesundheit und Sicherheit der Öffentlichkeit und der Mitarbeiter sicherzustellen
- die Aspekte des Umweltschutzes zu behandeln und
- die Beschädigung fremden Eigentums zu verhindern.
Diese Europäische Norm enthält allgemeine Grundsätze der Gasinfrastruktur. Anwender dieser Europäischen Norm sollten sich bewusst sein, dass detailliertere nationale Normen bzw. Technische Regeln in den CEN-Mitgliedsländern existieren können.
Diese Europäische Norm sollte in Verbindung mit diesen, die oben erwähnten allgemeinen Grundsätze darlegenden nationalen Normen bzw. 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 im FprCEN/TR 13737 beschrieben. Der FprCEN/TR 13737 enthält
- eine Klarstellung aller in dem Mitgliedsstaaten anwendbaren Gesetze und Bestimmungen;
- soweit zutreffend, restriktivere nationale Anforderungen;
- eine nationale Kontaktstelle für aktuelle Informationen.
Diese Norm gilt nicht für:
- Off-shore-Gasverdichterstationen;
- Gasverdichter in Erdgastankstellen;
- Kundenanlagen hinter der Liefergrenze;
- Auslegung und Bau von Antriebseinheiten (siehe Anhang C).
Für die Anbindung von Versorgungeinrichtungen, z. B. von kleinen Heizkesseln, sollte EN 1775 angewandt werden.
Bild 1 zeigt eine schematische Darstellung von Verdichterstationen in einem Gasversorgungssystem.

Infrastructures gazières - Stations de compression - Prescriptions fonctionnelles

La présente Norme européenne établit les prescriptions fonctionnelles spécifiques pour la conception, la construction, l'exploitation, l’entretien et l’abandon en sécurité des stations de compression du gaz.
La présente Norme européenne s’applique aux nouvelles stations de compression dont la pression maximale de service (MOP) est supérieure à 16 bar et dont la puissance totale à l’arbre est supérieure à 1 MW. Dans le cas des stations de compression existantes, la présente norme s’applique aux nouvelles unités de compression. Lorsque des changements/modifications d'installations existantes se déroulent, les exigences de cette norme peuvent être prises en compte.
Cette Norme européenne ne s'applique pas aux stations de compression de gaz en fonctionnement avant la publication de la présente Norme européenne.
Le but de cette Norme européenne est destiné à
-   assurer la santé et la sécurité du public et de tout le personnel du site
-   couvrir les questions environnementales et
-   éviter d'endommager incidemment les biens à proximité.
La présente Norme européenne spécifie les principes de base communs pour les infrastructures gazières. 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 de normes nationales plus détaillés. La présente Norme européenne est destinée à s'appliquer conjointement avec ces normes nationales et/ou codes de pratique, qui détaillent les principes de base précités.
En cas de conflits en termes d'exigences plus restrictives de la législation nationale/réglementation avec les exigences de cette norme, la législation nationale/règlementation prévaut, comme illustré dans le FprCEN/TR 13737. Le FprCEN/TR 13737.donne :
-   des clarifications sur les lois et règlements applicables dans les états membres ;
-   si applicable, des impositions nationales plus contraignantes ;
-   un point de contact national pour les informations le plus récentes.
La présente norme n'est pas applicable :
-   aux stations de compression de gaz de plates-formes off-shore ;
-   aux stations de compression de gaz pour stations de remplissage de gaz naturel comprimé pour les véhicules.
-   aux installations des clients en aval du point de transfert de responsabilité ;
-   à la conception et la construction des packages de l’entrainement (voir Annexe C).
(...)

Infrastruktura za plin - Kompresorske postaje - Funkcionalne zahteve

Standard EN 12583 opisuje posebne funkcionalne zahteve za dejavnosti projektiranja, konstruiranja, delovanja, vzdrževanja in odstranjevanja za varne plinske kompresorske postaje. Ta evropski standard se uporablja za nove plinske kompresorske postaje z največjim obratovalnim tlakom (MOP), večjim od 16 barov, in skupno pogonsko močjo osi kompresorja, večjo od 1 MW. Ta evropski standard se pri obstoječih kompresorskih postajah uporablja za nove kompresorske enote. Kadar pride do sprememb obstoječe napeljave, se lahko upoštevajo zahteve iz tega evropskega standarda. Ta evropski standard se ne uporablja za plinske kompresorske postaje, ki so obratovale pred objavo tega evropskega standarda. Namen tega evropskega standarda je: – zagotoviti varnost in zdravje posameznikov ter osebja na kraju dela, – zajeti okoljevarstvene težave in – se izogniti nenamerni škodi na bližnjem premoženju. Ta evropski standard določa splošna osnovna načela za infrastrukturo za plin. Uporabniki tega evropskega standarda se morajo zavedati, da lahko v državah članicah CEN obstajajo podrobnejši nacionalni standardi in/ali kodeks ravnanja. Ta evropski standard je namenjen uporabi v povezavi s temi nacionalnimi standardi in/ali kodeksi ravnanja, ki določajo zgoraj navedena osnovna načela.

General Information

Status
Withdrawn
Public Enquiry End Date
31-Jul-2012
Publication Date
02-Jun-2014
Withdrawal Date
15-Aug-2022
Technical Committee
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
03-Aug-2022
Due Date
26-Aug-2022
Completion Date
16-Aug-2022

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Infrastruktura za plin - Kompresorske postaje - Funkcionalne zahteveGasinfrastruktur - Verdichterstationen - Funktionale AnforderungenInfrastructures gazières - Stations de compression - Prescriptions fonctionnellesGas infrastructure - Compressor stations - Functional requirements75.200Petroleum products and natural gas handling equipment23.140VWURMLCompressors and pneumatic machinesICS:Ta slovenski standard je istoveten z:EN 12583:2014SIST EN 12583:2014en,fr,de01-julij-2014SIST EN 12583:2014SLOVENSKI

STANDARDSIST EN 12583:20031DGRPHãþD
SIST EN 12583:2014
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12583
March 2014 ICS 23.140; 75.200 Supersedes EN 12583:2000English Version
Gas Infrastructure - Compressor stations - Functional requirements

Infrastructures gazières - Stations de compression - Prescriptions fonctionnelles

Gasinfrastruktur - Verdichterstationen - Funktionale Anforderungen This European Standard was approved by CEN on 20 December 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 © 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12583:2014 ESIST EN 12583:2014

EN 12583:2014 (E) 2 Contents Page Foreword ..............................................................................................................................................................4 1 Scope ......................................................................................................................................................5 2 Normative references ............................................................................................................................6 3 Terms and definitions ...........................................................................................................................7 4 Safety ................................................................................................................................................... 13 5 Asset management and quality assurance ...................................................................................... 14 6 Environmental constraints ................................................................................................................ 14 7 Design, construction and testing ...................................................................................................... 14 7.1 General requirements for design ...................................................................................................... 14 7.1.1 General ................................................................................................................................................. 14 7.1.2 Safety and the environment ............................................................................................................... 15 7.2 Location and station lay-out .............................................................................................................. 15 7.2.1 Location ............................................................................................................................................... 15 7.2.2 Station lay-out ..................................................................................................................................... 16 7.3 Pipework .............................................................................................................................................. 17 7.3.1 Design considerations ....................................................................................................................... 17 7.3.2 Valves ................................................................................................................................................... 18 7.3.3 Gas cleaning ........................................................................................................................................ 18 7.3.4 Gas coolers ......................................................................................................................................... 18 7.3.5 Pressure reduction stations .............................................................................................................. 18 7.3.6 Recycle line ......................................................................................................................................... 18 7.3.7 Vent systems ....................................................................................................................................... 18 7.3.8 Station isolation system .................................................................................................................... 19 7.3.9 Corrosion protection .......................................................................................................................... 19 7.3.10 Services pipework .............................................................................................................................. 19 7.3.11 Standard colour code ......................................................................................................................... 19 7.4 Compressor unit ................................................................................................................................. 19 7.4.1 General ................................................................................................................................................. 19 7.4.2 Driver .................................................................................................................................................... 20 7.4.3 Compressor ......................................................................................................................................... 21 7.4.4 Unit Control System (UCS) ................................................................................................................ 22 7.4.5 Unit auxiliary equipment .................................................................................................................... 25 7.4.6 Foundations ........................................................................................................................................ 29 7.4.7 Compressor Unit Housing ................................................................................................................. 29 7.5 Station Control and Automation ....................................................................................................... 30 7.5.1 Station Control System (SCS) ........................................................................................................... 30 7.5.2 Station emergency shutdown systems ............................................................................................ 30 7.5.3 Gas detection system ......................................................................................................................... 31 7.5.4 Fire protection system ....................................................................................................................... 31 7.5.5 Station valve control and supervision .............................................................................................. 31 7.5.6 Over-pressure protection system ..................................................................................................... 31 7.5.7 Over-temperature protection system................................................................................................ 32 7.6 Electrical installation and power supply .......................................................................................... 32 7.6.1 General ................................................................................................................................................. 32 7.6.2 Electrical power supply ...................................................................................................................... 32 7.6.3 Electrical installation .......................................................................................................................... 32 7.7 General requirements for construction ............................................................................................ 32 SIST EN 12583:2014

EN 12583:2014 (E) 3 7.7.1 General ................................................................................................................................................. 32 7.7.2 Execution of work ................................................................................................................................ 33 7.7.3 Station pipework construction ........................................................................................................... 33 7.8 Testing and acceptance ...................................................................................................................... 33 7.8.1 General requirements ......................................................................................................................... 33 7.8.2 Pre-commissioning ............................................................................................................................. 33 7.8.3 Commissioning .................................................................................................................................... 33 7.8.4 As built records of the station ........................................................................................................... 34 7.8.5 Handover .............................................................................................................................................. 34 7.8.6 Responsibility for safety ..................................................................................................................... 34 8 Operation .............................................................................................................................................. 34 8.1 Introduction and basic requirements ................................................................................................ 34 8.2 Operating organization ....................................................................................................................... 35 8.3 Instruction procedures ....................................................................................................................... 35 8.3.1 General ................................................................................................................................................. 35 8.3.2 Instructions for normal situations ..................................................................................................... 35 8.3.3 Instructions for failure or emergency situations ............................................................................. 36 8.3.4 Procedures for specific planned situations ...................................................................................... 36 8.4 Management of operating procedures .............................................................................................. 36 8.5 Training of personnel .......................................................................................................................... 37 8.6 Safety precautions .............................................................................................................................. 37 8.6.1 Prevention of gas explosion and fire ................................................................................................ 37 8.6.2 Storage of combustible materials ...................................................................................................... 37 8.6.3 Venting.................................................................................................................................................. 37 9 Maintenance ......................................................................................................................................... 38 9.1 Introduction and basic requirements ................................................................................................ 38 9.2 Maintenance organization .................................................................................................................. 38 9.3 Maintenance procedures .................................................................................................................... 38 9.3.1 General ................................................................................................................................................. 38 9.3.2 Gas compressor units ......................................................................................................................... 39 9.3.3 Pipework ............................................................................................................................................... 39 9.4 Management of the maintenance procedures .................................................................................. 39 9.5 Training of personnel .......................................................................................................................... 39 9.6 Maintenance tools and equipment .................................................................................................... 39 9.7 Safety .................................................................................................................................................... 40 9.7.1 General ................................................................................................................................................. 40 9.7.2 Safety precautions .............................................................................................................................. 40 9.7.3 Safety devices ...................................................................................................................................... 40 10 Decommissioning and disposal ........................................................................................................ 41 10.1 Decommissioning ................................................................................................................................ 41 10.2 Disposal ................................................................................................................................................ 41 Annex A (informative)

Boundary of a gas compressor station .................................................................... 42 Annex B (informative)

Parts of a gas compressor unit ................................................................................. 44 Annex C (informative)

Boundary Gas compressor unit — Driver package ................................................ 45 Annex D (informative)

Boundary Gas compressor unit — Gas compressor .............................................. 46 Annex E (informative)

Boundary Gas compressor unit — Unit control system ......................................... 47 Annex F (informative)

Boundary Gas compressor unit — Auxiliary equipment ........................................ 48 Annex G (informative)

Significant technical changes between this European Standard and the previous edition ................................................................................................................................... 49 Bibliography ...................................................................................................................................................... 51

SIST EN 12583:2014

EN 12583:2014 (E) 4 Foreword This document (EN 12583:2014) 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 September 2014, and conflicting national standards shall be withdrawn at the latest by September 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 12583:2000. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. Annex G 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 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 recognised standards of gas engineering and the specific requirements imposed by the legal structures of the member countries. 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 standardisation. 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 12583 environmental aspects relevant to the design, construction and testing, operation and maintenance, decommissioning and disposal of compressor stations in the scope of this standard are covered in accordance with CEN Guide 4 and CEN/TR 16388. This European Standard supersedes all other European Standards for gas compressor stations in the gas infrastructure above 16 bar and with a total shaft power over 1 MW. 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 12583:2014

EN 12583:2014 (E) 5 1 Scope This European Standard describes the specific functional requirements for the design, construction, operation, maintenance and disposal activities for safe and secure gas compressor stations. This European Standard applies to new gas compressor stations with a Maximum Operating Pressure (MOP) over 16 bar and with a total shaft power over 1 MW. For existing compressor stations, this European Standard applies to new compressor units. Where changes/modifications to existing installations take place, due account may be taken of the requirements of this European Standard. This European Standard does not apply to gas compressor stations operating prior to the publication of this European Standard. The purpose of this European Standard is intended to: — ensure the health and safety of the public and all site personnel, — to cover environmental issues and — to avoid incidental damage to nearby property. 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 may 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 above-mentioned basic principles. In the event of conflicts in terms of more restrictive requirements in national legislation/regulation with the requirements of this European Standard, the national legislation/regulation takes precedence as illustrated in CEN/TR 13737 (all parts). CEN/TR 13737 (all parts) 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. This European Standard does not apply to: — off-shore gas compressor stations; — gas compressor stations for compressed natural gas filling-stations; — customer installations downstream of the point of custody transfer; — design and construction of driver packages (see Annex C). For supplies to utility services such as small central heating boilers reference should be made to EN 1775. Figure 1 shows a schematic representation of compressor stations in a gas infrastructure. SIST EN 12583:2014

EN 12583:2014 (E) 6

Key 1 compressor station 4 pig traps 2 distribution system 5 transmission line 3 metering and/or pressure limiting or regulation station 6 storage facility NOTE Parts indicated in frames by thick lines are within the scope of this European Standard (* part of pipeline but operated by SCS). Figure 1 — Schematic representation of compressor stations in the gas infrastructure 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 1012-3, Compressors and vacuum pumps — Safety requirements — Part 3: Process compressors EN 1594, Gas infrastructure — Pipelines for maximum operating pressure over 16 bar — Functional requirements EN 12186, Gas supply systems — Gas pressure regulating stations for transmission and distribution — Functional requirements EN 12732, Gas infrastructure — Welding steel pipework — Functional requirements SIST EN 12583:2014

EN 12583:2014 (E) 7 EN 14505, Cathodic protection of complex structures EN 60079-10-1, Explosive atmospheres — Part 10-1: Classification of areas — Explosive gas atmospheres (IEC 60079-10-1) EN 60079-20-1, Explosive atmospheres — Part 20-1: Material characteristics for gas and vapour classification — Test methods and data (IEC 60079-20-1) EN 61000-6-2, Electromagnetic compatibility (EMC) — Part 6-2: Generic standards — Immunity for industrial environments (IEC 61000-6-2) EN 61000-6-4, Electromagnetic compatibility (EMC) — Part 6-4: Generic standards — Emission standard for industrial environments (IEC 61000-6-4) EN 61508 (all parts), Functional safety of electrical/electronic/programmable electronic safety-related systems (IEC 61508 (all parts)) EN 61511 (all parts), Functional safety — Safety instrumented systems for the process industry sector (IEC 61511 (all parts)) EN ISO 10437, Petroleum, petrochemical and natural gas industries — Steam turbines — Special-purpose applications (ISO 10437) EN ISO 10439, Petroleum, chemical and gas service industries — Centrifugal compressors (ISO 10439) EN ISO 13849-1, Safety of machinery — Safety-related parts of control systems — Part 1: General principles for design (ISO 13849-1) ISO 3977-1, Gas turbines — Procurement — Part 1: General introduction and definitions ISO 3977-2, Gas turbines — Procurement — Part 2: Standard reference conditions and ratings ISO 13707, Petroleum and natural gas industries — Reciprocating compressors 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 alarm signal provided to an operator which indicates the approach or the presence of an unwanted event 3.2 availability ability to be in a state to perform as and when required under given, assuming that the required external resources are provided Note 1 to entry: This ability depends on the combined aspects of the reliability, the maintainability and recoverability of the item and the maintenance supportability. Note 2 to entry: Required external resources, other than maintenance resources, do not affect the availability of the item although the item may not be available from the user’s viewpoint. [SOURCE: EN 13306:2010, 4.1, modified − definition altered and original Note 3 not quoted here] SIST EN 12583:2014

EN 12583:2014 (E) 8 3.3 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 3.4 compressor surge flow and/or pressure instability including reverse flow inside a compressor 3.5 compressor unit set of driver package, gas compressor, control system and their auxiliary equipment which includes unit valves and associated pipework to compress gas Note 1 to entry: Boundary compressor unit / compressor, see Annex D. 3.6 compressor unit building structure where one or more drivers with compressors and auxiliary equipment are installed Note 1 to entry: Operation and maintenance are normally carried out inside the building. Note 2 to entry: Temporary partitions could be installed to isolate a compressor unit during maintenance (see Figure 2). 3.7 compressor unit housing structure to contain the compressor unit which can consist of compressor unit building, enclosure or a combination of both 3.8 control room room housing the control system from which the station personnel can, when necessary, take action on the process 3.9 decommissioning activities required to take out of service any pipework, stations, equipment or assemblies filled with gas and to disconnect them from the system 3.10 design pressure DP pressure on which design calculations are based 3.11 design temperature DT temperature on which design calculations are based 3.12 disposal activities to be performed after components of a decommissioned gas compressor station have been dismantled SIST EN 12583:2014

EN 12583:2014 (E) 9 3.13 emergency situation which could affect the safe operation of the gas infrastructure and/or the safety of the surrounding area, requiring urgent action 3.14 emergency shut down ESD actions, in the event of an emergency, to bring the station and/or the compressor unit(s) into a safe condition which requires local manual resetting 3.15 enclosure structure (a close framework) to surround a driver and/or a compressor and some of their auxiliary equipment in order to protect them from outside influence and avoid possible hazards to personnel Note 1 to entry: Enclosures could be installed inside the compressor unit building to confine part of a compressor unit (see Figure 2). SIST EN 12583:2014

EN 12583:2014 (E) 10

Key 1 enclosure 2 building 3 walls or temporary partitions 4 driver 5 compressor Figure 2 — Compressor unit housing SIST EN 12583:2014

EN 12583:2014 (E) 11 3.16 fail-safe system system where loss of power or actuating fluid to any control element, for example an individual relay, valve, actuator, etc. or any failure of these to operate when energized, leads to a safe condition Note 1 to entry: In particular, all fault shut-down systems operate by de-energizing and not energizing components. 3.17 fuel gas system system which conditions the fuel gas prior to it entering a gas turbine or gas engine driver package Note 1 to entry: It can consist of gas filtration, scrubbing, heating, pressure regulating, metering and compression. 3.18 gas gaseous fuel which is in gaseous state at a temperature of 15 °C under atmospheric pressure (1,013 25 bar absolute) 3.19 gas compressor station installation used for: — transporting gas in pipelines; — compressing gas from a pipeline to a gas storage facility or vice versa Note 1 to entry: More than one of the above functions could be performed simultaneously or alternately. 3.20 gas infrastructure pipeline system including pipework and associated stations or plants for the transmission and distribution of gas 3.21 hazardous area area in which an explosive 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 60079-10-1:2008] 3.22 incident unexpected o

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