Gas meters - Turbine gas meters

This document specifies the measuring conditions, requirements and tests for the construction, performance and safety of class 1,0 axial and radial turbine gas meters with mechanical indicating devices, herein after referred to as a meter(s), having in-line pipe connections for gas flow measurement.
This document applies to turbine gas meters used to measure the volume of fuel gases of the 1st and 2nd gas families, the composition of which is specified in EN 437, at maximum working pressures up to 420 bar, actual flow rates up to 25 000 m³/h over a gas temperature range of at least 40 K and for a climatic environmental temperature range of at least 50 K.
This document applies to meters that are installed in locations with vibration and shocks of low significance and in
-   closed locations (indoor or outdoor with protection as specified by the manufacturer) with condensing or with non-condensing humidity
or, if specified by the manufacturer,
-   open locations (outdoor without any covering) with condensing humidity or with non-condensing humidity
and in locations with electromagnetic disturbances.
Unless otherwise specified in this document:
-   all pressures used are gauge;
-   all influence quantities, except the one under test, are kept relatively constant at their reference value.

Gaszähler - Turbinenradgaszähler

Dieses Dokument beschreibt die Messbedingungen, Anforderungen und Prüfungen hinsichtlich Konstruktion, Leistung und Sicherheit von axialen und radialen Klasse-1,0-Turbinenradgaszählern mit mechanischen Anzeigegeräten (im Folgenden „Zähler“ genannt) mit in der Hauptleitung liegenden Anschlüssen zur Durchflussmessung.
Dieses Dokument gilt für Turbinenradgaszähler, die zur Volumenmessung von Brenngasen der 1. und 2. Gasfamilie, deren Zusammensetzung in EN 437 angegeben ist, bei maximalen Arbeitsdrücken bis zu 420 bar, Betriebsdurchflüssen bis zu 25 000 m3/h über einen Gastemperaturbereich von mindestens 40 K und einem Umgebungstemperaturbereich von mindestens 50 K benutzt werden.
Dieses Dokument gilt für Zähler an Standorten, an denen unbedeutende Vibrationen und Stöße auftreten können, sowie an
—   geschlossenen Standorten (innen oder außen mit dem vom Hersteller vorgeschriebenen Schutz) mit oder ohne Betauung
oder, bei entsprechender Angabe durch den Hersteller, an
—   offenen Standorten (außen ohne Abdeckung) mit oder ohne Betauung
und an Standorten mit elektromagnetischen Störungen.
Soweit in diesem Dokument nicht anders angegeben:
—   sind alle dargestellten Drücke als Überdrücke zu verstehen;
—   werden alle Einflussgrößen außer der geprüften Einflussgröße relativ konstant bei ihrem Referenzwert gehalten.

Compteurs de gaz - Compteurs de gaz à turbine

Ce document définit les conditions de mesure, les exigences et les essais applicables à la construction, à la performance et à la sécurité des compteurs de gaz à turbine axiale et radiale de classe 1,0 munis d’indicateurs mécaniques, désignés ci-après sous l’appellation « compteurs », ayant des raccordements sur des canalisations en ligne pour mesure de débit des gaz.
Ce document s'applique aux compteurs de gaz à turbine utilisés pour mesurer le volume des gaz combustibles des 1ère et 2ème familles de gaz, dont la composition est spécifiée dans l’EN 437, à des pressions maximales de service allant jusqu'à 420 bar, à des débits réels allant jusqu'à 25 000 m³/h sur une plage de températures du gaz d’au moins 40 K et une plage de température d’environnement climatique d’au moins 50 K.
Ce document s'applique aux compteurs installés dans des emplacements où les vibrations et les chocs sont peu importants et :
-   dans des emplacements fermés (en intérieur ou en extérieur avec la protection spécifiée par le fabricant) avec ou sans condensation d'humidité ;
ou, si le constructeur le spécifie,
-   dans des emplacements ouverts (en extérieur sans protection) avec ou sans condensation d'humidité ;
ainsi que dans des emplacements avec interférences électromagnétiques.
Sauf spécification contraire dans le présent document :
-   toutes les pressions utilisées sont des pressions relatives ;
-   toutes les grandeurs d'influence, sauf celle qui est soumise à l'essai, sont maintenues relativement constantes à leur valeur de référence.

Plinomeri - Turbinski plinomeri

Ta dokument določa pogoje, zahteve, preskuse in pogoje merjenja za gradnjo, delovanje in varnost aksialnih in radialnih turbinskih plinomerov razreda 1,0 z mehanskimi kazalnimi napravami, v nadaljnjem besedilu merilniki, s serijskimi cevnimi priključki za merjenje pretoka plina.
Ta dokument se nanaša na turbinske plinomere, ki se uporabljajo za merjenje prostornine gorivnih plinov iz 1. in 2. družine, katerih sestava je določena v EN 437, pri največjem delovnem tlaku do 420 bar, dejanski hitrosti pretoka do 25 000 m3/h pri temperaturi plina preko 40 K in za klimatsko okoljsko temperaturo vsaj 50 K.
Ta dokument se nanaša na merilnike, ki so nameščeni na mestih, kjer so prisotni tresljaji in udarci majhnega pomena in v
– zaprtih lokacijah (znotraj ali na prostem z zaščito, kot jo določa proizvajalec) s kondenzirano ali nekondenzirano vlago, ali, če je tako določil proizvajalec,
– odprtih lokacijah (na prostem brez kakršnega koli prekritja) s kondenzirano ali nekondenzirano vlago in na lokacijah z elektromagnetnimi motnjami.
Razen če ni drugače določeno v tem dokumentu, velja:
– vsi uporabljeni tlaki so merjeni;
– vse vplivne količine, razen tistih, ki se preizkušajo, so pri njihovi referenčni vrednosti relativno konstantne.

General Information

Status
Published
Publication Date
27-Mar-2018
Technical Committee
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
28-Mar-2018
Completion Date
28-Mar-2018

RELATIONS

Effective Date
01-Feb-2017
Effective Date
04-Apr-2018
Effective Date
15-Jul-2018

Buy Standard

Standard
EN 12261:2018
English language
60 pages
sale 10% off
Preview
sale 10% off
Preview

e-Library read for
1 day

Standards Content (sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Plinomeri - Turbinski plinomeriGaszähler - TurbinenradgaszählerCompteurs de gaz - Compteurs de gaz à turbineGas meters - Turbine gas meters91.140.40Sistemi za oskrbo s plinomGas supply systemsICS:Ta slovenski standard je istoveten z:EN 12261:2018SIST EN 12261:2018en,fr,de01-maj-2018SIST EN 12261:2018SLOVENSKI

STANDARDSIST EN 12261:2004/AC:2004SIST EN 12261:2004/A1:2006SIST EN 12261:20041DGRPHãþD

SIST EN 12261:2018
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12261
March
t r s z ICS
{ sä s v rä v r Supersedes EN
s t t x sã t r r tEnglish Version
Gas meters æ Turbine gas meters Compteurs de gaz æ Compteurs de gaz à turbine
Gaszähler æ Turbinenradgaszähler This European Standard was approved by CEN on
{ November
t r s yä

egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä

translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä

CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä

EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre:
Rue de la Science 23,
B-1040 Brussels

t r s z CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN

s t t x sã t r s z ESIST EN 12261:2018

EN 12261:2018 (E) 2 Contents Page European foreword ................................................................................................................................................................ 5 1 Scope ............................................................................................................................................................................. 6 2 Normative references ............................................................................................................................................. 6 3 Terms, definitions and symbols .......................................................................................................................... 7 3.1 Terms and definitions ............................................................................................................................................ 7 3.2 Symbols ..................................................................................................................................................................... 10 4 Meter classification .............................................................................................................................................. 11 4.1 Flange pressure ratings ...................................................................................................................................... 11 4.2 Gas meter sizes, rangeability and connection diameter sizes .............................................................. 12 4.3 Connections and dimensions ............................................................................................................................ 13 4.4 Temperature ranges ............................................................................................................................................ 13 4.5 Climatic environment .......................................................................................................................................... 13 5 Metrological performance requirements ..................................................................................................... 13 5.1 General ...................................................................................................................................................................... 13 5.2 Type testing ............................................................................................................................................................. 14 5.2.1 Error of indication ................................................................................................................................................ 14 5.2.2 Metrological stability ........................................................................................................................................... 15 5.2.3 Linearity ................................................................................................................................................................... 16 5.2.4 Endurance ................................................................................................................................................................ 16 5.2.5 Meter position ........................................................................................................................................................ 17 5.2.6 Temporary overload ............................................................................................................................................ 17 5.2.7 Temperature range .............................................................................................................................................. 17 5.2.8 Installation conditions ........................................................................................................................................ 19 5.2.9 Maximum permissible pressure loss ............................................................................................................. 19 5.2.10 Output shaft (where fitted) ................................................................................................................................ 20 6 Design and material requirements ................................................................................................................. 20 6.1 General ...................................................................................................................................................................... 20 6.2 Robustness ............................................................................................................................................................... 21 6.2.1 General ...................................................................................................................................................................... 21 6.2.2 Meter casing ............................................................................................................................................................ 21 6.2.3 Resistance to internal pressure ....................................................................................................................... 21 6.2.4 External leak tightness ........................................................................................................................................ 22 6.2.5 Bending and torsional moment........................................................................................................................ 23 6.2.6 Resistance to impact ............................................................................................................................................ 24 6.2.7 Transportation and storage .............................................................................................................................. 24 6.3 Resistance to environmental conditions ...................................................................................................... 25 6.3.1 General ...................................................................................................................................................................... 25 6.3.2 Resistance to ultra-violet radiation ................................................................................................................ 25 6.3.3 Resistance to external corrosion ..................................................................................................................... 25 6.4 Removable meter mechanisms ........................................................................................................................ 28 6.4.1 Integrity .................................................................................................................................................................... 28 6.4.2 Performance ............................................................................................................................................................ 29 6.5 Indicating devices and accessories ................................................................................................................. 29 SIST EN 12261:2018

EN 12261:2018 (E) 3 6.5.1 General ...................................................................................................................................................................... 29 6.5.2 Magnetic drive units ............................................................................................................................................. 30 6.6 Pressure and temperature tappings .............................................................................................................. 30 6.6.1 Pressure tappings ................................................................................................................................................. 30 6.6.2 Temperature tappings ........................................................................................................................................ 31 6.7 Lubrication .............................................................................................................................................................. 31 6.7.1 Requirements ......................................................................................................................................................... 31 6.7.2 Type test ................................................................................................................................................................... 31 7 Meter output ........................................................................................................................................................... 32 7.1 General ...................................................................................................................................................................... 32 7.2 Indicating device ................................................................................................................................................... 32 7.2.1 General ...................................................................................................................................................................... 32 7.2.2 Capacity ..................................................................................................................................................................... 32 7.2.3 Unit of indication ................................................................................................................................................... 32 7.2.4 Readability ............................................................................................................................................................... 32 7.2.5 Adjustment .............................................................................................................................................................. 33 7.3 Pulse generator ...................................................................................................................................................... 33 7.3.1 General ...................................................................................................................................................................... 33 7.3.2 Electrical specifications for pulse generators ............................................................................................ 33 7.3.3 Electrical connections.......................................................................................................................................... 34 7.4 Output shaft ............................................................................................................................................................. 34 7.5 Test element ............................................................................................................................................................ 35 7.5.1 General provisions ................................................................................................................................................ 35 7.5.2 Test element in case of mechanical indicating device ............................................................................. 35 7.5.3 Pulse generator used as test element ............................................................................................................ 35 8 Marking ..................................................................................................................................................................... 36 8.1 General ...................................................................................................................................................................... 36 8.2 Data plate ................................................................................................................................................................. 36 8.3 Direction of flow .................................................................................................................................................... 36 8.4 Working position ................................................................................................................................................... 36 8.5 Other connections ................................................................................................................................................. 37 8.5.1 General ...................................................................................................................................................................... 37 8.5.2 Pressure tappings ................................................................................................................................................. 37 8.5.3 Pulse generators .................................................................................................................................................... 37 8.5.4 Output shafts ........................................................................................................................................................... 37 9 Documentation ....................................................................................................................................................... 37 9.1 General ...................................................................................................................................................................... 37 9.2 Declaration of conformity .................................................................................................................................. 37 9.3 Instruction manual ............................................................................................................................................... 38 Annex A (normative)

Test facility specifications ...................................................................................................... 39 A.1 Test medium ........................................................................................................................................................... 39 A.2 Leakage ..................................................................................................................................................................... 39 A.3 Installation conditions ........................................................................................................................................ 39 A.4 Reference standards ............................................................................................................................................ 39 Annex B (normative)

Perturbation testing ................................................................................................................. 40 B.1 General ...................................................................................................................................................................... 40 B.2 Terms and definitions ......................................................................................................................................... 40 SIST EN 12261:2018

EN 12261:2018 (E) 4 B.3 Requirements ......................................................................................................................................................... 40 B.3.1 Low level perturbation ........................................................................................................................................ 40 B.3.2 High level perturbation ....................................................................................................................................... 41 B.4 Tests ........................................................................................................................................................................... 41 B.4.1 Low level perturbations ...................................................................................................................................... 41 B.4.2 High level perturbations ..................................................................................................................................... 43 B.5 Similarity .................................................................................................................................................................. 44 B.6 Flow conditioner.................................................................................................................................................... 44 Annex C (informative)

Recommendations for use ................................................................................................... 46 C.1 Pressure loss ........................................................................................................................................................... 46 C.2 Spin test .................................................................................................................................................................... 46 C.3 Locations of temperature measuring devices ............................................................................................. 46 Annex D (normative)

Individual factory testing ....................................................................................................... 47 D.1 General ...................................................................................................................................................................... 47 D.2 Meter report ............................................................................................................................................................ 47 Annex E (normative)

Metrological requirements and tests for each meter prior to dispatch (Individual meter testing) ............................................................................................................... 48 E.1 Information required from the purchaser (user) ..................................................................................... 48 E.2 Determination of number of tests ................................................................................................................... 48 E.2.1 Criteria ...................................................................................................................................................................... 48 E.3 Error of indication ................................................................................................................................................ 49 E.3.1 Requirements ......................................................................................................................................................... 49 E.3.2 Test ............................................................................................................................................................................. 50 E.4 Linearity ................................................................................................................................................................... 50 E.4.1 Requirements ......................................................................................................................................................... 50 E.4.2 Test ............................................................................................................................................................................. 50 E.5 Weighted mean error (WME) ............................................................................................................................ 50 E.5.1 Requirement ........................................................................................................................................................... 50 E.5.2 Test ............................................................................................................................................................................. 50 E.5.3 Adjustment .............................................................................................................................................................. 51 E.6 Data plate specification ....................................................................................................................................... 51 E.7 Test certificate ........................................................................................................................................................ 51 Annex ZA (informative)

Relationship between this European Standard and the Essential Requirements of EU Directive 2014/32/EU Measuring Instruments Directive aimed to be covered ............................................................................................................................................. 53 Bibliography .......................................................................................................................................................................... 60

SIST EN 12261:2018

EN 12261:2018 (E) 5 European foreword This document (EN 12261:2018) has been prepared by Technical Committee CEN/TC 237 "Gas meters", the secretariat of which is held by BSI. 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 2018, and conflicting national standards shall be withdrawn at the latest by September 2018. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12261:2002. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. In the preparation of this European Standard, the content of ISO 9951, the content of OIML Publication, "International Recommendation 6" and "International Recommendation 32" and the content of member bodies national standards on turbine meters have been taken into account. The metrological aspects of this European Standard may be subject to amendments to bring it into line with the proposed Measuring Instruments Directive (MID). Electronic Indexes are not specifically covered by this standard, however, work to produce a standard covering these devices is in progress under CEN/TC 237. 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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 12261:2018

EN 12261:2018 (E) 6 1 Scope This document specifies the measuring conditions, requirements and tests for the construction, performance and safety of class 1,0 axial and radial turbine gas meters with mechanical indicating devices, herein after referred to as a meter(s), having in-line pipe connections for gas flow measurement. This document applies to turbine gas meters used to measure the volume of fuel gases of the 1st and 2nd gas families, the composition of which is specified in EN 437, at maximum working pressures up to 420 bar, actual flow rates up to 25 000 m3/h over a gas temperature range of at least 40 K and for a climatic environmental temperature range of at least 50 K. This document applies to meters that are installed in locations with vibration and shocks of low significance and in — closed locations (indoor or outdoor with protection as specified by the manufacturer) with condensing or with non-condensing humidity or, if specified by the manufacturer, — open locations (outdoor without any covering) with condensing humidity or with non-condensing humidity and in locations with electromagnetic disturbances. Unless otherwise specified in this document: — all pressures used are gauge; — all influence quantities, except the one under test, are kept relatively constant at their reference value. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 10204, Metallic products — Types of inspection documents EN 22768-1:1993, General tolerances — Part 1: Tolerances for linear and angular dimensions without individual tolerance indications (ISO 2768-1:1989) EN 60079-0, Explosive atmospheres — Part 0: Equipment — General requirements (IEC 60079-0) EN 60079-11, Explosive atmospheres — Part 11: Equipment protection by intrinsic safety “i” (IEC 60079-11) EN 60529, Degrees of protection provided by enclosures (IP Code) (IEC 60529) EN 60947-5-6, Low-voltage switchgear and controlgear — Part 5-6: Control circuit devices and switching elements — DC interface for proximity sensors and switching amplifiers (NAMUR) (IEC 60947-5-6) SIST EN 12261:2018

EN 12261:2018 (E) 7 EN 62246-1, Reed switches — Part 1: Generic specification (IEC 62246-1) EN ISO 5167-1:2003, Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full - Part 1: General principles and requirements (ISO 5167-1:2003) ISO/IEC Guide 98-3, Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) 3 Terms, definitions and symbols 3.1 Terms and definitions For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — IEC Electropedia: available at http://www.electropedia.org/

— ISO Online browsing platform: available at http://www.iso.org/obp

3.1.1 turbine gas meter measuring device in which the dynamic forces of the flowing gas cause a turbine wheel to rotate with a speed as a function of the volume flow rate. The number of revolutions of the turbine wheel is the basis for the indication of the volume passed through the meter It is designed to measure, memorize and display the volume of a fuel gas that has passed through it 3.1.2 measured quantity volume in cubic metres, at metering conditions 3.1.3 volume flow rate volume at metering conditions divided by time 3.1.4 rangeability ratio between Qmin and Qmax, i.e. the minimum and maximum flow rate respectively for which the meter performs within the maximum permissible errors 3.1.5 average velocity volume flow rate divided by the cross-sectional area of the meter connections 3.1.6 casing pressure containing structure of the meter SIST EN 12261:2018

EN 12261:2018 (E) 8 3.1.7 pressures and temperatures 3.1.7.1 metering pressure (pm) absolute gas pressure to which the indicated volume of gas is related 3.1.7.2 operating pressure gas pressure within the piping containing the meter 3.1.7.3 working pressure range allowable pressure range over which the meter is calibrated and performs within the metrological requirements 3.1.7.4 operating te

...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.