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, hereinafter 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 437:2021, 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.
Clauses 1 to 7 and Annex B are for design and type testing only, with the exception of 6.2.4.3, 6.2.5.3, 6.7.1.2.2 and 6.7.2.2.2. Annex C can be used to provide guidance on periodic tests during use. Clause 8 and Annexes D and E are for each meter prior to dispatch. Annex A is intended to be used for both type and individual testing. Annex F is intended to be used for individual testing. Annex G is intended to be used for design.

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 437:2021 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.
Abschnitt 1 bis Abschnitt 7 sowie Anhang B gelten nur für Konstruktion und Typprüfung, mit Ausnahme von 6.2.4.3, 6.2.5.3, 6.7.1.2.2 und 6.7.2.2.2. Anhang C kann als Anleitung zu wiederkehrenden Prüfungen während des Betriebes verwendet werden. Abschnitt 8 und die Anhänge D und E gelten für jeden Zähler vor dem Versand. Anhang A ist für die Anwendung sowohl bei der Typprüfung als auch bei der Einzelprüfung vorgesehen. Anhang F ist für die Anwendung bei der Einzelprüfung vorgesehen. Anhang G ist für die Anwendung bei der Konstruktion vorgesehen.

Compteurs de gaz - Compteurs de gaz à turbine

Le présent 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 le mesurage de débit des gaz.
Le présent 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 437:2021, 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 températures d'environnement climatique d'au moins 50 K.
Le présent 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 fabricant 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.
Les Articles 1 à 7 ainsi que l'Annexe B concernent uniquement les essais de conception et de type, à l'exception de 6.2.4.3, 6.2.5.3, 6.7.1.2.2 et 6.7.2.2.2. L'Annexe C peut servir de recommandations pour les essais périodiques pendant utilisation. L'Article 8 et les Annexes D et E s'appliquent à chaque compteur avant livraison. L'Annexe A est destinée à être appliquée à la fois aux essais de type et aux essais individuels. L'Annexe F est destinée à être appliquée aux essais individuels. L'Annexe G est destinée à être appliquée à la conception.

Plinomeri - Turbinski plinomeri

General Information

Status
Not Published
Technical Committee
Current Stage
4060 - Closure of enquiry - Enquiry
Due Date
18-Nov-2021
Completion Date
18-Nov-2021

RELATIONS

Effective Date
15-Jul-2018

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SLOVENSKI STANDARD
oSIST prEN 12261:2021
01-september-2021
Plinomeri - Turbinski plinomeri
Gas meters - Turbine gas meters
Gaszähler - Turbinenradgaszähler
Compteurs de gaz - Compteurs de gaz à turbine
Ta slovenski standard je istoveten z: prEN 12261
ICS:
91.140.40 Sistemi za oskrbo s plinom Gas supply systems
oSIST prEN 12261:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 12261:2021
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oSIST prEN 12261:2021
DRAFT
EUROPEAN STANDARD
prEN 12261
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2021
ICS 91.140.40 Will supersede EN 12261:2018
English Version
Gas meters - Turbine gas meters
Compteurs de gaz - Compteurs de gaz à turbine Gaszähler - Turbinenradgaszähler

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 237.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations

which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other

language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC

Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12261:2021 E

worldwide for CEN national Members.
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oSIST prEN 12261:2021
prEN 12261:2021 (E)
Contents Page

European foreword ............................................................................................................................................ 6

1 Scope .......................................................................................................................................................... 7

2 Normative references .......................................................................................................................... 7

3 Terms, definitions and symbols ...................................................................................................... 9

3.1 Terms and definitions ......................................................................................................................... 9

3.2 Symbols ................................................................................................................................................. 12

4 Meter classification ........................................................................................................................... 13

4.1 General................................................................................................................................................... 13

4.2 Flange pressure ratings ................................................................................................................... 13

4.3 Gas meter sizes, rangeability and connection diameter sizes ........................................... 14

4.4 Connections and dimensions ......................................................................................................... 15

4.5 Temperature ranges ......................................................................................................................... 16

4.6 Climatic environment ....................................................................................................................... 16

5 Metrological performance requirements ................................................................................. 16

5.1 General................................................................................................................................................... 16

5.2 Type testing .......................................................................................................................................... 16

5.2.1 Error of indication ............................................................................................................................. 16

5.2.2 Metrological stability ........................................................................................................................ 18

5.2.3 Linearity ................................................................................................................................................ 18

5.2.4 Endurance ............................................................................................................................................. 19

5.2.5 Meter position ..................................................................................................................................... 19

5.2.6 Temporary overload ......................................................................................................................... 20

5.2.7 Temperature range ........................................................................................................................... 20

5.2.8 Installation conditions ..................................................................................................................... 21

5.2.9 Maximum permissible pressure loss .......................................................................................... 21

5.2.10 Output shaft (where fitted) ............................................................................................................ 22

6 Design, material requirements and manufacturing .............................................................. 22

6.1 General................................................................................................................................................... 22

6.2 Robustness ........................................................................................................................................... 23

6.2.1 General................................................................................................................................................... 23

6.2.2 Materials for pressurized parts .................................................................................................... 23

6.2.3 Welded joint coefficient ................................................................................................................... 23

6.2.4 Resistance to internal pressure .................................................................................................... 24

6.2.5 External leak tightness .................................................................................................................... 25

6.2.6 Bending and torsional moment .................................................................................................... 25

6.2.7 Resistance to impact ......................................................................................................................... 27

6.2.8 Transportation and storage ........................................................................................................... 27

6.3 Manufacturing ..................................................................................................................................... 28

6.4 Resistance to environmental conditions ................................................................................... 28

6.4.1 General................................................................................................................................................... 28

6.4.2 Resistance to ultraviolet radiation .............................................................................................. 28

6.4.3 Resistance to external corrosion ................................................................................................. 29

6.5 Removable meter mechanisms ..................................................................................................... 31

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oSIST prEN 12261:2021
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6.5.1 Integrity ................................................................................................................................................ 31

6.5.2 Performance ........................................................................................................................................ 32

6.6 Indicating devices and accessories ............................................................................................. 32

6.6.1 General .................................................................................................................................................. 32

6.6.2 Magnetic drive units ......................................................................................................................... 33

6.7 Pressure and temperature tappings ........................................................................................... 33

6.7.1 Pressure tappings .............................................................................................................................. 33

6.7.2 Temperature tappings ..................................................................................................................... 34

6.8 Lubrication ........................................................................................................................................... 34

6.8.1 Requirements ...................................................................................................................................... 34

6.8.2 Type test ................................................................................................................................................ 35

7 Meter output ........................................................................................................................................ 35

7.1 General .................................................................................................................................................. 35

7.2 Indicating device ................................................................................................................................ 35

7.2.1 General .................................................................................................................................................. 35

7.2.2 Capacity ................................................................................................................................................. 35

7.2.3 Unit of indication ............................................................................................................................... 35

7.2.4 Readability ........................................................................................................................................... 36

7.2.5 Adjustment ........................................................................................................................................... 36

7.3 Pulse generator .................................................................................................................................. 36

7.3.1 General .................................................................................................................................................. 36

7.3.2 Electrical specifications for pulse generators ......................................................................... 37

7.3.3 Electrical connections ...................................................................................................................... 37

7.4 Output shaft ......................................................................................................................................... 37

7.5 Test element ........................................................................................................................................ 38

7.5.1 General provisions ............................................................................................................................ 38

7.5.2 Test element in case of mechanical indicating device ......................................................... 38

7.5.3 Pulse generator used as test element......................................................................................... 39

8 Marking ................................................................................................................................................. 39

8.1 General .................................................................................................................................................. 39

8.2 Data plate .............................................................................................................................................. 39

8.3 Direction of flow ................................................................................................................................. 39

8.4 Working position ............................................................................................................................... 39

8.5 Other connections ............................................................................................................................. 40

8.5.1 General .................................................................................................................................................. 40

8.5.2 Pressure tappings .............................................................................................................................. 40

8.5.3 Pulse generators ................................................................................................................................ 40

8.5.4 Output shafts ....................................................................................................................................... 40

9 Documentation ................................................................................................................................... 40

9.1 General .................................................................................................................................................. 40

9.2 Declaration of conformity .............................................................................................................. 40

9.3 Instruction manual ........................................................................................................................... 41

Annex A (normative) Test facility specifications .................................................................................. 42

A.1 Test medium ........................................................................................................................................ 42

A.2 Leakage.................................................................................................................................................. 42

A.3 Installation conditions ..................................................................................................................... 42

A.4 Reference standards ......................................................................................................................... 42

Annex B (normative) Perturbation testing ............................................................................................. 43

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oSIST prEN 12261:2021
prEN 12261:2021 (E)

B.1 General ................................................................................................................................................... 43

B.2 Terms and definitions ...................................................................................................................... 43

B.3 Requirements ...................................................................................................................................... 43

B.3.1 Low level perturbation .................................................................................................................... 43

B.3.2 High level perturbation ................................................................................................................... 44

B.4 Tests ........................................................................................................................................................ 44

B.4.1 Low level perturbations .................................................................................................................. 44

B.4.2 High level perturbations ................................................................................................................. 46

B.5 Similarity .............................................................................................................................................. 47

B.6 Flow conditioner ................................................................................................................................ 47

Annex C (informative) Recommendations for use ................................................................................ 49

C.1 Pressure loss ........................................................................................................................................ 49

C.2 Spin test ................................................................................................................................................. 49

C.3 Locations of temperature measuring devices ......................................................................... 49

Annex D (normative) Individual factory testing .................................................................................... 50

D.1 General ................................................................................................................................................... 50

D.2 Meter report ........................................................................................................................................ 50

Annex E (normative) Metrological requirements and tests for each meter prior to dispatch

(Individual meter testing) .............................................................................................................. 51

E.1 Information required from the purchaser (user) .................................................................. 51

E.2 Determination of number of tests ............................................................................................... 51

E.2.1 Criteria ................................................................................................................................................... 51

E.3 Error of indication ............................................................................................................................. 52

E.3.1 Requirements ...................................................................................................................................... 52

E.3.2 Test .......................................................................................................................................................... 52

E.4 Linearity ................................................................................................................................................ 53

E.4.1 Requirements ...................................................................................................................................... 53

E.4.2 Test .......................................................................................................................................................... 53

E.5 WME ........................................................................................................................................................ 53

E.5.1 Requirement ........................................................................................................................................ 53

E.5.2 Test .......................................................................................................................................................... 53

E.5.3 Adjustment ........................................................................................................................................... 54

E.6 Data plate specification ................................................................................................................... 54

E.7 Test certificate .................................................................................................................................... 54

Annex F (normative) Compliance evaluation for gas meters ............................................................ 55

F.1 General ................................................................................................................................................... 55

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prEN 12261:2021 (E)

F.2 Quality Management System ......................................................................................................... 55

F.2.1 General .................................................................................................................................................. 55

F.2.2 Manufacturer’s compliance evaluation ..................................................................................... 55

F.2.3 Issue of the certificate of compliance ......................................................................................... 55

Annex G (normative) Materials for pressurized parts ........................................................................ 56

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of Directive 2014/32/EU Measuring Instruments Directive aimed to

be covered ............................................................................................................................................ 58

Annex ZB (informative) Relationship between this European Standard and the essential

requirements of Directive 2014/68/EU aimed to be covered .......................................... 63

Bibliography ...................................................................................................................................................... 65

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oSIST prEN 12261:2021
prEN 12261:2021 (E)
European foreword

This document (prEN 12261:2021) has been prepared by Technical Committee CEN/TC 237 “Gas

meters”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12261:2018.
The main changes compared to the previous edition are listed below:
— Harmonization with PED;
— Clause 6 reworked completely;
— Annex G added;
— Annex ZB added.

This document has been prepared under a Standardization Request given to CEN by the European

Commission and the European Free Trade Association, and supports essential requirements of EU

Directive(s) / Regulation(s).

For relationship with EU Directive(s) / Regulation(s), see informative Annex ZA or Annex ZB, which is

an integral part of this document.

In the preparation of this document, the content of ISO 9951:1993, 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 document might be subject to amendments to bring it into line with the

proposed Measuring Instruments Directive (MID).

Electronic Indexes are not specifically covered by this document, however, work to produce a standard

covering these devices is in progress under CEN/TC 237.
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oSIST prEN 12261:2021
prEN 12261:2021 (E)
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, hereinafter referred to as a meter(s), having in-line pipe connections for gas flow

measurement.
st nd

This document applies to turbine gas meters used to measure the volume of fuel gases of the 1 and 2

gas families, the composition of which is specified in EN 437:2021, at maximum working pressures up

to 420 bar, actual flow rates up to 25 000 m /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.

Clauses 1 to 7 and Annex B are for design and type testing only, with the exception of 6.2.4.3, 6.2.5.3,

6.7.1.2.2 and 6.7.2.2.2. Annex C can be used to provide guidance on periodic tests during use. Clause 8

and Annexes D and E are for each meter prior to dispatch. Annex A is intended to be used for both type

and individual testing. Annex F is intended to be used for individual testing. Annex G is intended to be

used for design.
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 1092-1:2018, Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN

designated - Part 1: Steel flanges

EN 1092-2:1997, Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN

designated - Part 2: Cast iron flanges

EN 1092-3:2003, Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN

designated - Part 3: Copper alloy flanges
As impacted by corrigendum EN 1092-3:2003/AC:2007.
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oSIST prEN 12261:2021
prEN 12261:2021 (E)

EN 1092-4:2002, Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories, PN

designated - Part 4: Aluminium alloy flanges

EN 1759-1:2004, Flanges and their joint - Circular flanges for pipes, valves, fittings and accessories, Class

designated - Part 1: Steel flanges, NPS 1/2 to 24

EN 1759-3:2003, Flanges and their joints - Circular flanges for pipes, valves, fittings and accessories,

Class designated - Part 3: Copper alloy flanges

EN 1759-4:2003, Flanges and their joint - Circular flanges for pipes, valves, fittings and accessories, class

designated - Part 4: Aluminium alloy flanges
EN 10204:2004, 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 IEC 60079-0:2018, Explosive atmospheres - Part 0: Equipment - General requirements (IEC 60079-

0:2017)

EN 60079-11:2012, Explosive atmospheres - Part 11: Equipment protection by intrinsic safety “i”

(IEC 60079-11:2011)

EN 60529:1991, Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989)

EN 60947-5-6:2000, 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-

6:1999)

EN 62246-1:2015, Reed switches - Part 1: Generic specification (IEC 62246-1:2015)

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)

EN ISO 9606-1:2017, Qualification testing of welders - Fusion welding - Part 1: Steels (ISO 9606-1:2012

including Cor 1:2012 and Cor 2:2013)
EN ISO 9606-2:2004, Qualific
...

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