EN 437:2021
(Main)Test gases - Test pressures - Appliance categories
Test gases - Test pressures - Appliance categories
This document specifies the test gases, test pressures and categories of appliances relative to the use of gaseous fuels of the first, second and third families. It serves as a reference document in the specific standards for appliances.
The document makes recommendations for the use of the gases and pressures to be applied for the tests of appliances burning gaseous fuels.
NOTE Procedures for tests are given in the corresponding appliance standards. The test gases and the test pressures specified in this standard are in principle intended to be used with all types of appliances.
However, the use of some test gases and test pressures may not be appropriate in the following cases:
- appliances with nominal heat input greater than 300 kW;
- appliances constructed on site;
- appliances in which the final design is influenced by the user;
- appliances constructed for use with high supply pressures (notably direct use of the saturated vapour pressure).
In these cases, the specific appliance standards may specify other test conditions in order to establish compliance with their requirements.
Prüfgase - Prüfdrücke - Gerätekategorien
Dieses Dokument legt die Prüfgase, Prüfdrücke und Gerätekategorien für die Verwendung von Brenngasen der ersten, zweiten und dritten Gasfamilie fest. Es dient als Referenzdokument für die speziellen Gerätenormen.
Das Dokument enthält Empfehlungen zur Verwendung von Gasen und Drücken bei der Durchführung der Prüfungen. Das vollständige Verfahren wird in den entsprechenden Gerätenormen angegeben.
ANMERKUNG Prüfverfahren werden in den zugehörigen Gerätenormen angegeben. Die Prüfgase und Prüfdrücke, die in dieser Norm festgelegt werden, sind im Prinzip für sämtliche Geräte bestimmt.
Die Verwendung der Prüfgase und Prüfdrücke kann jedoch in folgenden Fällen nicht geeignet sein:
- Geräte mit einer Nennwärmebelastung über 300 kW;
- Geräte, die vor Ort erstellt werden;
- Geräte, deren Endausführung durch den Benutzer beeinflusst wird;
- Geräte, die für einen Betrieb bei hohen Versorgungsdrücken ausgelegt sind (insbesondere die direkte Verwendung des gesättigten Dampfdruckes).
In diesen Fällen können die einzelnen Gerätenormen weitere Prüfbedingungen festlegen, um die Konformität mit den Anforderungen der entsprechenden Normen sicherzustellen.
Gaz d'essais - Pressions d'essais - Catégories d'appareils
Le présent document définit les gaz d'essai, pressions d'essai et catégories d'appareils relatifs à l'utilisation de combustibles gazeux des première, deuxième et troisième familles. Il sert de document de référence dans les normes particulières d'appareils.
Le document donne des recommandations pour l'utilisation des gaz et pressions à appliquer pour les essais des appareils brûlant des combustibles gazeux.
NOTE Les modes opératoires pour les essais sont donnés dans les normes relatives aux appareils. Les gaz d'essai et les pressions d'essai spécifiés dans la présente norme sont, en principe, destinés à être utilisés avec tous les types d'appareils. .
Néanmoins, l'utilisation de certains gaz d'essai et pressions d'essai peut ne pas être appropriée avec les appareils suivants :
- appareils de débit calorifique nominal supérieur à 300 kW ;
- appareils construits sur site ;
- appareils dont la conception finale est influencée par l'utilisateur ;
- appareils construits pour utilisation avec de hautes pressions d'alimentation (notamment utilisation directe de la pression de vapeur saturante).
Dans ces cas, les normes particulières relatives aux appareils peuvent spécifier d'autres conditions d'essais afin d'établir la conformité avec leurs exigences.
Preskusni plini - Preskusni tlaki - Kategorije naprav
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2021
Nadomešča:
SIST EN 437:2019
Preskusni plini - Preskusni tlaki - Kategorije naprav
Test gases - Test pressures - Appliance categories
Prüfgase - Prüfdrücke - Gerätekategorien
Gaz d'essais - Pressions d'essais - Catégories d'appareils
Ta slovenski standard je istoveten z: EN 437:2021
ICS:
27.060.20 Plinski gorilniki Gas fuel burners
91.140.40 Sistemi za oskrbo s plinom Gas supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 437
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2021
EUROPÄISCHE NORM
ICS 27.060.20; 91.140.40 Supersedes EN 437:2018
English Version
Test gases - Test pressures - Appliance categories
Gaz d'essais - Pressions d'essais - Catégories Prüfgase - Prüfdrücke - Gerätekategorien
d'appareils
This European Standard was approved by CEN on 19 January 2021.
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, 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.
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. EN 437:2021 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Gases . 7
4.1 Classification in gas families and groups . 7
4.2 Test gases . 8
5 Test pressures . 12
6 Classification of appliances . 14
6.1 Appliance categories . 14
6.1.1 General . 14
6.1.2 Category I . 14
6.1.3 Category II . 15
6.1.4 Category III . 16
6.2 Operations permitted for a change of gas or pressure, adjustment and regulating
devices . 16
7 Choice of test gases and test pressures . 17
8 Marking . 18
Annex A (normative) Conditions for preparation of the test gases . 19
Annex B (informative) National situations . 20
B.1 General . 20
B.2 Categories listed in the body of the standard marketed in the different countries . 20
B.3 Appliance supply pressures corresponding to the categories given in B.1 and B.2 . 23
B.4 Special categories marketed nationally or locally . 27
B.4.1 General . 27
B.4.2 Categories . 33
B.5 Test gases and test pressures corresponding to the special categories given in B.4 . 40
B.6 Special conditions . 47
B.7 National and local gas distribution specifications relevant for defining appliance
categories given in B.4 . 54
Annex C (informative) Guidelines for extension to other categories . 55
Annex D (informative) Relationship between the distributed gases and the corresponding test
gases . 56
Bibliography . 57
European foreword
This document (EN 437:2021) has been prepared by Technical Committee CEN/TC 238 “Test gases, test
pressures, appliance categories and gas appliance types”, the secretariat of which is held by AFNOR.
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 October 2021, and conflicting national standards shall be withdrawn
at the latest by October 2021.
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 437:2018.
EN 437 is intended to provide all the CEN Technical Committees preparing standards on gas appliances with
definitions for test gases, test pressures and categories of appliances for use by these committees within the
limits of the scope defined in Clause 1.
The document seeks to clarify the present situation with respect to test gases, test pressures and appliance
categories.
The concern for clarity has led to the elucidation of numerous categories and national situations or
conditions. The complexity of the document is likely to increase as new members join the Union.
This document can be considered as an important stage in the harmonization of test gases, test pressures and
appliance categories and the quality of information on gas usage in Europe.
In comparison with the previous version, this document incorporates updates of Table 6, Table 7, Table B.4
and some editorial changes.
Annex B gives national situations relating to gases, gas pressures and appliance categories that apply
nationally or locally. The information provided is included under the responsibility of the national
standardization bodies. The tables of Annex B give the available information. Therefore, Annex B is
informative.
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, 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 the United Kingdom.
1 Scope
This document specifies the test gases, test pressures and categories of appliances relative to the use of
gaseous fuels of the first, second and third families. It serves as a reference document in the specific standards
for appliances.
The document makes recommendations for the use of the gases and pressures to be applied for the tests of
appliances burning gaseous fuels.
NOTE Procedures for tests are given in the corresponding appliance standards. The test gases and the test
pressures specified in this standard are in principle intended to be used with all types of appliances.
However, the use of some test gases and test pressures may not be appropriate in the following cases:
— appliances with nominal heat input greater than 300 kW;
— appliances constructed on site;
— appliances in which the final design is influenced by the user;
— appliances constructed for use with high supply pressures (notably direct use of the saturated vapour
pressure).
In these cases, the specific appliance standards may specify other test conditions in order to establish
compliance with their requirements.
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 ISO 3166-1:2020, Codes for the representation of names of countries and their subdivisions - Part 1: Country
code (ISO 3166-1:2020)
EN ISO 6976:2016, Natural gas - Calculation of calorific values, density, relative density and Wobbe indices from
composition (ISO 6976:2016)
3 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 https://www.iso.org/obp
3.1
gas appliance
appliance burning gaseous fuels
Note 1 to entry: For the purposes of this standard the term “gaseous fuels” means any fuel which is in a gaseous state
at a temperature of 15 °C under an absolute pressure of 1 bar.
3.2
distributed gas
gaseous fuel used on the territory of a CEN member
3.3
test gas
gases intended for the verification of the operational characteristics of gas appliances
Note 1 to entry: Test gases include reference and limit gases.
3.4
reference gas
test gas with which appliances operate under nominal conditions when they are supplied at the
corresponding normal pressure
3.5
limit gas
test gas representative of the extreme variations in the characteristics of the gases for which appliances have
been designed
3.6
test pressure
gas pressure used to verify the operational characteristics of gas appliances, consisting of normal and limit
pressures
Note 1 to entry: Gas pressure is expressed in millibars (mbar) 1 mbar = 10 Pa.
3.7
normal pressure
p
n
pressure under which the appliances operate in nominal conditions when they are supplied with the
corresponding reference gas
3.8
limit pressure
pressure representative of the extreme variations in the appliance supply conditions
Note 1 to entry: Limit pressures comprise a maximum pressure p and a minimum pressure p .
max min
3.9
pressure couple
combination of two distinct gas distribution pressures applied by reason of the significant difference existing
between the Wobbe indices within a single family or group in which
— the higher pressure corresponds only to gases of low Wobbe index;
— the lower pressure corresponds to gases of high Wobbe index.
Note 1 to entry: The pressure couple is indicated by using the symbol (⇆).
3.10
reference conditions
conditions which correspond to 15 °C, 1 013, 25 mbar, unless otherwise specified
3.11
relative density
d
ratio of the masses of equal volumes of dry gas and dry air under the same conditions of temperature and
pressure: 15 °C or 0 °C and 1 013, 25 mbar
3.12
calorific value
quantity of heat produced by the complete combustion, at a constant pressure equal to 1 013,25 mbar, of a
unit volume or mass of gas, the constituents of the combustible mixture being taken at reference conditions
and the products of combustion being brought b
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.