1、September 2009DEUTSCHE NORM English price group 20No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 27.060.20; 91.140.40
2、!$YU*“1545007www.din.deDDIN EN 437Test gases Test pressures Appliance categories (includes Amendment A1:2009)English version of DIN EN 437:2009-09Prfgase Prfdrcke Gertekategorien (enthlt nderung A1:2009)Englische Fassung DIN EN 437:2009-09SupersedesDIN EN 437:2003-09www.beuth.deDocument comprises pa
3、ges46DIN EN 437:2009-09 National foreword This standard has been prepared by Technical Committee CEN/TC 238 “Test gases, test pressures and categories of appliances” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was the Normenausschuss Gastechnik (Gas Technolo
4、gy Standards Committee). It is intended to include this standard in the body of Codes of practice for gas issued by the DVGW Deutscher Verein des Gas- und Wasserfaches e.V. (German Technical and Scientific Association for Gas and Water). Applying this standard When type testing gas appliances, vario
5、us gas distribution conditions are simulated using limit gases and minimum/maximum test pressures to ensure safe operation under all foreseeable conditions of distribution, taking economically viable test conditions into consideration. The reference gases represent “nominal values”, by analogy, for
6、each gas family and gas group. Reference gases and nominal supply pressures are used to determine nominal heat input, efficiency and emissions. When using gases having a quality lying between that of the limit gases and the reference gas, some parameters such as the pollutant emission content, effic
7、iency, etc. can deviate from the values obtained under nominal conditions. However, the CO content may never exceed the maximum value specified in the relevant apparatus standards. Recent developments in low-emission burners have shown that the admixture of LPG/air in natural gas as specified in DVG
8、W G 260 is not always adequately represented by the reference gases used. DIN EN 437 is to be used for all gas appliances operated with gases supplied by public distributors. The scope is limited to appliances with nominal heat input of 300 kW or lower, and to mass-produced appliances, for both tech
9、nical and practical reasons. Manufacturers of larger appliances are to use other measures for ensuring that their appliances can handle the range of variation for contracted gas quality as specified in DVGW G 260 without affecting the safety of the appliance, since gas supply conditions are the same
10、 for all appliances. This also applies to appliance standards that allow for deviations from the given reference gases and gas pressures. Reference conditions The widely-used conditions 15 C and 1 013,25 mbar have been selected here as reference conditions, although Table 4 gives the characteristics
11、 of second family reference gases for the previously used conditions 0 C and 1 013,25 mbar. Appliance categories, country of destination The appliance category indicates the gas quality for which the appliance is suitable as determined in type testing. Because supply pressures may vary from country
12、to country even for the same gas quality, it is essential that the gas pressure also be given. The suitability of the appliance for the intended distribution system can be assessed using both these values. However, giving the category and supply pressure alone does not provide enough information to
13、determine in which countries the appliance may be used. To establish the country(ies) in which the appliance may be operated, additional information is needed, such as that on the name plate, any warnings on the packaging, installation and operating instructions in the language of the country of des
14、tination, and any special national regulations regarding installation. 2 DIN EN 437:2009-09 DVGW G 260 specifies different gas quality limits than does DIN EN 437 (see diagram below). Second family gas groups Key Gasgruppen nach EN 437 = Gas groups as in EN 437 Europische Prfgase, 2. Gasfamilie = Eu
15、ropean test gases, 2ndfamily Nationale Besonderheiten DE = National situation in Germany Normprfgas nach EN 437 = Reference gas as in EN 437 Verteilte Gasarten nach DVGW-Arbeitsblatt G 260 = Gas types as in DVGW G 260 Nennwerte nach G 260 = Nominal values as in G 260 As the diagram shows, for second
16、 family gases, the H group of natural gases as in DVGW G 260 lies entirely within the E group of test gases as in DIN EN 437. This means that appliances which are suitable for Group E test gases as in this standard may also be used in Germany wherever Group H gases as in G 260 are distributed. In th
17、e informative Annex B on “National situations”, for Germany this standard designates Group L gases as in DVGW G 260 as category “LL” test gases, which cover the Wobbe index range of 10,0 kWh/m3to 13,1 kWh/m3at 0 C. Category I2Eappliances are suitable for the SRG method (Sommers-Ruhrgas method) (cf.
18、DVGW G 680), i.e. the Wobbe index of the gas supplied may briefly go down to 12 kWh/m3. However, such appliances cannot be adjusted for Group L natural gases. Category I2LLappliances adjusted for Group LL test gases or the adjustment “L” covers the entire LL range in this category. Category I2LLappl
19、iances which cannot be adjusted for Group E natural gases are not permitted. Category I2Nappliances are self-adapting appliances which can be used without adjustments for Group H, L and LL natural gases as in G 260 and which always automatically adjust to the relevant nominal heat input. Changes in
20、operating conditions (supply pressure of 17 mbar to 30 mbar, chimney drag, fluctuating net calorific values) are adjusted to within certain limits. 3 DIN EN 437:2009-09 4 Category I2Rappliances are equipped with a pressure regulator and are adjusted on site (e.g. forced draught burners). Category 2R
21、 or 3R burners are to be run through in each gas group accordingly, and shall be adjustable according to the SRG method, supplementing the relevant tables in Annex B with additional information. Marking an appliance, e.g. with “category II2E3B/P” in connection with the relevant pressure for a direct
22、 country of destination (e.g. marking appliances intended for Germany with “DE, G 20 20 mbar, G 30/G 31 50 mbar”, does not preclude additional marking with Category II2E+3+ for indirect countries of destination (e.g. France and Belgium), if suitability for this type of operation with a blocked press
23、ure regulator has been proven during type testing. This harmonized version of the standard now includes third family gases at a supply pressure of 30 mbar for appliances for use in boats and leisure accommodation vehicles. Category II2E3Pis listed as a national alternative for Germany in EN 297, EN
24、483 and EN 656. This category is not included in DIN EN 437, however, because the “P” in this category refers to pure propane, and the relevant delivery guarantees, e.g. as in LPG supply contracts, are to be met. When supplying liquefied petroleum gases as in DIN 51622 in bottles, there is no guaran
25、tee that only propane has been delivered. The DIN Standard corresponding to the International Standard referred to in this document is as follows: ISO 6976 DIN 51857 Amendments This standard differs from DIN EN 437:2003-09 as follows: a) This standard now also contains the national situations for Al
26、bania, Bulgaria, Croatia, Republic of Macedonia and Turkey. b) Designations and classifications in the tables in Annex B have been updated. c) Appliance categories and supply pressures in Annex D have been rendered more precise. Previous editions DIN EN 437: 1994-03, 1997-04, 1999-12, 2003-09 Nation
27、al Annex NA (informative) Bibliography DIN 51857, Gaseous fuels and other gases Calculation of calorific value, density, relative density and Wobbe index of pure gases and gas mixtures EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 437:2003+A1 March 2009 ICS 27.060.20; 91.140.40 Supersedes EN
28、437:2003English Version Test gases Test pressures Appliance categories Gaz dessais Pressions dessais Catgories dappareils Prfgase Prfdrcke Gertekategorien This European Standard was approved by CEN on 6 December 2002 and includes Amendment 1 approved by CEN on 10 January 2009. CEN members are bound
29、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
30、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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status
31、as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slo
32、vakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reserved worldwid
33、e for CEN national Members. Ref. No. EN 437:2003+A1:2009: EEN 437:2003+A1:2009 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Terms and definitions .44 Gases 74.1 Classification 74.2 Test gases 75 Test pressures .96 Classification of appliances 126.1 Appliance categories 126.1.1 Ge
34、neral . 126.1.2 Category I 126.1.3 Category II . 136.1.4 Category III . 146.2 Operations permitted for a change of gas or pressure, adjustment and regulating devices . 157 Choice of test gases and test pressures 158 Marking 16Annex A (normative) Conditions for preparation of the test gases . 17Annex
35、 B (informative) National situations . 18B.1 General . 18B.2 Categories listed in the body of the standard marketed in the different countries . 18B.3 Appliance supply pressures corresponding to the categories given !in B.1 and B.2“ . 21B.4 Special categories marketed nationally or locally 22B.5 Tes
36、t gases and test pressures corresponding to the special categories given in B.4 . 30B.6 Special conditions 34Annex C (informative) Guidelines for extension to other categories 39Annex D (informative) National situation of countries whose national bodies are CEN affiliate members 40D.1 !General . 40D
37、.2 Categories listed in the body of the standard and marketed in the different countries“ 40!Bibliography“ 42DIN EN 437:2009-09 EN 437:2003+A1:2009 (E) 3 Foreword This document (EN 437:2003+A1:2009) has been prepared by Technical Committee CEN/TC 238 “Test gases, test pressures and categories of app
38、liances”, 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 September 2009, and conflicting national standards shall be withdrawn at the latest by Septembe
39、r 2009. This document replaces !EN 437:2003“. This document includes Amendment 1, approved by CEN on 2009-01-10. The start and finish of text introduced or altered by amendment is indicated in the text by tags !“. This document has been prepared under a mandate given to CEN by the European Commissio
40、n and the European Free Trade Association, and supports the requirements of 2.2 of the “Gas Appliances“ Directive (90/396/EEC). Annex A is normative. Annexes B, C and D are informative. EN 437 is intended to provide all the CEN Technical Committees preparing standards on gas appliances with definiti
41、ons for test gases, test pressures and categories of appliances for use by these committees within the limits of the scope defined in clause 1. Similarly, it is emphasized that distributors of 2ndfamily gases using pressure couples should restrict themselves to their use in the normal manner but may
42、, in exceptional circumstances and for short periods, use gases of the lowest Wobbe index at the lowest pressure, under conditions in which the safety of the appliance has to be ensured. The standard seeks to clarify the present situation with respect to test gases, test pressures and appliance cate
43、gories. The concern for clarity has led to the elucidation of numerous categories and national situations or conditions. The complexity of the standard is likely to increase as new members join the Union. This revised standard incorporates the two previously published amendments and includes new app
44、liance categories, the reason for which does not lie essentially with new gas resources but with new technical developments for appliances. !This standard can be considered as an important stage in the harmonization of test gases, test pressures and appliance categories and the quality of informatio
45、n on gas usage in Europe. The standard also applies to Albania, Croatia, Republic of Macedonia and Turkey, countries whose national standardisation body is affiliate member of CEN (see Annex D). Annex B gives national situations relating to gases, gas pressures and appliance categories that apply na
46、tionally or locally. The information provided is included under the responsibility of the national standardisation bodies. The tables give the available information.“ According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to imple
47、ment this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland
48、and the United Kingdom. DIN EN 437:2009-09 EN 437:2003+A1:2009 (E) 4 1 Scope This standard 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
49、 for appliances that fall within the scope of the Council Directive on the approximation of the laws of Member States concerning gas appliances (90/396/EC). The standard makes recommendations for the use of the gases and pressures to be applied for the tests. The full procedure will be given in the corresponding appliance standards. NOTE The test gases and the test pressures specified in this standard are in principle intended to be used
