1、BRITISH STANDARD Test gases Test pressures Appliance categories ICS 27.060.20; 91.140.40 BS EN 437:2003+A1:2009BS EN 437:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 May 2003 BSI 2009 ISBN 978 0 580 67989 6 National foreword Amendm
2、ents corrigenda issued since publication This British Standard is the UK implementation of EN 437:2003+A1:2009. It supersedes BS EN 437:2003 which is withdrawn. The start and finish of text introduced or altered by amendment is indicated in the text by tags. Tags indicating changes to CEN text carry
3、 the number of the CEN amendment. For example, text altered by CEN amendment A1 is indicated by a b . The UK participation in its preparation was entrusted to Technical Committee GSE/26, Test gases. A list of organizations represented on this committee can be obtained on request to its secretary. Th
4、is publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Date Comments 31 May 2009 Implementation of CEN amendment A1:2009 +A1:2009 EUROP
5、EAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 437:2003+A1 March 2009 ICS 27.060.20; 91.140.40 Supersedes EN 437:2003 English Version Test gases - Test pressures - Appliance categories Gaz dessais - Pressions dessais - Catgories dappareils Prfgase - Prfdrcke - Gertekategorien This European Standard
6、 was approved by CEN on 6 December 2002 and includes Amendment 1 approved by CEN on 10 January 2009. 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
7、-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN 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 u
8、nder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greec
9、e, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Managemen
10、t Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 437:2003+A1:2009: EEN 437:2003+A1:2009 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4
11、Gases 7 4.1 Classification 7 4.2 Test gases 7 5 Test pressures .9 6 Classification of appliances 12 6.1 Appliance categories 12 6.1.1 General . 12 6.1.2 Category I 12 6.1.3 Category II . 13 6.1.4 Category III . 14 6.2 Operations permitted for a change of gas or pressure, adjustment and regulating de
12、vices . 15 7 Choice of test gases and test pressures 15 8 Marking 16 Annex A (normative) Conditions for preparation of the test gases . 17 Annex B (informative) National situations . 18 B.1 General . 18 B.2 Categories listed in the body of the standard marketed in the different countries . 18 B.3 Ap
13、pliance supply pressures corresponding to the categories given ! ! ! !in B.1 and B.2“ “ “ “ . 21 B.4 Special categories marketed nationally or locally 22 B.5 Test gases and test pressures corresponding to the special categories given in B.4 . 30 B.6 Special conditions 34 Annex C (informative) Guidel
14、ines for extension to other categories 39 Annex D (informative) National situation of countries whose national bodies are CEN affiliate members 40 D.1 ! ! ! !General . 40 D.2 Categories listed in the body of the standard and marketed in the different countries“ “ “ “ 40 ! ! ! !Bibliography“ “ “ “ 42
15、 BS EN 437:2003+A1:2009EN 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 appliances”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of
16、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 September 2009. This document replaces !EN 437:2003“. This document includes Amendment 1, approved by CEN on 2009
17、-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 Commission and the European Free Trade Association, and supports the requirements of 2.2 of the “Gas Appliances“ D
18、irective (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 definitions for test gases, test pressures and categories of appliances for use by these committees within the li
19、mits of the scope defined in clause 1. Similarly, it is emphasized that distributors of 2 ndfamily gases using pressure couples should restrict themselves to their use in the normal manner but may, in exceptional circumstances and for short periods, use gases of the lowest Wobbe index at the lowest
20、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 categories. The concern for clarity has led to the elucidation of numerous categories and national situation
21、s 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 appliance categories, the reason for which does not lie essentially with new gas resources but with new tec
22、hnical 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 information on gas usage in Europe. The standard also applies to Albania, Croatia, Republic of Macedonia and Turke
23、y, 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 nationally or locally. The information provided is included under the responsibility of the national stand
24、ardisation 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 implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finla
25、nd, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 437:2003+A1:2009EN 437:2003+A1:2009 (E) 4 1 Scope This standard specifies
26、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 that fall within the scope of the Council Directive on the approximation of the laws
27、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 stand
28、ard are in principle intended to be used with all the appliances in order to establish conformity with the corresponding standards. 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
29、 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 establ
30、ish compliance with their requirements. 2 Normative references !The following referenced documents are indispensable for the application of this European Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including a
31、ny amendments) applies.“ !EN ISO 3166-1:2006, Codes for the representation of names of countries and their subdivisions Part 1: Country codes (ISO 3166-1:2006)“ !EN ISO 6976:2005, Natural gas Calculation of calorific values, density, relative density and Wobbe index from composition (ISO 6976:1995 i
32、ncluding Corrigendum 1:1997, Corrigendum 2:1997 and Corrigendum 3:1999)“ 3 Terms and definitions For the purposes of this standard, the following terms and definitions apply: 3.1 gas appliance appliance burning !gaseous fuels“ !NOTE For the purposes of this standard the term “gaseous fuels“ means an
33、y fuel that is in the gaseous state at a temperature of 15 C, and under a pressure of 1 bar.“ 3.2 test gases gases intended for the verification of the operational characteristics of !gas appliances“. They consist of reference gases and limit gases 3.3 reference gases test gases with which appliance
34、s operate under nominal conditions when they are supplied at the corresponding normal pressure BS EN 437:2003+A1:2009EN 437:2003+A1:2009 (E) 5 3.4 limit gases test gases representative of the extreme variations in the characteristics of the gases for which appliances have been designed 3.5 test pres
35、sures gas pressures used to verify the operational characteristics of !gas appliances“. They consist of normal and limit pressures NOTE The gas pressures used are expressed in millibars (mbar) 1 mbar = 10 2Pa 3.6 normal pressure p n pressure under which the appliances operate in nominal conditions w
36、hen they are supplied with the corresponding reference gas 3.7 limit pressures maximum pressure: p max ; minimum pressure: p min pressures representative of the extreme variations in the appliance supply conditions 3.8 pressure couple combination of two distinct gas distribution pressures applied by
37、 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. 3.9 reference conditions these correspond to 15 C, 1 013,
38、25 mbar, unless otherwise specified 3.10 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 3.11 calorific value quantity of heat produced by the complete combustion, at a constant press
39、ure 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 back to the same conditions A distinction is made between: the gross calorific value H s : the water produced by c
40、ombustion is assumed to be condensed; the net calorific value H i : the water produced by combustion is assumed to be in the vapour state NOTE The calorific value is expressed: either in megajoules per cubic metre (MJ/m 3 ) of dry gas under the reference conditions; or in megajoules per kilogram (MJ
41、/kg) of dry gas. 3.12 Wobbe index gross Wobbe index W s ; net Wobbe index W iBS EN 437:2003+A1:2009EN 437:2003+A1:2009 (E) 6 ratio of the calorific value of a gas per unit volume and the square root of its relative density under the same reference conditions. The Wobbe index is said to be gross or n
42、et according to whether the calorific value used is the gross or net calorific value NOTE The Wobbe indices are expressed - either in megajoules per cubic metre (MJ/m 3 ) of dry gas under the reference conditions or in megajoules per kilogram (MJ/kg) of dry gas. 3.13 heat input Q quantity of energy
43、used in unit time corresponding to the volumetric or mass flow rates, the calorific value used being either the net or gross calorific value NOTE The heat input is expressed in kilowatts (kW) 3.14 nominal heat input Q n value of the heat input declared by the manufacturer 3.15 mass flow rate M mass
44、of gas consumed by the appliance in unit time during continuous operation NOTE The mass flow rate is expressed in kilograms per hour (kg/h) or grams per hour (g/h) 3.16 volume flow rate V volume of gas consumed by the appliance in unit time during continuous operation NOTE The volume flow rate is ex
45、pressed in cubic metres per hour (m 3 /h), litres per minute (l/min), cubic decimetres per hour (dm 3 /h) or cubic decimetres per second (dm 3 /s). 3.17 gas family group of !gaseous fuels“ with similar burning behaviour linked together by a range of Wobbe indices (see Table 1) 3.18 gas group specifi
46、ed range of Wobbe index within that of the family concerned (see Table 1); this range is determined on the general principle that appliances utilising this gas group would operate safely when burning all gases within this range without adjustments. NOTE Adjustment of the appliance may be permitted i
47、n accordance with the special national or local conditions that apply in some countries (see B.4). For gases corresponding to national or local conditions, see Tables B.5 and D.5 3.19 appliance category means of identifying the gas families and/or gas groups that a gas appliance is designed to utili
48、ze safely and to the desired performance level (see individual appliance standards). NOTE General appliance categories are described in 6.1. Special appliance categories marketed nationally or locally are described in B.4 and annex D. BS EN 437:2003+A1:2009EN 437:2003+A1:2009 (E) 7 4 Gases 4.1 Class
49、ification Gases are classified into three families, each family may be divided into groups, (themselves being divided into ranges, see annex B), as a function of the Wobbe index, according to the values given in Table 1. Table 1 Summary of gas families and groups as a function of the Wobbe indices Gas famil
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