1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 497 : 1998 The Euro
2、pean Standard EN 497 : 1997 has the status of a British Standard ICS 97.040.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Specification for Dedicated liquefied petroleum gas appliances Multi-purpose boiling burners for outdoor useThis British Standard, having been prepare
3、d under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 February 1998 BSI 1998 ISBN 0 580 28962 1 BS EN 497 : 1998 Amendments issued since publication Amd. No. Date Text affected National foreword This British Standa
4、rd is the English language version of EN 497 : 1997. The UK participation in its preparation was entrusted to Technical Committee GSE/24, Dedicated LPG appliances, which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on th
5、e interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standa
6、rds which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. Compliance with a Brit
7、ish Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 28, an inside back cover and a back cover.CEN European Committee for Standardization Comite Europe en de Normalisation
8、Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1997 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 497 : 1997 E EUROPEAN STANDARD EN 497 NORME EUROPE ENNE EUROPA ISCHE NORM September 19
9、97 ICS 97.040.20 Descriptors: Gas appliances, liquefied petroleum gases, burners, exterior, definitions, classifications, equipment specifications, performance evaluation, safety, tests, verification, marking, technical notices English version Specification for dedicated liquefied petroleum gas appl
10、iances Multi purpose boiling burners for outdoor use Spe cifications pour les appareils fonctionnant exclusivement aux gaz de pe trole lique fie s Bru leurs a usages multiples, avec supports inte gre s, utilise s en plein air Festlegungen fu r Flu ssiggasgera te Flu ssiggasbetriebene Mehrzweckkochge
11、ra te zur Verwendung im Freien This European Standard was approved by CEN on 21 August 1997. 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
12、 lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat 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 r
13、esponsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,
14、 Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 497 : 1997 BSI 1998 Foreword This European Standard has been prepared by Technical Committee CEN/TC 181, Dedicated liquefied petroleum gas appliances, the Secretariat of which is held by NSAI. This European Stand
15、ard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 1998, and conflicting national standards shall be withdrawn at the latest by March 1998. This European Standard has been prepared under a mandate given to CEN by
16、 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 standard. This standard applies only to type testing. Items relating to quality
17、 assurance systems, production testing and particularly certificates of conformity of auxiliary equipment are not covered by this standard. Particular attention should be paid to the suitability of non-metallic materials used in the construction of these appliances. A European Standard specifying Re
18、quirements for rubber materials for seals and diaphragms for gas appliances and equipment has been prepared by CEN/TC 108 (EN 549). A European Standard for Flexible hose, tubing and assemblies for use with propane and butane in the vapour phase is being prepared by CEN/TC 218. These standards will b
19、e applicable to these types of appliances. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland,
20、Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword 2 1 Scope 4 2 Normative references 4 3 Definitions 4 4 Classification 6 5 Constructional characteristics 7 5.1 Conversion to different gases 7 5.2 Materials 7 5.3 Ease of clean
21、ing 7 5.4 Strength 7 5.5 Assembly 7 5.6 Stability 7 5.7 Soundness of the gas circuit assembly 7 5.8 Connections 8 5.9 Locking of wheels and castors 8 5.10 Taps 8 5.11 Control handles 8 5.12 Injectors 9 5.13 Ignition devices 9 5.14 Flame supervision devices 9 5.15 Burners 9 5.16 Appliance incorporati
22、ng a gas container 10 5.17 Durability of markings 10 6 Performance characteristics 10 6.1 Soundness 10 6.2 Verification of the nominal heat input 10 6.3 Flame supervision devices 10 6.4 Safety of operation 10 6.5 Temperatures 10 6.6 Overheating of the gas container 11 6.7 Combustion 11 6.8 Sooting 1
23、1 6.9 Rational use of energy 11 7 Test methods 11 7.1 General 11 7.2 Verification of the constructional characteristics 12 7.3 Verification of the performance characteristics 13Page 3 EN 497 : 1997 BSI 1998 8 Marking 16 8.1 Appliance marking 16 8.2 Packaging marking 16 8.3 Instructions for assembly,
24、 use and maintenance 16 Annexes A (normative) National situations 20 A.1 Categories sold in various countries 20 A.2 Nominal appliance supply pressures 21 A.3 Types of connection used in various countries 22 B (normative) Method of calculation of the nominal heat input 23 C (normative) Composition o
25、f test gases 24 D (informative) Connection of appliances 25 ZA (informative) Clauses of this European Standard addressing essential requirements or other provisions of EU Directives 27 Figures 1 Diagrams showing multi-purpose boiling burners 17 2 Apparatus for testing soundness 18 3 Sampling device
26、for checking combustion 19Page 4 EN 497 : 1997 BSI 1998 1 Scope This standard specifies the constructional and performance characteristics, safety specifications and rational use of energy, relevant test methods and marking of boiling burners burning liquefied petroleum gas and designed to heat up v
27、essels containing liquids or food, or a heating plate. They are referred to in the body of the text as appliances. This standard covers appliances, generally floor standing, fitted with one or several burners with a total heat input not exceeding 14 kW, designed to be used outdoors and operating wit
28、h the gases indicated in 4.1 according to the categories indicated in 4.2. Appliances supplied with third family gas at pressures greater than those defined in 4.2 are outside the field of application of this standard. Appliances covered by this standard are not connected to a flue for the products
29、of combustion and are not connected to the mains electrical supply. Appliances with a nominal heat input below 1,16 kW and appliances which are not designed to receive the test vessel described in 7.1.4 in any of their configurations are not subject to any requirement concerning the rational use of
30、energy. This standard applies only to type testing. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For
31、dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 125 : 1991 Flame supervision devices for ga
32、s burning appliances Thermo-electric flame supervision devices EN 437 : 1993 Test gases, test pressures, appliance categories HD 1003 : 1990 Heating in contact with the front of the domestic cooking appliances burning gas 3 Definitions For the purposes of this standard, the following definitions app
33、ly. 3.1 detachable That which can be dismantled without using a tool. 3.2 appliances incorporating a gas container An appliance whose body or support includes a compartment for a liquefied petroleum gas container, or a fixing or support device for this container. 3.3 auxiliary equipment All the comp
34、onents and devices acting directly or indirectly on the gas rate. 3.4 locking of an adjuster Locking of an adjuster by the manufacturer or by an installer, in its adjustment position by any means (a screw, etc.). 3.5 burner A component that allows the gas to burn. It may be one of two types: non-aer
35、ated burner, in which the air for combustion is entrained entirely at the burner outlet; aerated burner, in which part of the air for combustion, termed primary air, is entrained by the gas flow and mixed before the burner outlet. The remainder of the air, termed secondary air, is drawn in after the
36、 burner outlet. 3.6 multi-purpose boiling burner One or several non-domestic burners, with their adjusters, which are part of a structure ensuring both the support of burners and that of vessels and generally used as floor standing appliances. They incorporate one device (or devices) which ensures o
37、ne set position of the burner (or burners) in relation to the plane on which the appliance rests and to vessels or heating plates. Figure 1 gives diagrams of this type of appliance, for information. 3.7 ignition burners Small burners whose flame is designed to light another burner. They are called p
38、ilots in this standard. 3.8 covered burners Hotplate burner where the pans or food being heated are screened from direct flame contact by the interposition of a surface on which they rest. A covered burner may be: permanent, that is designed to be used only with the plate in position; with two funct
39、ions: that is designed to be capable of being used as an open burner after removal of a detachable plate. 3.9 open burners Hotplate burner where the pans being heated are in direct contact with the flames. 3.10 sooting Phenomenon appearing during incomplete combustion and characterized by a deposit
40、of carbon on surfaces in contact with the flame or the products of combustion.Page 5 EN 497 : 1997 BSI 1998 3.11 pressure couple Set of two separate supply gas pressures applied because of the large difference between the Wobbe indexes within a gas family or a gas group: the highest pressure applies
41、 only with gases of low Wobbe index; the lowest pressure applies only with gases of high Wobbe index. EN 437 3.12 shut down lid A lid intended to be shut down over the hotplate. 3.13 heat input The product of the volume or mass rate and the calorific value of the gas, brought to the same reference c
42、onditions. It is expressed in kilowatts (kW). Symbol: Q. For the purposes of this standard only heat inputs calculated from the gross calorific value are considered (see 3.28). 3.14 nominal heat input of a burner The value of the heat input of this burner, as declared by the manufacturer. Symbol: Q
43、n . 3.15 mass rate The mass of gas passed in unit time. It is expressed in kilograms per hour (kg/h) or in grams per hour (g/h). Symbol: M. 3.16 volume rate The volume of gas passed in unit time. It is expressed in cubic metres per hour (m 3 /h) or in cubic decimetres per hour (dm 3 /h), the gas bei
44、ng dry and under the reference test conditions. Symbol: V. 3.17 flame lift Phenomenon characterized by the partial or total movement of the base of the flame away from the burner port. 3.18 removable That which can only be removed with a tool. 3.19 relative density The ratio of the mass of a volume
45、of dry gas to an equal volume of dry air under the same temperature and pressure conditions. 3.20 ignition device A device to ignite one or more burners directly or indirectly, for instance through a flash tube. It may be: either electric (resistance, spark, etc.); or thermal (flame, pilot, etc.). 3
46、.21 flame supervision device A device which, due to the presence of a flame on the sensing element, keeps open the gas flow to the burner and pilot and which cuts off the gas supply to the burner and pilot in the case of extinction of the supervised flame. 3.22 Wobbe index The ratio of the calorific
47、 value of a gas, by unit of volume, and the square root of the density of the same gas. The Wobbe index is called gross when the calorific value considered is the gross calorific value (see 3.28). It is expressed in megajoules per cubic metre (MJ/m 3 ). Symbol: gross Wobbe index W s . 3.23 injector
48、A component part that admits the gas into an aerated burner. There are two types of injectors: calibrated injectors, where the section of the outlet orifice is fixed; adjustable injectors, where the section of the outlet orifice is variable. 3.24 control handle A component designed to be operated ma
49、nually so as to control the movement of a control of the appliance, such as a tap, etc. 3.25 means of sealing Any static or dynamic device designed to ensure soundness, for example: flat-faced joints, O-ring joints, conical joints, diaphragms, grease, pastes, putties . 3.26 primary air adjuster A device allowing the aeration rate of a burner to be set at a predetermined value according to the supply conditions. The action of operating this device is termed primary air adjustment. 3.27 gas rate a
