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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 498 : 1998 The Euro
2、pean Standard EN 498 : 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 Barbecues for outdoor use This British Standard, having been prepared under the directi
3、on 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 28951 6 BS EN 498 : 1998 Amendments issued since publication Amd. No.DateText affected National foreword This British Standard is the English lan
4、guage version of EN 498 : 1997. It supersedes BS 5258 : Part 14 : 1984, which is withdrawn. 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
5、 European committee any enquiries on the 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 secreta
6、ry. Cross-references The British Standards 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 Elect
7、ronic Catalogue. Compliance with a British 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 Standardiz
8、ation Comite Europe en de Normalisation 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 498 : 1997 E EUROPEAN STANDARDEN 498 NORME EUR
9、OPE ENNE EUROPA ISCHE NORM September 1997 ICS 97.040.20 Descriptors: Cooking appliances, gas appliances, liquefied petroleum gases, barbecue, exteriors, definitions, classifications, equipment specifications, performance evaluation, safety, tests, verification, marking, technical notices English ver
10、sion Specification for dedicated liquefied petroleum gas appliances Barbecues for outdoor use Spe cifications pour les appareils fonctionnant exclusivement aux gaz de pe trole lique fie s Barbecues utilise s en plein air Festlegungen fu r Flu ssiggasgera te Grillgera te zur Verwendung im Freien This
11、 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 lists and bibliographical referenc
12、es 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 responsibility of a CEN member into
13、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, Netherlands, Norway, Portugal, Spa
14、in, Sweden, Switzerland and United Kingdom. Page 2 EN 498 : 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 Standard shall be given the status of a
15、 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 the European Commission and the E
16、uropean Free Trade Association, and supports the essential requirements of EU Directive(s). For relationship with EU Directives, see informative Annex ZA, which is an integral part of this standard. This standard applies only to type testing. Items relating to quality assurance systems, production t
17、esting and particularly certificates of conformity of auxiliary equipment are not covered by this standard Particular attention should be paid to the quality of non-metallic materials used in the construction of these appliances. A European Standard specifying Requirements for rubber materials for s
18、eals and diaphragms for gas appliances and equipment has been prepared by CEN TC 108 (EN 549). A European Standard for Flexible hose, tubing and assembles for use with butane or propane in the vapour phase is being prepared by CEN TC 218. These standards will be applicable to these types of applianc
19、es. 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, Italy, Luxembourg, Netherlands, Norway,
20、 Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword2 1Scope3 2Normative references3 3Definitions3 4Classification5 5Constructional characteristics6 5.1Conversion to different gases6 5.2Materials6 5.3Ease of cleaning6 5.4Strength6 5.5Assembly6 Page 5.6Stability7 5.7So
21、undness of the gas circuit assembly7 5.8Connections7 5.9Locking of wheels and castors7 5.10 Taps7 5.11 Control handles8 5.12 Injectors8 5.13 Ignition devices8 5.14 Flame supervision devices9 5.15 Burners9 5.16 Grid9 5.17 Turnspits9 5.18 Appliance incorporating a gas container9 5.19 Durability of mar
22、kings9 5.20 Auxiliary energy9 6Performance characteristics10 6.1Soundness10 6.2Verification of the nominal heat input10 6.3Flame supervision devices10 6.4Safety of operation10 6.5Temperatures10 6.6Overheating of the gas container11 6.7Combustion11 6.8Sooting11 7Test methods11 7.1General11 7.2Verific
23、ation of the constructional characteristics12 7.3Verification of the performance characteristics13 8Marking15 8.1Appliance marking15 8.2Packaging marking15 8.3Instructions for assembly, use and maintenance16 Annexes A(normative) National situations20 A.1 Categories marketed in the various countries2
24、0 A.2 Nominal appliance operating pressures20 A.3 Types of connection used in various countries20 B(normative) Method of calculation of the nominal heat input23 C(normative) Composition of test gases24 D(informative) Connection of appliances25 ZA(informative) Clauses of this European Standard addres
25、sing essential requirements or other provisions of EU Directives26 Page 3 EN 498 : 1997 BSI 1998 1 Scope This standard specifies the constructional and performance characteristics, safety specifications, relevant test methods and marking of barbecues burning liquefied petroleum gas, referred to in t
26、he body of the text as appliances. This standard covers barbecues as defined in 3.6, used outdoors and operating with the gases indicated in 4.1 according to the categories indicated in 4.2. They are fitted with at least one cooking device. This standard applies to these appliances and their functio
27、nal sections whether or not the latter are independent or incorporated into an assembly. This standard also applies to appliances designed to be built in. This standard only applies to type testing. Appliances supplied with third family gas at pressures greater than those defined in 4.2 are outside
28、the field of application of this standard. During the consideration of this text, it was apparent that the concept of thermal efficiency with regard to appliances such as barbecues was not appropriate. This is because: during cooking, there is an additional transfer of heat due to the meat juices fa
29、lling on to the refractories; there is no relation between the item to be cooked and the useful area; the barbecue is an outdoor appliance in which the action of the wind is important in relation to efficiency. In consequence there is no specific requirement covering thermal efficiency for this type
30、 of appliance. 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 dated references, subsequent amendmen
31、ts to or revisions of any of their 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 : 1991Flame supervision safety devices for gas burning appliances Thermoelec
32、tric flame supervision devices EN 126 : 1993Multifunctional controls for gas-burning appliances. EN 437 : 1993Test gases, test pressures, appliance categories EN 60335-1Safety of household and similar electrical appliances Part 1: General requirements (IEC 335-1 : 1983, modified) ISO 7-1 : 1994Pipe
33、threads where pressure-tight joints are made on the threads Part 1: Designation, dimensions and tolerances ISO 228-1 : 1994 Pipe threads where pressure-tight joints are not made on the threads Part 1: Designation, dimensions and tolerances 3 Definitions For the purposes of this standard, the followi
34、ng terminology applies. 3.1 cooking devices Component parts of the appliance designed to hold or receive the food to be cooked (grids, turnspits, plates, etc.). 3.2 detachable That which can be dismantled without using a tool. 3.3 appliance incorporating a gas container An appliance whose body or su
35、pport includes a compartment for a liquefied petroleum gas container, or a fixing or support device for this container. 3.4 built-in appliance An appliance designed to be built into a brick or similar structure. 3.5 auxiliary equipment All the components and devices acting directly or indirectly on
36、the gas rate. 3.6 barbecue An appliance principally designed to roast and/or grill foodstuffs. Cooking is achieved by the action of radiant heat and possibly by convection. 3.7 mobile barbecue A barbecue fitted with at least one wheel enabling it to be moved easily on the ground. 3.8 locking of an a
37、djuster Locking of an adjuster by the manufacturer or by an installer, in its adjustment position by any means (a screw, etc.). 3.9 turnspit A cooking device enabling the rotation of the food to be roasted. Its rotation can be effected manually or using a mechanical or electrical motor. Page 4 EN 49
38、8 : 1997 BSI 1998 3.10 burner A component that allows the gas to burn. It may be one of two types: non-aerated 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
39、 and mixed before the burner outlet. The remainder of the air, termed secondary air, is drawn in after the burner outlet. 3.11 ignition burners Small burners whose flame is designed to light another burner. They are called pilots in this standard. 3.12 sooting Phenomenon appearing during incomplete
40、combustion and characterized by a deposit of carbon on surfaces in contact with the flame or the products of combustion. 3.13 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 pre
41、ssure applies only with gases of low Wobbe index; the lowest pressure applies only with gases of high Wobbe index. EN 437 3.14 heat input The product of the volume or mass rate and the calorific value of the gas, brought to the same reference conditions. It is expressed in kilowatts (kW). Symbol: Q.
42、 For the purposes of this standard, only heat inputs calculated from the gross calorific value are considered (see 3.32). 3.15 nominal heat input of a burner The value of the heat input of this burner, as declared by the manufacturer. Symbol: Qn. 3.16 mass rate The mass of gas passed in unit time. I
43、t is expressed in kilograms per hour (kg/h) or in grams per hour (g/h). Symbol: M. 3.17 volume rate The volume of gas passed in unit time. It is expressed in cubic metres per hour (m3/h) or in cubic decimetres per hour (dm3/h), the gas being dry and under the reference test conditions. Symbol: V. 3.
44、18 flame lift Phenomenon characterized by the partial or total movement of the base of the flame away from the burner port. 3.19 removable That which can only be removed with a tool. 3.20 relative density The ratio of the mass of a volume of dry gas to an equal volume of dry air under the same tempe
45、rature and pressure conditions. 3.21 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.). 3.22 flame supervision device A device which, due to the pres
46、ence 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. 3.23 grid A cooking device designed to hold the food to be cooked. Its useful component(s) can be rigid
47、 or flexible. A grid with flexible useful components (called a wallet grid) is made up of two jointed components enabling tight gripping of the food to be cooked. Each component consists of a rigid frame on which metallic wires are fixed and form a flexible mesh inside the frame distorting around th
48、e food. 3.24 glass panel Transparent surface allowing the inside of the appliance to be seen. 3.25 Wobbe index The ratio of the calorific 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
49、gross calorific value (see 3.32). It is expressed in megajoules per cubic metre (MJ/m3). Symbol: gross Wobbe index Ws. 3.26 injector A component part that admits the gas into an aerated burner. There are two types of injector: calibrated injectors where the section of the outlet orifice is fixed; adjustable injectors where the section of the outlet orifice is variable. 3.27 control handle A component designed to be operated manually so as to control the movement of a control of the appliance, such as a tap. 3.28 m