1、BRITISH STANDARDBS EN 676:2003 +A2:2008Automatic forced draught burners for gaseous fuelsICS 27.060.20; 97.100.20g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g
2、55g3g47g36g58Incorporating Corrigendum December 2008BS EN 676:2003+A2:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 3 October 2003 BSI 2009ISBN 978 0 580 64166 4National forewordThis British Standard is the UK implementation of EN 676:2
3、003+A2:2008. It supersedes BS EN 676:2003 which is withdrawn.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 the number of the CEN amendment. For example, text altered by CEN amendment A1 is indicated by !“.
4、The UK participation in its preparation was entrusted to Technical Committee GSE/27, Automatic gas burners.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users
5、are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationDate Comments31 March 2009 Implementation of CEN amendment A2:2008 and corrigendum December 2008. Change of listing prEN 676 in t
6、able ZB.1, to EN 676. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 676:2003+A2 June 2008 ICS 27.060.20 Supersedes EN 676:2003 English Version Automatic forced draught burners for gaseous fuels Brleurs automatiques air souffl pour combustibles gazeux Automatische Brenner mit Geblse fr gasfrmi
7、ge Brennstoffe This European Standard was approved by CEN on 3 April 2003 and includes Amendment 1 approved by CEN on 1 April 2008 and Amendment 2 approved by CEN on 1 April 2008. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
8、 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 Management Centre or to any CEN member. This European Standard exists in three official versions (
9、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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulg
10、aria, 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 and United Kingdom. EUROPEAN COMMITTEE FOR STANDARD
11、IZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 676:2003+A2:2008: EEN 676:2003+A2:2008 (E) 2 Contents
12、 Foreword4 1 Scope 6 2 Normative references 6 3 Terms and definitions .9 3.1 General terms and definitions9 3.2 Specific terms and definitions10 4 !Constructional and operational requirements safety requirements and/or protective measures“.16 4.1 Conversion to different gases 16 4.2 Construction.16
13、4.3 Equipment 18 4.4 Functional and operational requirements.24 4.5 !Machine safety requirements and/or protective measures .31 5 Test methods32 5.1 General32 5.2 Functional tests .36 5.3 Operation 37 5.4 Tests to be carried out on the working and test diagrams .38 5.5 Combustion42 5.6 Start-up .43
14、5.7 Obtaining the heat input .43 5.8 Electrical safety44 5.9 !Verification of safety and /or protective measures.44 6 Marking, labelling and packaging 44 6.1 General44 6.2 Data plate45 6.3 Other marking 45 6.4 Instructions for installation, adjustment, maintenance and operation46 6.5 Marking on the
15、packaging 47 Annex A (informative) Determination of the combustion characteristics - carbon monoxide and nitrogen oxides 60 Annex B (informative) Examples of control box sequencing 62 Annex C (informative) Test gases63 C.1 General63 C.2 Conditions for preparation of the test gases63 C.3 Practical ap
16、plication of the test gases 64 Annex D (informative) Gas connections conditions in common use in the various countries .67 Annex E (informative) Tests .68 E.1 Supplementary testing 68 E.2 Drawing review.68 E.3 Individual test and inspection 68 E.4 Test report 69 Annex F (informative) Use of alternat
17、ive gas lines and test documentation 70 F.1 Use of alternative gas lines 70 F.2 Test documentation.70 Annex G (informative) Correction of the influence of combustion air temperature and humidity on NOx- emissions .71 Annex H (informative) Check of the air proving device.72 BS EN 676:2003+A2:2008EN 6
18、76:2003+A2:2008 (E) 3 Annex I (informative) !Additional recommendations for specific applications“.73 I.1 !General 73 I.2 Pre-heating of the combustion air .73 I.3 Continuous working of the air ventilator 73 I.4 Variable excess of combustion air 73 I.5 Burner with start gas flame 73 I.6 Air filterin
19、g74 Annex J (normative) !Machine related hazards safety requirements and/or protective measures .75 J.1 General75 J.2 List of significant hazards 75 J.3 Safety requirements and /or protective measures.75 J.4 Verification of machine safety requirements and/or protective measures .78 J.5 Information f
20、or use 78 Annex K (normative) #Additional requirements for burners with pressurised parts and burners firing pressurised bodies as defined in Pressure Equipment Directive (PED) 97/23/EC .79 K.1 General79 K.2 Design.79 K.3 Materials .79 K.4 Pressurised parts 79 K.5 Gas line components 80 K.6 Gas pres
21、sure governor .81 K.7 High gas pressure over load protection device .81 K.8 Automatic safety shut-off valve .81 K.9 Air proving device .81 K.10 Automatic burner control system 81 K.11 Means for draining and venting .81 K.12 General functions requirements 82 K.13 External safety limiter .83 K.14 Desi
22、gn according to EN 50156-183 K.15 Consideration: safety life cycle84 K.16 Tests of pressurised parts85 K.17 Other marking 86 K.18 Instructions for installation, adjustment, maintenance and operation86 Annex ZA (informative) A-deviations 87 Annex ZB (informative) Clauses of this European Standard add
23、ressing essential requirements or other provisions of EU Directives88 Annex ZC (informative) #Relationship between this European Standard and the essential safety requirements of the Pressure Equipment (PED) Directive 97/23/EC$ 91 Annex ZD (informative) !Relationship between this European Standard a
24、nd the Essential Requirements of EU Directive 98/37/EC Machinery Directive“ .98 Annex ZE (informative) !Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC Machinery Directive“ .99 Bibliography100 BS EN 676:2003+A2:2008EN 676:2003+A2:2008 (E) 4 Forew
25、ord This document (EN 676:2003+A2:2008) has been prepared by Technical Committee CEN/TC 131 “Gas burners using fans”, the secretariat of which is held by DIN. This document shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest b
26、y December 2008 and conflicting national standards shall be withdrawn at the latest by June 2010. This document includes Amendment 1, approved by CEN on 2008-04-01 and Amendment 2, approved by CEN on 2008-04-01. This document supersedes #EN 676:2003$. The start and finish of text introduced or alter
27、ed by amendment is indicated in the text by tags ! “ and # $. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informativ
28、e #Annexes ZB, ZC, ZD and ZE$, which are integral parts of this document. !deleted text“ According to edition 1996 the following fundamental changes are given: revisions for special applications; implementation of NOx-classes and forming of arithmetic average values for determining the NOx-values; i
29、mplementation of appliance categories for forced draught burners. #Following a request from CEN/TC 131, CEN has agreed to defer the date of withdrawal of EN 676:2003 for a transition period of 2 years.$ #Annexes A, B, C, D, E, F, G, H, I, ZA, ZB, ZC, ZD and ZE are informative.$ !Annexes J and K are
30、normative.“ This document includes a Bibliography. 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, Finland, France,
31、Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. BS EN 676:2003+A2:2008EN 676:2003+A2:2008 (E) 5 Introduction This European Standard is primarily
32、 intended for automatic forced draught gas burners having a combustion air fan, operated with gaseous fuels, and intended to be marketed as a complete assembly. EN 437 sets out a system of classification of appliances into categories defined according to the gases and pressures for which they are de
33、signed. Such a system of classification, when applied to forced draught burners, can lead to difficulties in defining the precise category to which a particular burner should be allocated. For example many burners are designed to operate on a wide range of fuel gases with little or no modification o
34、ther than adjustment of air supply. The technical committee responsible for the standard decided that the following appliance categories for forced draught burners should apply: single categories: I2Rfor natural gas and I3Rfor liquefied petroleum gas; dual category: II2R /3Rfor natural and liquefied
35、 petroleum gas. All the burners of this standard marked with these categories are commissioned on site and the measured values are recorded in a commissioning report. However it should be noted that the Gas Appliance Directive requires the specification of the type of gas and the supply pressure use
36、d as well as the burner category. Forced draught gas burners according to this standard are often used in industrial applications. The safety principles are the same as for forced draught gas burners used for household/commercial applications. Industrial forced draught gas burners however should ope
37、rate safely in their industrial environment and the risks involved can differ from those for household applications. These industrial forced draught gas burners can be characterized by the ability to withstand industrial environmental influences, like moisture, high temperature, electrical and magne
38、tic phenomena, vibrations, etc. Principal requirements for installation and construction of gas burners and industrial thermal processing are covered by EN 746-family. Special requirements for forced draught burners for industrial premises will be given as a note with the addition “Industrial applic
39、ation“. Further information and application limitation for EN 676 forced draught burners which are used for industrial application are given in informative annex I. !This document is a type C standard as stated in EN ISO 12100-1 and EN ISO 12100-2. The machinery concerned and the extent to which haz
40、ards, hazardous situations and hazardous events are covered are indicated in the scope of this document. When provisions of this type C standard are different from those which are stated in type A or B standards, the provisions of this type C standard take precedence over the provisions of the other
41、 standard, for machines that have been designed and built according to the provisions of this type C standard.“ BS EN 676:2003+A2:2008EN 676:2003+A2:2008 (E) 6 1 Scope !This European Standard specifies the terminology, the general requirements for the construction and operation of automatic forced d
42、raught gas burners and also the provision of control and safety devices, and the test procedure for these burners.“ This standard is applicable to !automatic gas burners with a combustion air fan (hereinafter called “burners“) as described in 3.1.2 and gas line components, intended for use in applia
43、nces of different types, and that are operated with gaseous fuels;“ total pre-mixed burners and nozzle mixed burners. The standard is applicable to !single burners with a single combustion chamber;“ single-fuel and dual-fuel burners when operating only on gas; !gas function of dual-fuel burners desi
44、gned to operate simultaneously on gaseous and liquid fuels.“ !This European Standard deals with all significant machine hazards, hazardous situations and events relevant to burners, when they are used as intended and under conditions of misuse which are reasonably foreseeable by the manufacturer, se
45、e Annex J. This European Standard specifies the requirements to be met by the manufacturer to ensure the safety during commissioning, start-up, operation, shut-down and maintenance. This European Standard does not deal with hazards due to specific applications. This European Standard is not applicab
46、le to automatic forced draught gas burners which are manufactured before the date of its publication as EN.“ #This European Standard does not apply to burners specifically designed for use in industrial processes carried out on industrial premises. This European Standard deals also with the addition
47、al requirements for the burners in the scope with pressurised parts and /or firing pressurised bodies, see Annex K.$ 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate p
48、laces in the text, and the publications are listed hereafter. For 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 r
49、eferred to applies (including amendments). #EN 88-1, Pressure regulators and associated safety devices for gas appliances Part 1: Pressure regulators for inlet pressures up to and including 500 mbar EN 88-2 Pressure regulators and associated safety devices for gas appliances Part 2: Pressure regulators for inlet pressures above 500 mbar up to and including 5 bar$ EN 161, Automatic shut-off valves for gas burners and gas appliances EN 267, Forced draught oil burners Definitions, requirements, testing, marking BS EN 676:2003+A2:2008EN 676:2003+A2:2
