1、February 2010 Translation by DIN-Sprachendienst.English price group 17No part of this translation 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).I
2、CS 25.180.01!$BU“1583150www.din.deDDIN EN 746-3Industrial thermoprocessing equipment Part 3: Safety requirements for the generation and use of atmospheregases (includes Amendment A1:2009)English translation of DIN EN 746-3:2010-02Industrielle Thermoprozessanlagen Teil 3: Sicherheitsanforderungen fr
3、die Erzeugung und Anwendung von Schutz- undReaktionsgasen (enthlt nderung A1:2009)Englische bersetzung von DIN EN 746-3:2010-02quipements thermiques industriels Partie 3: Prescriptions de scurit pour la gnration et lutilisation des gaz datmosphre(Amendement A1:2009 inclus)Traduction anglaise de DIN
4、EN 746-3:2010-02SupersedesDIN EN 746-3:1997-05www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.4302.10 DIN EN 746-3:2010-02 A comma is used as the decimal marker. Start of validity This standard is valid from 1 February 2010. Nation
5、al foreword This standard includes safety requirements. This standard has been prepared by Technical Committee CEN/TC 186 “Industrial thermoprocessing Safety” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Maschinenbau (Mechanical Enginee
6、ring Standards Committee), Working Committee NA 060-03-03 AA Gaserzeuger of Section Thermoprozesstechnik. Representatives of manufacturers and users of thermoprocessing equipment, and of the employers liability insurance associations contributed to this standard. This standard contains specification
7、s meeting the essential requirements set out in Annex I of the “Machinery Directive”, Directive 98/37/EC, (valid until 28 December 2009) and the “revised Machinery Directive”, Directive 2006/42/EC, which takes effect on 29 December 2009, and which apply to machines that are either first placed on th
8、e market or commissioned within the EEA. This standard serves to facilitate proof of compliance with the essential requirements of the directives. Once this standard is cited in the Official Journal of the European Union, it is deemed a “harmonized” standard and thus, a manufacturer applying this st
9、andard may assume compliance with the requirements of the Machinery Directive (“presumption of conformity”). Amendments This standard differs from DIN EN 746-3:1997-05 as follows: a) Normative references have been updated. b) Annex ZA (informative) “Relationship between this European Standard and th
10、e Essential Requirements of EU Directive 98/37/EC” has been updated. c) Annex ZB (informative) “Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC” has been included. Previous editions DIN EN 746-3: 1997-05 2 EUROPEAN STANDARD NORME EUROPENNE EUROPI
11、SCHE NORM EN 746-3:1997+A1 June 2009 ICS 25.180.01 Supersedes EN 746-3:1997English Version Industrial thermoprocessing equipment Part 3: Safety requirements for the generation and use of atmosphere gases Equipements thermiques industriels Partie 3: Prescriptions de scurit pour la gnration et lutilis
12、ation des gaz datmosphre Industrielle Thermoprozessanlagen Teil 3: Sicherheitsanforderungen fr die Erzeugung und Anwendung von Schutz- und Reaktionsgasen This European Standard was approved by CEN on 19 March 1997 and includes Amendment 1 approved by CEN on 21 May 2009. CEN members are bound to comp
13、ly 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 Managem
14、ent 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 as the
15、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, Slovakia,
16、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 worldwide for C
17、EN national Members. Ref. No. EN 746-3:1997+A1:2009: EEN 746-3:1997+A1:2009 (E) 2 Contents Page Foreword 3Introduction .51 Scope 52 Normative references 63 Definitions 74 List of hazards . 105 Safety requirements for the use of atmosphere gases. 165.1 Purging 165.2 Safety control equipment for atmos
18、phere gases 175.3 Thermo-processing equipment requirements . 186 Safety requirements for atmosphere gas generators . 226.1 Reaction gas supplies 226.2 Fuel gas supplies 236.3 Air supplies . 236.4 Mixture supplies 246.5 Electrical supplies 246.6 Cooling water supplies and discharge . 246.7 Atmosphere
19、 gas supplies and distribution 256.8 System requirements . 257 Verification of the safety requirements and/or measures 278 Information for use . 278.1 Instruction handbook . 278.2 Marking 30Annex A (informative) Typical Atmosphere Gases . 31Annex B (informative) Explosion Hazards of Gas Mixtures Con
20、taining Combustibles 32Annex C (informative) Inert Gas Purging . 34Annex D: Bibliography 36Annex E (informative) Used Definitions . 37Annex ZA (informative) !Relationship between this European Standard and the Essential Requirements of EU Directive 98/37/EC“ 40Annex ZB (informative) !Relationship be
21、tween this European Standard and the Essential Requirements of EU Directive 2006/42/EC“ 41DIN EN 746-3:2010-02 EN 746-3:1997+A1:2009 (E) 3 Foreword This document (EN 746-3:1997+A1:2009) has been prepared by Technical Committee CEN/TC 186 “Industrial thermoprocessing - Safety”, the secretariat of whi
22、ch is held by DIN. 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 December 2009, and conflicting national standards shall be withdrawn at the latest by December 2009. This document includes Amend
23、ment 1, approved by CEN on 2009-05-21. This document supersedes EN 746-3:1997. The start and finish of text introduced or altered by amendment is indicated in the text by tags ! “. The working group that drafted this Part of EN 746 comprised experts from the following countries: France, Germany, Ita
24、ly, Switzerland and the United Kingdom. This standard forms one part of safety standards covering Industrial Thermoprocessing Equipment. The full list of parts of this standard is given below: EN 746 Industrial Thermoprocessing Equipment Part 1: Common Safety Requirements for Industrial Thermoproces
25、sing Equipment Part 2: Safety Requirements for Combustion and Fuel Handling Systems Part 3: Safety Requirements for the Generation and Use of Atmosphere Gases Part 4: Particular Safety Requirements for Hot Dip Galvanising Thermoprocessing Equipment Part 5: Particular Safety Requirements for Salt Bat
26、h Thermoprocessing Equipment Part 6: Particular Safety Requirements for Material Melting, Remelting and Liquid Phase Maintaining Thermoprocessing Equipment Part 7: Particular Safety Requirements for Vacuum Thermoprocessing Equipment Part 8: Particular Safety Requirements for Quenching Equipment This
27、 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 informative Annexes ZA and ZB, which are integral parts of this document.“
28、An assessment of the foreseeable risks arising from the use of the equipment was carried out when this standard was prepared. DIN EN 746-3:2010-02 EN 746-3:1997+A1:2009 (E) 4 According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound
29、to implement 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, Swit
30、zerland and United Kingdom. DIN EN 746-3:2010-02 EN 746-3:1997+A1:2009 (E) 5 Introduction This standard has been prepared to be a harmonised standard to provide one means of conforming to the Essential requirements of the Machinery Directive and associated EFTA Regulations. The extent to which hazar
31、ds are covered is indicated in the scope of this standard. In addition, machinery shall comply as appropriate with !EN ISO 12100-1 and EN ISO 12100-2“ for hazards which are not covered by this standard. This European Standard is a type-C standard as defined in !EN ISO 12100-1 and EN ISO 12100-2“. !E
32、N 746-1 contains the common safety provisions for all types of industrial thermoprocessing equipment. This part of the standard details in addition those extra safety requirements for the equipment listed in the scope, which need special attention.“ The equipment dealt with and the extent to which h
33、azards are covered are indicated in the scope of this part of EN 746. Where for clarity an example of a preventative measure is given in the text, this should not be considered as the only possible solution. Any other solution leading to the same risk reduction is permissible if an equivalent level
34、of safety is achieved. This part of EN 746 assumes that the installations are operated and maintained by trained personnel. 1 Scope This part of EN 746 specifies safety requirements for atmosphere gas systems and their use in industrial thermo-processing equipment and associated plant, including sys
35、tems for the production of atmosphere gases by reaction inside the thermo-processing equipment. It applies to the supply of atmosphere gases, gaseous and liquid additions to, and their removal from industrial thermo-processing equipment and associated plant, confined to equipment integrated in the t
36、hermo-processing and associated plant. This part of EN 746 also details the anticipated significant hazards associated with atmosphere gas systems and their use in industrial thermo-processing equipment and specifies the appropriate preventative measures for the reduction or elimination of these haz
37、ards. This part of EN 746 does not apply to atmosphere process gases, essential safety equipment, start-up, operation and shut-down of thermo-processing plant for semi-conductor devices for which special additional engineering requirements are necessary. This part of EN 746 specifies the requirement
38、s to be met to ensure the safety of persons and property during commissioning, start up, operation, shut down and maintenance, as well as in the event of foreseeable faults or malfunctions which can occur in the equipment. It specifies the safety requirements at stages in the life of the equipment,
39、and its design, ordering, construction and use. This part of EN 746 applies to equipment which is placed on the market after the date of issue of this standard. The hazards covered by this Part of EN 746 are listed in clause 4. A table of typical atmosphere gases is given in Annex A. DIN EN 746-3:20
40、10-02 EN 746-3:1997+A1:2009 (E) 6 2 Normative references !The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments)
41、applies.“ !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 161, Automatic shut-off valves for gas burners and gas appliances !deleted text“ EN 298, Automatic gas burner control systems for
42、gas burners and gas burning appliances with or without fans EN 746-1, Industrial thermoprocessing equipment Part 1: Common safety requirements for Industrial Thermoprocessing Equipment EN 746-2, Industrial thermoprocessing equipment Part 2: Safety requirements for combustion and fuel handling system
43、s EN 60204-1, Safety of machinery Electrical equipment of machines Part 1: General requirements !(IEC 60204-1:2005, modified)“ EN 60519-1, Safety in electroheat installations Part 1: General requirements !(IEC 60519-1:2003)“ EN 60519-2, Safety in electroheat installations Part 2: Particular requirem
44、ents for resistance heating equipment !(IEC 660519-2:2006)“ !EN ISO 12100-1:2003, Safety of machinery Basic concepts, general principles for design Part 1: Basic terminology, methodology (ISO 12100-1:2003)“ !EN ISO 12100-2:2003, Safety of machinery Basic concepts, general principles for design Part
45、2: Technical principles (ISO 12100-2:2003)“ !IEC 60364-4-41, Low-voltage electrical installations Part 4-41: Protection for safety Protection against electric shock“ !IEC 60364-43, Electrical installations of buildings Part 4-43: Protection for safety Protection against overcurrent“ !deleted text“ !
46、IEC 60364-4-44, Low-voltage electrical installations Part 4-44: Protection for safety Protection against voltage disturbances and electromagnetic disturbances“ !deleted text“ !IEC 60519-3, Safety in electroheat installations Part 3: Particular requirements for induction and conduction heating and in
47、duction melting installations“ DIN EN 746-3:2010-02 EN 746-3:1997+A1:2009 (E) 7 3 Definitions For the purposes of this standard the following definitions apply: NOTE An alphabetic listing of the definitions, as well as their cross-references in German, French and English are given in informative Ann
48、ex E. 3.1 industrial thermo-processing and associated equipment Any equipment through or into which the atmosphere gases flow NOTE This includes atmosphere gas distribution systems, safety control equipment and the furnace or other enclosures in which atmosphere gases are used. 3.2 safe ignition temperature the minimum temperature at which spontaneous, safe auto-ignition of flammable gases occurs
