EN 746-3:1997+A1:2009
(Main)Industrial thermoprocessing equipment - Part 3: Safety requirements for the generation and use of atmosphere gases
Industrial thermoprocessing equipment - Part 3: Safety requirements for the generation and use of atmosphere gases
This part of EN 746 specifies safety requirements for atmosphere gas systems and their use in industrial thermo-processing equipment and associated plant, including systems 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 thermo-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 hazards.
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 requirements 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, 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.
Industrielle Thermoprozessanlagen - Teil 3: Sicherheitsanforderungen für die Erzeugung und Anwendung von Schutz- und Reaktionsgasen
Equipements thermiques industriels - Partie 3: Prescriptions de sécurité pour la génération et l'utilisation des gaz d'atmosphère
La présente partie de l'EN 746 fixe les prescriptions de sécurité pour les systèmes à gaz d'atmosphère et leur
utilisation dans les équipements thermiques industriels et usines associées, y compris les systèmes de production
de gaz d'atmosphère par réaction à l'intérieur de l'équipement thermique industriel.
La présente partie de l'EN 746 s'applique à l'alimentation de gaz d'atmosphère, à des adjonctions gazeuses
et liquides et à leur rejet de l'équipement thermique industriel et de l'usine associée, restreint à l'équipement intégré
à l'équipement de traitement thermique et à l'usine associée.
La présente partie de l'EN 746 décrit également en détail les risques significatifs identifiés dans les systèmes à gaz
d'atmosphère et de leur utilisation dans les équipements thermiques industriels et indique les mesures préventives
adaptées, permettant de limiter, voire d'éliminer ces risques.
La présente partie de l'EN 746 ne s'applique pas aux gaz d'atmosphère de traitement, à l'équipement de sécurité
principal et au démarrage, au fonctionnement et à l'arrêt des installations de traitement thermique pour dispositifs
à semi-conducteur, ceux-ci nécessitant des prescriptions supplémentaires en matière d'ingénierie.
La présente partie de l'EN 746 indique les prescriptions à suivre pour garantir la sécurité des personnes et des biens
lors de la mise en service, du démarrage, du fonctionnement, de l'arrêt et de la maintenance, ainsi que dans
l'éventualité d'une panne ou d'un dysfonctionnement qui peut se produire au niveau de l'équipement. Elle indique les
prescriptions en matière de sécurité, à différentes étapes de la vie de l'équipement ainsi que lors des phases de
conception, de commande, de fabrication et d'utilisation.
La présente partie de l'EN 746 s'applique à tout équipement mis sur le marché après la date de publication de
la norme.
Les risques traités dans cette partie de l'EN 746 sont énumérés à l'Article 4.
Industrijska termoprocesna oprema - 3. del: Varnostne zahteve za pridobivanje in uporabo atmosferskih plinov
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2009
Industrijska termoprocesna oprema - 3. del: Varnostne zahteve za pridobivanje in
uporabo atmosferskih plinov
Industrial thermoprocessing equipment - Part 3: Safety requirements for the generation
and use of atmosphere gases
Industrielle Thermoprozessanlagen - Teil 3: Sicherheitsanforderungen für die Erzeugung
und Anwendung von Schutz- und Reaktionsgasen
Equipements thermiques industriels - Partie 3: Prescriptions de sécurité pour la
génération et l'utilisation des gaz d'atmosphère
Ta slovenski standard je istoveten z: EN 746-3:1997+A1:2009
ICS:
25.180.01 ,QGXVWULMVNHSHþLQDVSORãQR Industrial furnaces in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 746-3:1997+A1
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2009
ICS 25.180.01 Supersedes EN 746-3:1997
English Version
Industrial thermoprocessing equipment - Part 3: Safety
requirements for the generation and use of atmosphere gases
Equipements thermiques industriels - Partie 3: Industrielle Thermoprozessanlagen - Teil 3:
Prescriptions de sécurité pour la génération et l'utilisation Sicherheitsanforderungen für die Erzeugung und
des gaz d'atmosphère 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 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 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
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, 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, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 746-3:1997+A1:2009: E
worldwide for CEN national Members.
Contents Page
Foreword .3
Introduction .5
1 Scope .5
2 Normative references .6
3 Definitions .7
4 List of hazards . 10
5 Safety requirements for the use of atmosphere gases. 16
5.1 Purging . 16
5.2 Safety control equipment for atmosphere gases . 17
5.3 Thermo-processing equipment requirements . 18
6 Safety requirements for atmosphere gas generators . 22
6.1 Reaction gas supplies . 22
6.2 Fuel gas supplies . 23
6.3 Air supplies . 23
6.4 Mixture supplies. 24
6.5 Electrical supplies . 24
6.6 Cooling water supplies and discharge . 24
6.7 Atmosphere gas supplies and distribution . 25
6.8 System requirements . 25
7 Verification of the safety requirements and/or measures . 27
8 Information for use . 27
8.1 Instruction handbook . 27
8.2 Marking . 30
Annex A (informative) Typical Atmosphere Gases . 31
Annex B (informative) Explosion Hazards of Gas Mixtures Containing Combustibles . 32
Annex C (informative) Inert Gas Purging . 34
Annex D: Bibliography . 36
Annex E (informative) Used Definitions . 37
Annex ZA (informative) !Relationship between this European Standard and the Essential
Requirements of EU Directive 98/37/EC" . 40
Annex ZB (informative) !Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC" . 41
Foreword
This document (EN 746-3:1997+A1:2009) has been prepared by Technical Committee CEN/TC 186
“Industrial thermoprocessing - Safety”, the secretariat of which 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 Amendment 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, Italy, 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 Thermoprocessing 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 Bath 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 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."
An assessment of the foreseeable risks arising from the use of the equipment was carried out when this
standard was prepared.
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, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and United Kingdom.
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 hazards 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".
!EN 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 hazards 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 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 systems 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 thermo-
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 hazards.
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 requirements 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, 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.
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) 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 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 systems
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 requirements for resistance heating
equipment !(IEC 660519-2:2006)"
!EN ISO 12100-1:2003, Safety of mach
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.