NBN EN 746-3 : 1997 + A1 2009

Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
4 Lists of hazards
5 Safety requirements for the use of atmosphere gases
6 Safety requirements for atmosphere gas generators
    6.1 Reaction gas supplies
    6.2 Fuel gas supplies
    6.3 Air supplies
    6.4 Mixture supplies
    6.5 Electrical supplies
    6.6 Cooling water supplies and discharge
    6.7 Atmosphere gas supplies and distribution
    6.8 System requirements
7 Verification of the safety requirements and/or measures
8 Information for use
    8.1 Instruction handbook
    8.2 Marking
Annexes
A (informative) Typical atmosphere gases
B (informative) Explosion hazards of gas mixtures
C (informative) Inert gas purging
D (informative) Bibliography
E (informative) Used definitions
ZA (informative) Clauses of this European Standard
    addressing essential requirements or other provisions
    of EU Directives

Defines safety requirements for atmosphere gas systems for use in industrial thermoprocessing equipment and associated plant. Includes systems for producing atmosphere gases by reaction inside the thermoprocessing equipment.