EN 12952-8:2002

Foreword
1 Scope
   1.1 Firing systems
   1.2 Fuels
   1.3 Operation
2 Normative references
3 Terms and definitions
4 Fuel supply
   4.1 General
   4.2 Fuel transfer and preparation
   4.3 Fuel lines
   4.4 Safety shut-off devices (Safety trip valves)
5 Equipment for air supply and flue gas discharge
   5.1 Air supply
   5.2 Air/fuel ratio
   5.3 Flue gas discharge
6 Firing system
   6.1 Burners
   6.2 Flue gas recirculation
   6.3 Control and monitoring
   6.4 Electrical equipment
   6.5 Safety precautions
   6.6 Common stack for several firing systems
7 Operating manual
8 Particular requirements for firing systems burning gaseous
   fuels with high relative density
   8.1 Main firing systems
   8.2 Ignition burner systems
Annex A (normative) Chemical recovery boiler (black liquor
        boiler)
   A.1 General
   A.2 Additional requirements for the firing system for
        black liquor in the chemical recovery boiler
   A.3 Special requirements for oil- or gas-firing for
        chemical recovery boilers
Annex B (informative) Operational requirements for permanent
        supervised firing systems for liquid and gaseous fuels
   B.1 General
   B.2 Operation
   B.3 Fuel preparation
   B.4 Safety shutoff devices
   B.5 Air/fuel ratio
   B.6 Modification of firing, burner or air/fuel
        ratio setting
   B.7 Control and monitoring
   B.8 Purging, start-up and shut down
   B.9 Emergency operation
   B.10 Operating and maintenance instructions
   B.11 Firing systems burning gaseous fuels with relative
        density
Annex ZA (informative) Clauses of this European Standard
         addressing essential safety requirements or other
         provisions of the Pressure Equipment Directives
Bibliography

1. Firing systems: These requirements apply to oil and gas firing systems of steam and hot water generators. For multifuel firing systems using separate or combined burners these requirements shall apply to the oil and/or gas firing part involved. Where several fuels are burnt simultaneously, improved safety measures may be necessary, especially in respect to limitation of heat input into the firing system and proper air supply to the individual fuels. 2. Fuels (...) 3. Operation (...)