EN 12953-7:2002

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Fuel supply
  4.1 Fuel transfer and preparation
  4.2 Fuel lines
  4.3 Safety shut-off devices (Safety trip valves)
5 Air supply, air/fuel ratio
6 Firing system
  6.1 Burners
  6.2 Inspection openings
  6.3 Purging, start-up and shutdown
  6.4 Common stack for several firing systems
  6.5 Fuels
Annex ZA (informative) Clauses of this European Standard
         addressing essential requirements or other provisions
         of EU Directives
Bibliography

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.