Limit values refer to an oxygen content of 6 % for solid fuels and 3 % for liquid fuels.    ,

Solid fuels,50–100,  New plants:    20 (coal, lignite and other solid fuels)  ,
  Existing plants:    30 (coal, lignite and other solid fuels)  ,
100–300,  New plants:    20 (coal, lignite and other solid fuels)  ,
  Existing plants:    25 (coal, lignite and other solid fuels)  ,
> 300,  New plants:    10 (coal, lignite and other solid fuels)  ,
  Existing plants:    20 (coal, lignite and other solid fuels)  ,
Liquid fuels,50–100,  New plants:    20  ,
  Existing plants:      30 (in general)      50 for the firing of distillation and conversion residues within refineries from the refining of crude oil for own consumption in combustion plants    ,
Liquid fuels,100–300,  New plants:    20  ,
  Existing plants:      25 (in general)      50 for the firing of distillation and conversion residues within refineries from the refining of crude oil for own consumption in combustion plants    ,
> 300,  New plants:    10  ,
  Existing plants:      20 (in general)      50 for the firing of distillation and conversion residues within refineries from the refining of crude oil for own consumption in combustion plants    ,

Sinter plant,50,
Pelletization plant,  20 for crushing, grinding and drying    15 for all other process steps  ,
Blast furnace: hot stoves,10,
Basic oxygen steelmaking and casting,30,
Electric steelmaking and casting,  15 (existing)    5 (new)  ,

  Iron foundries:    all furnaces (cupola, induction, rotary); all mouldings (lost, permanent)  ,20,
Hot rolling,  20    50 where a bag filter cannot be applied due to the presence of wet fumes  ,

20,

5,
    Limit values refer to an oxygen content of 10 %.    ,

20,
20,
    Limit values refer to an oxygen content of 8 % for continuous melting and 13 % for discontinuous melting.    ,

20,
30,
    Limit value refers to an oxygen content of 11 %.    ,

10,