Hazard Assessment

Due to the classification of welding fumes as a hazardous substance, a risk assessment must be carried out. This is done in 5 easy steps: 

1. Composition of welding fumes affected by:

  • Base material
  • Coatings
  • Filler metal and
  • Process gases.

2. Determining the health hazards of welding smoke constituents:

  • Substances that place strain on respiratory tract and lungs (eg: iron oxides, aluminium oxide)
  • Toxic or toxic-irritating substances (eg:  manganese oxide, copper oxide, zinc oxide)
  • carcinogenic substances (eg:  chromium (VI) compounds, nickel oxide)

3. Determining the hazard class depending on the procedure. 

4. Determining working conditions

  • Spatial conditions
  • Head and body position in overhead position
  • Welding time


5. The overall risk assessment is based on the hazard class (step 3) and working conditions (step 4):

  • The hazard may be increased, for example, if welding time is long and/or welding is carried out in an overhead position
  • On the other hand, with short welding times, or welding work outdoors, the hazard may be reduced.

>> to 1. Overview
>> to 3. Meaures of fume extraction
>> to 4. Effectiveness check

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