It is not possible to provide a workplace-related emission value during welding (or cut-
ting) as this is influenced by both the process and the environment. All manner of differ-
ent welding parameters come into play, including the welding process (MIG/MAG, TIG
welding), the type of power selected (DC or AC), the power range, the type of weld
metal, the resonance characteristics of the workpiece, the workplace environment, etc.
Danger from
toxic gases and
vapours
The fumes produced during welding contain harmful gases and vapours.
Welding fumes contain substances that cause cancer, as stated in Monograph 118 of the
International Agency for Research on Cancer.
Use at-source extraction and a room extraction system.
If necessary, use a welding torch with an integrated extraction device.
Keep your face away from welding fumes and gases.
Fumes and hazardous gases
-
must not be breathed in
-
must be extracted from the working area using appropriate methods.
Ensure an adequate supply of fresh air. Ensure that there is a ventilation rate of at least
20 m³ per hour at all times.
Otherwise, a welding helmet with an air supply must be worn.
If there is any doubt about whether the extraction capacity is sufficient, the measured
toxic emission values should be compared with the permissible limit values.
The following components are responsible, amongst other things, for the degree of tox-
icity of welding fumes:
-
Metals used for the workpiece
-
Electrodes
-
Coatings
-
Cleaners, degreasers, etc.
-
Welding process used
The relevant material safety data sheets and manufacturer's specifications for the listed
components should therefore be studied carefully.
Recommendations for trade fair scenarios, risk management measures and for identify-
ing working conditions can be found on the European Welding Association website under
Health & Safety (https://european-welding.org).
Flammable vapours (e.g. solvent fumes) should be kept away from the arc's radiation
area.
Close the shielding gas cylinder valve or main gas supply if no welding is taking place.
Danger from fly-
ing sparks
Flying sparks may cause fires or explosions.
Never weld close to flammable materials.
Flammable materials must be at least 11 metres (36 ft. 1.07 in.) away from the arc, or
alternatively covered with an approved cover.
A suitable, tested fire extinguisher must be available and ready for use.
Sparks and pieces of hot metal may also get into adjacent areas through small gaps or
openings. Take appropriate precautions to prevent any danger of injury or fire.
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