The severity of welding fume exposure is based on three things:
1. How effective the current extraction system is.
2. What type of welding takes place.
3. How long an operator is exposed to hazardous particulate.
Welding gases do not always have an odor and because of their submicron size can't be seen by the human eye which makes them exceptionally dangerous.
The heat from a welding flame has the ability to produce carbon dioxide, carbon monoxide, and oxides of nitrogen. Fumes and gases also develop through coatings or solvents used on the metal being welded.
Prolonged exposure to welding contaminants can result in severe injuries such as metal fume fever, cancer, and possible death.
|Welding Process Hazards||OSHA Welding Regulations|
Arc Welding: Joins two metals by generating an electric arc between a covered metal electrode and the base metal.
Oxygen and Arc Cutting: The most common metal cutting processes in welding. Severs or removes metal by flame or arc.
Gas Welding: Slower and easier to control than electric arc welding. Utilizes a gas flame over metals until a molten puddle is formed.
The most popular fuels used with oxygen are:
Fire Prevention Safeguards:
NOTE: Precautions must be taken during long pauses (during lunch breaks or overnight) in arc welding to prevent accidental contact of electrodes torch valve gas leaks in gas welding.
|Naural and Mechanical Ventilation||Health Protection and Ventilation|
||General requirements for protecting welders are based on 3 factors:
For more information, download the OSHA Welding, Cutting, and Brazing ppt.