Assessment of selected control technology techniques for welding fumes.
NIOSH 1979 Jan; :1-29
Dilution air directional movement and a smoke exhaust welding gun were used in an attempt to reduce welding fumes at the General Tool Company in Reading, Ohio. Fume composition and sources were determined. General work area and personal air samples were collected for analysis before and after the experimental control measures were instituted. In dilution air directional movement tests, cross draft airflow significantly reduced breathing zone fume concentrations. No change in fume concentration occurred when the air flow came from directly behind the welder's back. The smoke exhaust gun reduced breathing zone fume concentrations by about 70 percent during semicontinuous and continuous flux core and metal inert gas welding operations. The authors conclude that directional air flow from local fans can only be used in limited situations. The smoke exhaust gun can effectively control welding fumes if it is cleaned frequently and maintained at top efficiency.
NIOSH-Author; Control-technology; Toxic-fumes; Industrial-processes; Poison-gases; Carcinogens; Airborne-chemicals; Welding-repair
NTIS Accession No.
National Institute for Occupational Safety and Health