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KMID : 0895419910010010068
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Journal of Korean Society of Occupational and Enviromental Hygiene
1991 Volume.1 No. 1 p.68 ~ p.72
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A Study on the Concentration of Welding Fume in a Shipbuilding Factory
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Abstract
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The present investigation studied the welding fumes produced during the arc welding process at a shipyard. The air at the shipyard was sampled (between February and May, 1990) to determine the total welding fume concentration, its heavy metal content and the concentrations of different sited particles of the welding fumes.
The results were as follows :
1. Forty-four out of 50 samples showed welding fume concentrations which exceeding the threshold limit value of 5㎎/㎥. The geometric mean of welding fume concentration was 9.735㎎/㎥ (2.14-24.86㎎/㎥), and the highest level was found at the dock assembly shop (12.05㎎/㎥).
2. The welding fume concentration measured with personal air sampler was 4.2 times greater than that measured with area sampler.
3. Of the heavy metals analyzed, Fe was found to be the most concentrated at 1.295㎎/㎥ ; it constituted 13.3% of the total welding fume concentration.
4. Of the different sized particles that make up the welding fumes, there was a tendency for the smaller particles to be more concentrated.
Particles that measured 7μ or less ire diameter constituted 85.8% of the total welding fume concentration.
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