however the morphology and
composition of fume particles in the respirable
range (particles smaller than 4μm in diameter that
can penetrate to the deepest part of the lungs
where respiration occurs) have not been
extensively investigated and reported. This paper
presents an experimental study directed at
quantifying the characteristics (particle size and
composition as well as their concentration) of
respirable fume particulate. Statistically designed
experiments have been used to determine the
significant process variables in terms of such
responses as mean particle size, particle count,
and fume formation rate. The goal of the
experimental effort is to generate data and
relationships on fume formation for the SMAW
process so that decisions may be made by
manufacturers that reflect both productivity and
worker safety/health considerations.