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FINDING THE BEST SOLUTION
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To
determine the filtration best suited to your facility, begin
by considering the current level of activity, as well as
what's likely in the future. Ambient air intake
filtration, where plant dusts and welding emissions are
filtered together, may suffice if there's just one welding
operation, and welding is incidental.
(If this is the case
click here to see
information regarding
Selecting "Free Hanging" Ambient Air Filtration Equipment
5 Step
worksheet to help in the selection process.)
Where welding is
multi-station or ongoing, source capture, through the use of
an air intake hood system in close proximity to the
workstation, will be needed to be effective. By
"effective" we mean capable of capturing, efficiently and
consistently, both fumes and heavier particulates. The
second part of being "effective" is that the device can do
its work for extended periods, and without creating a
maintenance issue.
If
source capture is required, the first step is to quantify
the airflow required to draw fumes and fine particles away
from the welder. As a practical matter, to collect all
particulates would require such a huge airflow that it would
detrimentally affect the welding process. So, the
largest particulate will not be extracted. The
collection of fine particles and the fumes that OSHA
regulates is the mission.
OSHA Standard 29 CFR 1910.1026
ıPhil Weber, Welding Processes Pose Tough Challenge for
Fume Filtration, (Welding Design and Fabrication) 9/03
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