This method describes a laboratory device and procedure for
obtaining representative fume samples and determining fume
generation rates of welding and allied processes.
A separate collection procedure for determining fume
constituents is described.
A standard set of fume generation test conditions is specified
to calibrate the sampling equipment.
Methods for obtaining breathing zone and general area welding
fume samples are not within the scope of this standard.
Sampling of gases is not within the scope of this standard.
This standard will be revised as required in accordance with
acknowledged technical advancements in the field.
This standard makes sole use of U.S. Customary Units except for
measures of mass, fume generation rate, and filter pore size.
Approximate mathematical equivalents in the International System of
Units (SI) are provided for comparison in parentheses or in
appropriate columns in tables and figures.
Welding and allied processes produce fumes and gases. The amount
or rate generated by a particular process and material depends upon
the conditions of use. The laboratory sampling procedure described
herein is designed to evaluate the effects of variations in
materials, processes, and operating conditions on fume generation
rate. Fume generation rates can be useful in prescribing adequate
ventilation, making process selections, influencing process
variables, and calculating air filtering requirements. In order to
provide a safe working environment, it may be necessary to compare
the fume generation rate and identify the constituents present in
the fumes of various processes.
The samples obtained using the techniques described herein are
representative of the fumes present and, if collected on
appropriate filters, may be used for fume constituent analyses.
This procedure is designed for a short testing time, normally
two minutes or less, which yields useful results that are
reproducible within an acceptable range. The method described in
this procedure is suitable for use with the majority of welding and
allied processes and allows for variation of selected
Fume generation rate data, if collected in accordance with this
procedure, can be correlated to and compared with data from
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