This method describes a laboratory device and procedure forobtaining representative fume samples and determining fumegeneration rates of welding and allied processes.
A separate collection procedure for determining fumeconstituents is described.
A standard set of fume generation test conditions is specifiedto calibrate the sampling equipment.
Methods for obtaining breathing zone and general area weldingfume 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 withacknowledged technical advancements in the field.
This standard makes sole use of U.S. Customary Units except formeasures of mass, fume generation rate, and filter pore size.Approximate mathematical equivalents in the International System ofUnits (SI) are provided for comparison in parentheses or inappropriate columns in tables and figures.
Purpose
Welding and allied processes produce fumes and gases. The amountor rate generated by a particular process and material depends uponthe conditions of use. The laboratory sampling procedure describedherein is designed to evaluate the effects of variations inmaterials, processes, and operating conditions on fume generationrate. Fume generation rates can be useful in prescribing adequateventilation, making process selections, influencing processvariables, and calculating air filtering requirements. In order toprovide a safe working environment, it may be necessary to comparethe fume generation rate and identify the constituents present inthe fumes of various processes.
The samples obtained using the techniques described herein arerepresentative of the fumes present and, if collected onappropriate filters, may be used for fume constituent analyses.
This procedure is designed for a short testing time, normallytwo minutes or less, which yields useful results that arereproducible within an acceptable range. The method described inthis procedure is suitable for use with the majority of welding andallied processes and allows for variation of selectedconditions.
Fume generation rate data, if collected in accordance with thisprocedure, can be correlated to and compared with data fromdifferent sources.
- Edition:
- 6
- Published:
- 01/01/2013
- ANSI:
- ANSI Approved
- Number of Pages:
- 26
- File Size:
- 1 file , 380 KB
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