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AIHce On Demand_Welding Fume Generation, Exposure Monitoring, Assessment, and Control

Recorded at AIHce 2015
Earn 3 Contact Hours

Session Arranger: A. Siert, Xcel Energy
Session Moderator: J. Spear, J.E. Spear Consulting, LP

Welding fume exposures continue to be of interest to industrial hygienists due to the large percentage of welders in the industrial workforce and the potential adverse health effects of exposure. Fume generation studies are being conducted to characterize fume constituents by the various exposure variables, including the welding processes and other allied thermal processes. The manganese (Mn) TLV® was recently reduced from 0.2 to 0.02 mg/m3 measured as “respirable fraction,” creating exposure monitoring challenges since, although welding fumes are respirable, grinding dust and other larger particles commonly associated with welding operations are generally not within the respirable size distribution. Welding exposure monitoring has long been specified to be conducted inside the hood; however, conventional respirable size sampling devices preclude this approach. Hexavalent chromium (Cr6), a potent lung carcinogen and fume constituent emitted from welding chromium alloy steel, continues to be a focus of fume exposure studies. Recent efforts have been made in manufacturing of welding electrodes and wire to reduce the generation of Mn and Cr6, and controlled comparisons of exposures, production rate, quality and cost are being conducted in order to optimally select processes.

• A New Approach to Reducing Manganese Exposure During Welding
     A. Fiore, Hobart Brothers Welding
• The Viability of Particle-Size Selective Exposure Assessments for Welding and Allied Processes
     J. Spear, J.E. Spear Consulting, LP
• Welding Process Comparisons in the Field to Optimize Process Selection.
     A. Siert, Xcel Energy
• Placement of Sample Media and Welder Respiratory Protection
     M. Harris, Hamlin & Harris
• Manganese Fractionation Using a Sequential Extraction Method to Evaluate Welders’ Shielded Metal Arc Welding Exposures at Oil Refineries
     H. Kevin, CDC/NIOSH
• Controlled Comparison of P91 (9% Cr) SMAW Versus FCAW for Fume Exposure Levels, Production Rate, Quality and Cost to Determine Benefit of Process Change
     A. Siert, Xcel Energy

Stock #: AOD15_RT210
ISBN #: 

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