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Welding helmet airborne fume concentrations compared to personal breathing zone sampling.

Authors
Liu-D; Wong-H; Quinlan-P; Blanc-PD
Source
Am Ind Hyg Assoc J 1995 Mar; 56(3):280-283
NIOSHTIC No.
00225663
Abstract
A study was conducted on the effectiveness of welding helmets in reducing the exposure of workers to metal fumes. Experienced welders performed routine electric arc welding on galvanized mild steel in an environmental exposure chamber while wearing welding helmets. Air samples obtained from the breathing zones of the subjects and from within the helmets were collected and analyzed for metal fumes. Iron (7439896) levels were greater in 44% of the samples from inside the helmets compared with outside levels while 35% of zinc (7440666) exposures were higher inside compared with outside. The mean ratio of the inside to outside concentrations of iron was 0.9 and the median was 0.96. Similar values were seen for zinc. Decreasing ratios were seen with increasing outside concentrations of either iron or zinc. The authors conclude that any attenuation of metal gas fumes accomplished by the use of welding helmets is highly variable and sometimes negligible under heavy exposure situations.
Keywords
NIOSH-Publication; NIOSH-Grant; Pulmonary-system-disorders; Protective-equipment; Personal-protective-equipment; Welders-helmets; Arc-welders; Metal-fumes; Occupational-exposure
Contact
Cardiovascular Research Inst University of California PO Box 0924 San Francisco, CA 94143-0924
CODEN
AIHAAP
CAS No.
7439-89-6; 7440-66-6
Publication Date
19950301
Document Type
Journal Article
Funding Amount
157960
Funding Type
Grant
Fiscal Year
1995
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-K01-OH-00079
Issue of Publication
3
ISSN
0002-8894
Priority Area
Pulmonary-system-disorders
Source Name
American Industrial Hygiene Association Journal
State
CA
Performing Organization
University of California San Francisco, San Francisco, California
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