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Summary of plant observation reports and evaluations for tungsten and its compounds.

Authors
Anonymous
Source
SRI International, Menlo Park, California 1977 Mar; :1-286
Link
NIOSHTIC No.
00074911
Abstract
Summaries and evaluations of the seven plants visited for the criteria document are reported. The visits occurred from October 21, 1976 to February 10, 1977 and included Boeing, Li Tungsten Corporation, Kennametal, Inc., GTE Sylvania, Union Carbide Corporation, General Electric (Carboloy Systems), and Union Carbide Corporation (Metals Division). Aspects covered in each report include description of the process, medical, labeling, personal protective equipment, informing employees of hazards, work practices, sanitation, and environmental monitoring. Documentation is also given to support statements. Three plants processed ores to obtain ammonium-p-tungstate or tungsten (7440337) metal powder and three others used ammonium-p-tungstate as the basic material in preparing tungsten or tungsten-carbide powders. Among the various processes, the potential for occupational exposure exists mainly in ore grinding, loading, unloading, mixing, ball milling and grinding of the cemented tungsten-carbide tools. Protective measures include exhaust ventilation systems, barriers beneath grinding wheels for collecting and channeling coolants, use of enclosed areas, and automation. Most of the companies considered tungsten or its compounds as not hazardous and virtually no monitoring or posting hazards referring to tungsten is done. The little monitoring that was done showed values ranging from 0.2-36.3 milligrams per cubic meter. (Contract No. 099-74-0031)
Keywords
NIOSH-Contract; Contract-099-74-0031; Tungsten; Evaluations; Cemented-tungsten-carbide; Primary-metallurgical-processes; Metals; Work-operations; Metal-fabrication-workers; Air-quality; Transition-metals; Health; Metalworking; Tungsten-compounds
CAS No.
7440-33-7
Publication Date
19770301
Document Type
Final Contract Report
Funding Type
Contract
Fiscal Year
1977
NTIS Accession No.
NTIS Price
Identifying No.
Contract-099-74-0031
Source Name
SRI International, Menlo Park, California
State
CA
Performing Organization
SRI International, Menlo Park, California
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