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Document ID (ISN)101975
CIS number 03-865
ISSN - Serial title 0003-4878 - Annals of Occupational Hygiene
Year 2001
Convention or series no.
Author(s) Okuno T., Ojima J., Saito H.
Title Ultraviolet radiation emitted by CO2 arc welding
Bibliographic information Oct. 2001, Vol.45, No.7, p.597-601. Illus. 13 ref
Abstract The arcs associated with arc welding emit high levels of ultraviolet radiation (UVR), and this often causes acute injuries in the workplace, particularly photokeratoconjunctivitis. In this study, the effective irradiance for UVR was measured experimentally for CO2 arc welding in order to evaluate its UVR hazards. A welding robot was used in the experiment in order to ensure reproducible and consistent welding conditions. The effective irradiance at 1m from the arc was in the range 0.28-7.85W/m2 under the study conditions. The corresponding permissible exposure time per day is only 4-100s, suggesting that UVR from CO2 arc welding is actually hazardous for the eye and skin. It was found that the effective irradiance is inversely proportional to the square of the distance from the arc, is strongly dependent on the direction of emission from the arc with a maximum at 50-60░ from the plate surface, and tends to increase with the welding current.
Descriptors (primary) carbon dioxide; health hazards; arc welding and cutting; ultraviolet radiation
Descriptors (secondary) Japan; irradiation; conjunctivitis; keratitis; experimental determination; permissible levels; hazard evaluation; length of exposure; skin injuries; robots
Document type D - Periodical articles
Country / State or ProvinceJapan
Subject(s) Metal production and metalworking
Broad subject area(s) Physical hazards
Browse category(ies) Inorganic substances
Non-ionizing radiation
Carbon dioxide
Welding and cutting