Helvi GALILEO 179 Manual De Instrucciones página 15

sides. The helmet or the face shield should
be fitted with protective glasses adequate to
the welding process and current used. Glass
screens must always be kept clean, and im-
mediately replaced if they are broken or cra-
cked (Fig.2). It is good practice to install a
pane of transparent glass on top of the adiac-
tinic glass, between it and the welding area.
This pane can be frequently replaced when
incandescent spatters and deposits greatly
reduce visibility. When working with coated
plates that emit toxic fumes when heated,
use an air-supplied respirator.
Fig.2
- Welding should be done in a closed area
that does not open onto other working areas,
in order to protect all workers against radia-
tion and fumes. If such an area cannot be
provided, the welding area must be delimi-
ted by protective screens painted in opaque
black large enough to restrain the visibility of
any person situated near the area (Fig. 3).
Fig.3
- Remove all chlorinated solvents from the
welding area before welding. Certain chlori-
nated solvents decompose when exposed to
ultraviolet radiation to form phosgene gas.
- Never, under any circumstances, look at
an electric arc without suitable eye protection
(Fig. 4).
Fig.4
- Always wear protective goggles with tran-
sparent lenses to prevent splinters or other fo-
reign particles from harming the eyes (Fig. 5).
Fig.5
- Adequate local exhaust ventilation must
be used in the area. It should be provided
through a mobile hood or through a built-
in system on the workbench that provides
exhaust ventilation from the sides, the front
and below, but not from above the bench so
as to avoid raising dust and fumes. Local
exhaust ventilation must be provided toge-
ther with adequate general ventilation and
air circulation, particularly when work is done
in a confined space. (Fig.6). Any symptom of
stain or soreness to the eyes, the nose or the
throat may be cause by inadequate ventila-
tion; work must be stopped immediately and
all necessary steps must be taken to provide
adequate ventilation.
EN-2
Fig.6