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3.4. ENVIRONMENT.
•
Arc welding produces sparks, melted metal projection and smoke. Remove all flammable
substances and/or materials from the work area.
•
Always ensure good ventilation at the place of welding.
•
Do not weld on containers, recipients or pipes that contain gas or have contained flammable,
liquid or gaseous products (danger of explosion and/or fire), nor on materials polished with
chlorinated or varnished solvents (danger of toxic smoke emanation).
3.5. STAFF.
•
Avoid direct contact with the welding circuit; the open circuit voltage, present between the
electrode holder clamp and the ground clamp, could be dangerous in such circumstances.
•
Do not use the machine in damp, wet or rainy environments.
•
Protect your eyes, using appropriate inactinic crystals mounted on the corresponding mask. Wear
gloves and protective clothing dry and free of oils, avoiding exposing the skin to ultraviolet rays
produced by the arc.
3.6. REMEMBER.
•
Luminous radiations produced by the arc may damage the eyes and cause skin burns.
•
Arc welding produces sparks and drops of melted metal. The welded metal (work) becomes red
and burns at high temperature, for a relatively long period of time.
•
Arc welding produces smoke, which can be potentially harmful.
•
All electric shocks can be potentially high.
•
Avoid exposing yourself directly to the electric arc within a radius of less than 15 meters
•
Also protect nearby people with appropriate means against the potentially dangerous effects of
the arc.
3.7. OPERATOR PROTECTION.
•
Operator's clothing must be dry and free of oils.
•
Do not climb or lean on the work pieces when the power supply is on.
•
To prevent electric shock, do not work in wet or damp environments without adequate protective
clothing.
•
Check welding and power cables and replace immediately in case of damaged cables.
•
Disconnect power before carrying out any equipment maintenance work.
•
To avoid any risk of accidental short circuit or ignition of the arc, do not place the electrode holder
directly on the workbench or any metal surface connected to the ground clamp of the machine.
WARNING: Electromagnetic fields generated by high welding currents can cause the malfunction
of vital electronic devices.
3.8. PREVENTION OF TOXIC FUMES.
The following precautions should be taken to prevent exposure of the operator, other people and
animals to the toxic fumes that may be generated during the welding process.
•
Avoid welding operations on painted surfaces, or with oil or grease.
•
Some chlorinated solvents can decompose during welding and generate dangerous gases such as
phosgene. It is therefore essential to ensure that such solvents are not present in the pieces to be
welded. Otherwise, they will need to be removed prior to welding. You should also make sure
that these solvents, or other unpleasant agents, are not in the immediate vicinity of the work
area.
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