ARC WELDING SAFETY PRECAUTIONS
PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJURY OR DEATH. READ AND UNDERSTAND
BOTH THE SPECIFIC INFORMATION GIVEN IN THE OPERATING MANUAL FOR THE WELDER AND/OR
OTHER EQUIPMENT TO BE USED AS WELL AS THE FOLLOWING GENERAL INFORMATION.
1. HAVE ALL INSTALLATION, OPERATION, MAINTENANCE AND
REPAIR WORK performed only by qualified people.
2. ELECTRIC SHOCK can kill.
Protect yourself from possible dangerous electrical shock:
The electrode and work (or ground) circuit are electrically -
hot when the welder is on Never permit contact between
hot parts of the circuits and bare skin or wet clothing Wear
dry, hole-free gloves to Insulate hands.
Always insulate yourself from the work and ground by using
dry insulation When welding In damp locations. on metal
floors, gratings or scaffolds. and when in positions (such as
sitting or lying). make certain the insulation r large enough
to cover your full area of physical contact with work and
Maintain the electrode holder, work clamp. welding cable
and welding machine In good, safe operating condition
Never dip the electrode holder In water for cooling.
Never simultaneously touch electrically 'hot" parts of
electrode holders connected to two welders because voltage
between the two can be the total of the open circuit voltage
of both welders.
If using the welder as a power source for mechanized
welding, the above precautions also apply for the automatic
electrode. electrode reel, welding head, nozzle or
semiautomatic welding gun
When working above floor level. protect yourself from a fall
should you get a shock.
Ground the work or metal to be welded to a good electrical
Also see Item 7.
3. FUMES AND GASES can be dangerous to your health.
Welding may produce fumes and gases hazardous to health
Avoid breathing these fumes and gases When welding.
keep your head out of the fume Use enough ventilation
and/or exhaust at the arc to keep fumes and gases away
from the breathing zone When welding on galvanized, lead
or cadmium plated steel and other metals which produce
toxic fumes, even greater care must be taken.
Do not weld in locations near Chlorinated hydrocarbon
vapors coming from degreasing cleaning or spraying
operations The heat and rays of the arc can react with
solvent vapors to form phosgene a highly toxic gas and other
Also see Item 8b.
4. ARC RAYS can Injure eyes and burn skin.
Use a shield with the proper filter and cover plates to protect
your eyes from sparks and the rays of the arc when welding
or observing open arc welding Filter lens should conform to
ANSI Z87.1 standards.
Use suitable clothing made from durable flame-resistant
material to protect your skin and that of your helpers from
the arc rays.
Protect other nearby personnel with suitable non-flammable
screening and/or warn them not to watch the arc nor expose
themselves to the arc rays or to hot spatter or metal.
5. FIRE OR EXPLOSION can cause death or property damage.
Remove fire hazards well away from the area. If this is not
possible cover them to prevent the welding sparks from
staffing a fire Remember that welding sparks and hot
materials from welding can easily go through small cracks
and openings to adjacent areas Have fire extinguisher
Where compressed gases are to be used at the job site.
special precautions should be used to prevent hazardous
situations Refer to "Safety in Welding and Cutting" (ANSI
Standard Z49 1) and the operating information for the
equipment being used.
When not welding, make certain no part of the electrode
circuit is touching the work or ground Accidental contact can
cause overheating and create a fire hazard.
Do not heat, cut or weld tanks, drums or containers until the
proper steps have been taken to insure that such procedures
will not cause flammable or toxic vapors from substances
inside They can cause an explosion even though they have
been "cleaned " For information purchase Recommended
Safe Practices for the Preparation fur Welding and Cutting of
Containers and Piping That Have Held Hazardous
Substances". AWS F4 1-80 from the American Welding
Society, Miami Florida 33125
Vent hollow castings or containers before heating. cutting or
welding. They may explode
Also see Items 6c and 8c.
Additional Safety Precautions
6. For Welding In General.
Droplets of molten slag and metal are thrown or fall from the
welding arc Protect yourself with oil free protective garments
such as leather gloves, heavy shirt, cuffless trousers, high
shoes and a cap over your hair. Wear ear plugs when
welding out of position or in confined places Always wear
safety glasses when in a welding area Use glasses with side
shields when near slag chipping operations.
Keep all equipment safety guards, covers and devices in
position and in good repair. Keep hands, hair clothing and
tools away from V-belts, gears, fans and all other moving
parts when starting operating or repairing equipment.
Be sure the work cable is connected to the work as close to
the welding area as practical Work cables connected to the
building framework or other locations some distance from
the welding area Increase the possibility of the welding
current passing through lifting chains crane cables or other
alternate circuits. This can create tire hazards or overheat
lifting chains or cables until they fall.
7. For Electrically Powered Equipment.
Disconnect and lock out all electric power sources before
doing any work on the equipment.
Make the electrical Installation in accordance with the
National Electrical Code and all local codes.
Properly ground the equipment in accordance with the
8. For Engine Powered Equipment.
Turn the engine off before troubleshooting and maintenance
work unless the maintenance work requires it to be running.
Operate internal combustion engines In open well-ventilated
areas or vent the engine exhaust fumes outdoors.
Do not add the fuel near an open flame or when the engine
is running Stop the engine and if possible, allow It to cool to
prevent spilled fuel from Igniting on contact with hot engine
parts or electrical sparks Do not spill fuel when filling tank It
fuel is spilled wipe it up and do not start engine until fumes
have been eliminated.
To prevent accidentally starting gasoline engines while
turning the engine or welding generator during maintenance
work disconnect the spark plug wires distributor cap or
magneto wire as appropriate.
To avoid scalding, do not remove the radiator pressure cap
when the engine is hot.
For more detailed Information It Is strongly recommended that you purchase a copy of
"Safety in Welding & Cutting" - ANSI Standard Z49.1" from the American Welding Society, P.O. Box 351040
Miami, Florida 33135.