Lincoln Electric Pro-MIG 140 User Manual download pdf (Page 3)

SAFETY

WELDING SPARKS can

cause fire or explosion.

4.a.

Remove fire hazards from the

welding area.

If this is not possi-

ble, cover them to prevent the

welding sparks from starting a fire.

Remember that welding sparks

and hot materials from welding

can easily go through small cracks

and openings to adjacent areas.

Avoid welding near hydraulic lines.

Have a fire extinguisher readily

available.

4.b.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.

4.c. 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.

4.d.Do not heat, cut or weld tanks, drums or con-

tainers until the

proper steps have been taken to

insure that such procedures

will not cause flam-

mable 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

for Welding and Cutting of

Containers and Piping That Have Held

Hazardous Substances”, AWS F4.1 from the

American Welding Society

(see address above).

4.e.Vent hollow castings or containers before heat-

ing, cutting or welding. They may explode.

4.f.

Sparks and spatter are thrown from the welding

arc. Wear 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 with side

shields when in a welding area.

4.g.Connect the work cable to the work as close to

the welding area as practical. Work cables con-

nected to the building framework or other loca-

tions away from the welding area increase the

possibility of the welding current passing through

lifting chains, crane cables or other alternate cir-

cuits. This can create fire hazards or overheat

lifting chains or cables until they fail.

ELECTRIC SHOCK can kill.

5.a.The electrode and work (or ground)

circuits are electrically “hot” when the

welder is on. Do not touch these

“hot” parts with your bare skin or wet

clothing. Wear dry, hole-free gloves

to insulate hands.

5.b. Insulate yourself from work and ground using dry

insulation. Make certain the insulation is large

enough to cover your full area of physical contact

with work and ground.

In addition to the normal safety precautions, if

welding must be performed under electrically

hazardous conditions (in damp locations or

while wearing wet clothing; on metal structures

such as floors, gratings or scaffolds; when in

cramped positions such as sitting, kneeling or

lying, if there is a high risk of unavoidable or

accidental contact with the workpiece or

ground) use the following equipment:

• Semiautomatic DC Constant Voltage (Wire)

Welder.

• DC Manual (Stick) Welder.

• AC Welder with Reduced Voltage Control.

5.c. In semiautomatic or automatic wire welding, the

electrode, electrode reel, welding head, nozzle or

semiautomatic welding gun are also electrically

“hot”.

5.d. Always be sure the work cable makes a good elec-

trical connection with the metal being welded. The

connection should be as close as possible to the

area being welded.

5.e. Ground the work or metal to be welded to a good

electrical (earth) ground.

5.f. Maintain the electrode holder, work clamp, welding

cable and welding machine in good, safe operating

condition. Replace damaged insulation.

5.g. Never dip the electrode in water for cooling.

5.h. 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.

5.i. When working above floor level, use a safety belt

to protect yourself from a fall should you get a

shock.

5.j. Also see Items 4.c. and 1.

MAR95

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Lincoln Electric Pro-MIG 140 User Manual Page 3

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