Lincoln Electric K2704-3, K2704-2 manual Cause fire or explosion, For Electrically, Iii

iii

SAFETY

iii

WELDING and CUTTING

CYLINDER may explode

SPARKS can

if damaged.

gas

cylinders

cause fire or explosion.

7.a. Use

only

compressed

6.a. Remove fire hazards from the welding area.

containing the correct shielding gas for the

If this is not possible, cover them to prevent

process used and properly operating

Remember

the welding sparks from starting a fire.

regulators designed for the gas and

that

welding

sparks

and

hot

pressure used. All hoses, fittings, etc. should be suitable for

materials from welding can easily go through small cracks

the application and maintained in good condition.

and openings to adjacent areas. Avoid welding near

securely

hydraulic lines. Have a fire extinguisher readily available.

7.b. Always keep cylinders in

an upright

position

6.b. Where compressed gases are to be used at the job site,

chained to an undercarriage or fixed support.

special precautions should be used to prevent hazardous

7.c. Cylinders should be located:

situations. Refer to “Safety in Welding and Cutting” (ANSI

• Away from areas where they may be struck or subjected to

Standard Z49.1) and the operating information for the

physical damage.

equipment being used.

• A safe distance from arc welding or cutting operations and

6.c. When not welding, make certain no part of the electrode

any other source of heat, sparks, or flame.

circuit is touching the work or ground. Accidental contact can

cause overheating and create a fire hazard.

7.d. Never allow the electrode,

electrode holder or any other

6.d. Do not heat, cut or weld tanks, drums or containers until the

electrically “hot” parts to touch a cylinder.

proper steps have been taken to insure that such procedures

7.e. Keep your head and face away from the cylinder valve outlet

will not cause flammable or toxic vapors from substances

when opening the cylinder valve.

inside. They can cause an explosion even though they have

7.f.

been “cleaned”. For information, purchase “Recommended

Valve protection caps should always be in place and hand

Safe Practices for the Preparation for Welding and Cutting of

tight except when the cylinder is in use or connected for

Containers and Piping That Have Held Hazardous

use.

Substances”, AWS F4.1 from the American Welding Society

compressed gas

(see address above).

7.g. Read and follow the instructions on

6.e. Vent hollow castings or containers before heating, cutting or

cylinders, associated equipment, and CGA publication P-l,

“Precautions for Safe Handling of Compressed Gases in

6.f.

welding. They may explode.

Cylinders,” available from the Compressed Gas Association

Sparks and spatter are thrown from the welding arc. Wear oil

1235 Jefferson Davis Highway, Arlington, VA 22202.

ear plugs when welding out of position or in confined places.

FOR ELECTRICALLY

free protective garments such as leather gloves, heavy shirt,

cuffless trousers, high shoes and a cap over your hair. Wear

powered equipment.

Always wear safety glasses with side shields when in a

welding area.

8.a. Turn off input power using the disconnect

6.g. Connect the work cable to the work as close to the welding

switch at the fuse box before working on

area as practical. Work cables connected to the building

the equipment.

framework or other locations away from the welding area

8.b. Install equipment in

accordance with the U.S.

National

increase the possibility of the welding current passing

through lifting chains, crane cables or other alternate circuits.

Electrical Code, all local codes and the manufacturerʼs

This can create fire hazards or overheat lifting chains or

recommendations.

cables until they fail.

8.c. Ground the equipment in accordance with the U.S. National

6.h. Also see item 1.c.

Electrical Code and the manufacturerʼs recommendations.

6.I.

Read and follow NFPA 51B “ Standard for Fire Prevention

During Welding, Cutting and Other Hot Work”, available from

NFPA, 1 Batterymarch Park, PO box 9101, Quincy, Ma

6.j.

022690-9101.

Do not use a welding power source for pipe thawing.

Refer to http://www.lincolnelectric.com/safety for additional safety information.

Jan ʻ09