SAFETY
6.c.
6.e.
6.f.
6.h.
6.1
WELDING and CUTTING
SPARKS can
cause fire or explosion.
6 a. Remove fire hazards from the weld
ing area. If this is not possible, 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 adja-
cent areas. Avoid welding near hydraulic lines. Have a
fire extinguisher readily available
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 in-
formation for the equipment being used.
When not welding, make certain no part Of the elec
trode circuit is touching the work or ground. Accidental
contact can cause overheating and create a fire haz
ard
Do not heat, cut or weld tanks, drums or containers un
til the proper steps have been taken to insure that
such procedures will not cause flammable or toxic va
pors from substances inside. They can cause an ex
plosion even though they have been "cleaned". For in
formation, purchase "Recommended Safe Practices
for the Preparation for Welding and Cutting of Contain
ers and Piping That Have Held Hazardous Sub
stances", AWS F4.1 from the American Welding Soci-
ety (see address above)
Vent hollow castings or containers before heating, cut
ting or welding They may explode
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
Connect the work cable to the work as close to the
welding area as practical Work cables connected to
the building framework or other locations away from
the welding area increase the possibility of the welding
current passing through lifting chains, crane cables or
Other alternate circuits. This can create fire hazards or
overheat lifting chains or cables until they fail.
Also see item 1 c
Read and follow NFPA 51B "Standard for Fire Preven
tion During Welding, Cutting and Other Hot Work",
available from NFPA, 1 Batterymarch Park, PO box
9101 , Quincy, Ma 022690-9101
Do not use a welding power source for pipe thawing.
7b.
8b
CYLINDER may explode
if damaged.
7 a Use only compressed gas cylinders
containing the correct shielding gas
for the process used and properly op
erating regulators designed for the
gas and pressure used All hoses, fittings, etc should
be suitable for the application and maintained in good
condition
Always keep cylinders in an upright position securely
chained to an undercarriage or fixed support.
Cylinders should be located:
• way from areas where they may be struck or sub
jected to physical damage
• A safe distance from arc welding or cutting opera-
tions and any Other source Of heat, sparks, or flame
Never allow the electrode, electrode holder or any
Other electrically "hot" parts to touch a cylinder.
Keep your head and face away from the cylinder valve
outlet when opening the cylinder valve
Valve protection caps should always be in place and
hand tight except when the cylinder is in use or Con-
nected for use
Read and follow the instructions on compressed gas
cylinders, associated equipment, and CGA publication
P-l, "Precautions for Safe Handling Of Compressed
Gases in Cylinders," available from the Compressed
Gas Association 1235 Jefferson Davis Highway,
Arlington, VA 22202
FOR ELECTRICALLY
powered equipment.
8.a. Install equipment in accordance with
the U S National Electrical Code, all
local codes and the manufacturer's
recommendations
Ground the equipment in accordance with the U.S. Na-
tional Electrical Code and the manufacturer's recom
mendations
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