WARNING
FUMES AND GASES can be hazardous to your
health.
Welding produces fumes and gases. Breathing
these fumes and gases can be hazardous to your
health.
1. Keep your head out of the fumes. Do not breathe the
fumes.
2. If inside, ventilate the area and/or use exhaust at the arc to
remove welding fumes and gases.
3. If ventilation is poor, use an approved air-supplied
respirator.
4. Read the Material Safety Data Sheets (MSDSs) and the
manufacturer’s instruction for metals, consumables,
coatings, and cleaners.
5. Work in a confined space only if it is well ventilated, or while
wearing an air-supplied respirator. Shielding gases used for
welding can displace air causing injury or death. Be sure the
breathing air is safe.
6. Do not weld in locations near degreasing, cleaning, or
spraying operations. The heat and rays of the arc can react
with vapours to form highly toxic and irritating gases.
7. Do not weld on coated metals, such as galvanized, lead, or
cadmium plated steel, unless the coating is removed from
the weld area, the area is well ventilated, and if necessary,
while wearing an air-supplied respirator. The coatings and any
metals containing these elements can give off toxic fumes if
welded.
WARNING
WELDING can cause fire or explosion.
Sparks and spatter fly off from the welding arc.
The flying sparks and hot metal, weld spatter, hot
workpiece, and hot equipment can cause fires and
burns. Accidental contact of electrode or welding
wire to metal objects can cause sparks, overheating,
or fire.
1. Protect yourself and others from flying sparks and hot
metal.
2. Do not weld where flying sparks can strike flammable
material.
3. Remove all flammables within 35’ (10.7m) of the welding
arc. If this is not possible, tightly cover them with approved
covers.
4. Be alert that welding sparks and hot materials from welding
can easily go through small cracks and openings to adjacent
areas.
5. Watch for fire, and keep a fire extinguisher nearby.
6. Be aware that welding on a ceiling, floor, bulkhead, or partition
can cause fire on the hidden side.
7. Do not weld on closed containers such as tanks or drums.
8. Connect work cable to the work as close to the welding area
as practical to prevent welding current from travelling long,
possibly unknown paths and causing electric shock and fire
hazards.
9. Do not use welder to thaw frozen pipes.
Eye protection filter shade selector for welding or cutting (goggles or helmet), from AWS/ANSI Z49.1:1999
Welding or Cutting
Operation
Electrode Size Metal Thickness
or Welding Current
Filter
Shade No.
Welding or Cutting
Operation
Electrode Size Metal Thickness
or Welding Current
Filter
Shade No.
Torch Soldering All 2 Gas Tungsten Arc Welding
Torch Brazing All 3 or 4 Light Under 50 Amp
10
Oxygen Cutting Medium
50 to 150 Amp 12
Light Under 1" (25mm) 3 or 4 Heavy
150 to 500 Amp 14
Medium 1" – 6" (25mm – 150mm) 4 or 5 Atomic Hydrogen Welding
All 12
Heavy Over 6" (150mm) 5 or 6 Carbon Arc Welding
All 14
Gas Welding Carbon Arc Gouging
Light Under 1/8 " (3mm) 4 or 5 Light 12
Medium 1/8" – 1/2" (3mm – 12mm) 5 or 6 Heavy 14
Heavy Over 1/2" (12mm) 6 or 8 Plasma Arc Welding
Shielded Metal-Arc Welding (Stick) Electrodes
Light Under 20 Amp 6 to 8
Light Under 5/32" (4mm) 10 Light 20 to 100 Amp 10
Medium
Under 5/32" - ¼" (4mm - 6.4mm)
12
Medium 100 to 400 Amp 12
Heavy
Over ¼" (6.4mm)
14
Heavy 400 to 800 Amp 14
Gas Metal Arc Welding Plasma Arc Cutting
Light Under 60 Amp 7 Light Under 300 Amp 9
Light
60 to 160 Amp 11 Medium 300 to 400 Amp 12
Medium
160 to 250 Amp 12 Heavy 400 to 800 Amp 14
Heavy
250 to 500 Amp 14
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