Specifications

8
flammable or toxic vapours when heated, must never be welded on or cut,
unless container has first been cleaned. This includes.......a thorough steam or
caustic cleaning (or a solvent or water washing, depending on the
combustible’s solubility) followed by purging and inerting with nitrogen or
carbon dioxide, and using protective equipment.
Water filling just below working level may substitute for inerting.
A container with unknown contents should be cleaned (see paragraph
above), do NOT depend on sense of smell or sight to determine if it is safe to
weld or cut.
Hollow castings or containers must be vented before welding or cutting - they
can explode.
In explosive atmospheres, never weld or cut where the air may contain
flammable dust, gas, or liquid vapours.
2. ELECTRIC ARC (MIG, TIG) WELDING
Comply with precautions in 1, and this section. Arc welding, properly done, is a
safe process, but a careless operator invites trouble. The equipment carries
high currents at significant voltages. The arc is very bright and hot. Sparks fly,
fumes rise, ultraviolet and infrared energy radiates, weldments are hot. The
wise operator avoids unnecessary risks and protects himself and others from
accidents.
2A) BURN PROTECTION
Comply with precautions in 2. The welding arc is intense and visibly bright. Its
radiation can damage eyes, penetrate lightweight clothing, reflect from light
coloured surfaces, and burn the skin and eyes. Skin burns resemble acute
sunburn, those from gas - shielded arcs are more severe and painful.
DON’T GET BURNED! COMPLY WITH PRECAUTIONS!
1) PROTECTIVE CLOTHING
Wear long sleeved clothing (particularly for gas shielded arc) in addition to
gloves, hat and shoes (2A). As necessary, use additional protective clothing
such as leather jacket or sleeves, flameproof apron, and fire-resistant leggings.
Avoid outer garments of untreated cotton. Bare skin protection. Wear dark
substantial clothing. Button collar to protect chest and neck and button
pockets to prevent entry of sparks.
2) EYE AND HEAD PROTECTION
Protect eyes from exposure to arc. NEVER look at an electric arc without
protection. Welding helmet or shield containing a filter plate shade no. 12 or
denser must be used when welding. Place over face before striking arc.
Protect filter plate with a clear cover plate. Cracked or broken helmet or
shield should NOT be worn; radiation can pass through to cause burns.
Cracked, broken, or loose filter plates must be replaced IMMEDIATELY.
Replace clear cover plate when broken, pitted, or spattered. WE SUGGEST