Clarke MIG220TE, Инструкция по эксплуатации и обслуживанию

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C) Fire and explosion prevention
Causes of fire and explosion are:
1) combustibles reached by the arc, flame, flying sparks, hot slag or heated material;
2) misuse of compressed gases and cylinders
3) short circuits.
BE AWARE that flying sparks or falling slag can pass through cracks, along pipes, through
windows or doors, and through wall or floor openings, out of sight of the goggled operator.
To prevent fires and explosion: keep equipment clean and operable, free of oil, grease, and (in
electrical parts) of metallic particles that can cause short circuits. If combustibles are in area, do
NOT weld. Move the work if practicable, to an area free of combustibles.
Avoid working in paint spray rooms, dip tanks, storage areas, ventilators. If the work cannot be
moved, move combustibles away from sparks and heat; or protect against ignition with suitable
fire- resistant covers or shields.
Walls, ceilings, and floor near work should be protected by heat resistant covers or shields. Fire
watcher must be standing by with suitable fire extinguishing equipment during and for some time
after welding or cutting if:
a) appreciable combustibles (including building construction) are within 10m.
b) appreciable combustibles are further than 10m, but can be ignited by sparks.
c) openings (concealed or visible) in floors or walls can expose combustibles to sparks.
d) combustibles adjacent to walls, ceilings, roofs or metal partitions can be ignited by
radiant or conducted heat.
After work, check that area is free of sparks, glowing embers, and flames. An empty container
that held combustibles, or that can produce 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.
ELECTRIC ARC (MIG, TIG) WELDING
Comply with precautions in above, 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 and work pieces are hot. The wise operator avoids unnecessary risks and protects
himself and others from accidents.