V1.0 PROCUT 30A Digi Plus Plasma Cutter 9085754
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5. Do not perform any welding work on containers that held flammable
or toxic substance until they are cleaned by a person trained in
removing toxic and flammable substances and vapours per the
American Welding Standard AWS F4.1.
6. Open a container before performing any welding work on it. The heat
generated by the welding process will cause the air and gases to
expand. The internal pressure may cause a sealed or closed container
to rupture, possibly causing an injury or death.
7. Do not weld pipes or metal that are covered in combustible material
or in contact with combustible structure such as a wall. Only weld if
the covering can be safely removed.
7.1 Follow all safety precautions and legal requirements before
welding a workpiece that contains asbestos or attempting to
remove the asbestos covering. This requires expert knowledge
and equipment.
7.2 Molten slag can run down the inside and outside of a pipe and start
a fire. Be aware where the pipe terminates and take precautions.
8. Do not weld a panel that is a sandwich construction of combustible
and metal materials.
9. Have a fire extinguisher available for immediate use. A dry chemical fire
extinguisher for Types A, B and C is suggested.
9.1 Welding a combustible metal like zinc, magnesium or titanium
requires a Type D fire extinguisher.
9.2 Do not use liquid-based fire extinguishing methods near the
electric arc plasma cutting machine, as it may cause a
shock hazard.
10. Ventilation systems should be positioned so sparks or molten slag
isn’t carried to an adjacent area.
11. Have a Fire Watcher observing areas outside of the welder’s view,
such as the opposite side of a wall or behind the welder. A fire may
also start on the other side of a structure that could not be removed.
The Fire Watcher will extinguish a fire or raise the alarm to evacuate
if the fire cannot be contained by the extinguishing equipment.
11.1 A fire watch extends at least 30 minutes after the welding is
complete to ensure there are no fires caused by smoldering
sparks or ejected material.
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