Lincoln Electric D350 Series Safety Instruction For Use And Maintenance page 10

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Specific case of chlorine solvents in welding: (used for cleaning or degreasing).
— The fumes from these solvents can be changed into toxic gases when subjected to arc radiation, including from
a distance.
— Such solvents may therefore not be used in locations where electric arcs occur, if the solvents are not in a
sealed enclosure.
Work in confined spaces
Examples :
— Mine roads
— Piping and pipelines
— Ship docks, pits, manholes, cellars
— Tanks
— Ballast tanks
— Silos
— Reactors
Special precautions must be taken before undertaking welding operations in such enclosures, where suffocating
and poisoning and fire and explosion risks are very great.
A work permit procedure setting out all the safety measures must systematically be set up.
Make sure that ventilation is appropriate, paying special attention to:
— under-oxygenation
— over-oxygenation
— excess fuel gas
FIXED FANS
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