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INTRODUCTION
particularly in cases where the general ventilation is poor, or where considerable welding work is anticipated. In
extreme cases where adequate ventilation cannot be provided, supplied air respirators may be necessary.
Gas welding
Oxy-acetylene torches may be used for welding and cutting and special care must be taken to prevent leakage of
these gases, with consequent risk of fire and explosion.
The process will produce metal spatter and eye and skin protection is necessary.
The flame is bright and eye protection should be used, but the ultra-violet emission is much less than that from arc
welding, and lighter filters may be used.
The process itself produces few toxic fumes, but such fumes and gases may be produced from coatings on the work,
particularly during cutting away of damaged body parts and inhalation of the fumes should be avoided.
In brazing, toxic fumes may be evolved from the metals in the brazing rod, and a severe hazard may arise if brazing
rods containing cadmium are used. In this event particular care must be taken to avoid inhalation of fumes and expert
advice may be required.
Special precautions must be taken before any welding or cutting takes place on vessels which have contained com-
bustible materials, e.g. boiling or steaming out of fuel tanks.
White spirit
See solvents.
47899733 23/06/2015
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