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HSE : IQA : Welding



  1. What is welding?
    • The process of joining of metals either by electrical or by gas is called welding.
  2. What are the hazards in welding?
    • Eye injury
    • Burn injury Arc realization
    • Electrical shock Light arc radiation
    • Heat, light, and radiation effects Heat fume
    • Poisonous gases Chipped price of weld metal
    • Fire
    • Explosion Scattering
    • Noise Sparking
    • Sparking
    • Flying sand
  3. What are the precautions for welding?
    • Remove all combustion material from the place of welding
    • Clear the work area and cover the wooden floor with fireproof mats. (Welding mechanics should be kept within the visibility of the welders.)
    • Erect a fire resistance screen around the work
    • All welding cables should be fully insulated
    • All welding machines shall be double earthed
    • The welding area should be dry and free from water
    • Keep the fire extinguisher/sand really
    • Use leather hand gloves, goggles, and helmets
    • Switch off the power when welding is stopped
    • Do not allow the helper to do welding
    • Do not shift welding cable unless the electric power is switched off.
    • Do not allow the helper to carry the welding. The terminal of the welding cables should be provided with 3 cables with lugs and kept tight.
    • Oxygen hose in black and acetylene hose in red in color as per standard
    • NRV of the blow torches should be maintained properly to avoid backfire
    • Welders should be trained properly
    • Cylinders should be stored in a cold, dry place away from bottom heat and direct sunlight.
    • Proper housekeeping, good ventilation in the working area
    • Smoking should be avoided in the welding area
    • Hose connection should be properly made
    • Barricade the work area and put up a signboard
    • Rolling of cylinders should be avoided
    • The flashback arrestor should be attached to each cylinder.
  4. What is the precaution for gas cutting?
    • Keep a fire extinguisher nearby
    • Keep a fire watch nearby
    • Remove all combustible from the work area
    • Use all necessary PPE
    • Never put a welding gas cylinder inside a confined space
    • Hoses shall not be laid in path ways
    • Gas cutting torches should have flashback arrestors
    • A gas test is to be done to check for the presence of flammable gas on the site.
    • Good housekeeping and ventilation are necessary in the working area.
    • Hose connections should be made properly

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