- What is welding?
- The process of joining of metals either by electrical or by gas is called welding.
- What are the hazards in welding?
- Eye injury
- Burn injury Arc realization
- Electrical shock Light arc radiation
- Heat, light and radiation effect Heat fume
- Poisonous gases Chipped price of weld metal
- Fire
- Explosion Scattering
- Noise Sparking
- Sparking
- Flying sand
- What are the pre cautions for welding?
- Remove all combustion material from the place of welding
- Clear the work area and cover wooden floor with fire proof mats. (Welding mechanic should be kept within the visibility of the welders.)
- Erect fire resistance screen around the work
- All welding cables should be fully insulted
- All welding machine shall be double earthed
- 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. Terminal of the welding cables should be provided 3-cable 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 avoid back fire
- Welders should be trained properly
- Cylinders should be stored in a cold dry place away bottom heat and direct sunlight.
- Proper housekeeping, good ventilation in the working area
- Smoking should be avoided from welding area
- Hose connection should be proper made
- Barricade the work area and put a sign board
- Rolling of cylinders should be avoided
- Flash back arrestor should be attached in each cylinders.
- What is the precaution for gas cutting?
- Keep fire extinguisher nearby
- Keep fire watch near by
- Remove all combustible from work area
- Use all necessary PPE
- Never put welding gas cylinder inside a confined space
- Hoses shall not be laid in path ways
- Gas cutting torch should have flash back arrestors
- Gas test to be done to check for presence of flammable gas in site.
- Good housekeeping and ventilation necessary in working area.
- Hose connections should be made properly
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