Electric Arc Welding Hazard/Risk

Electric Arc Welding

Welding

The process of joining of metals either by electrical or by gas is called welding. 

 Electric Arc Welding Hazard/Risk

·                     Injury (Burn) due to spark.

·                     Fire due to spark.

·                     Unavailability of fire fighting equipment.

·                     Electrocusion.

·                     Incompetent person performing the job.

·                     Inadequate PPE.

  Electric Arc Welding CONTROLS.

·         Proper Personal protective equipment shall be worn to prevent burn. Fire proof blanket shall be used to prevent travel of spark and slag(waste) during welding operation.

·         All combustible material should be removed from the work area.  If it cannot be removed, it should be covered with fireproof material.

·         Fire extinguisher shall be available on site during welding operation.

·         
Equipment shall be properly grounded to cut off fault current. All welding cables and returns shall be inspected and free of any cracks and damaged. Welding operation in wet surface is not acceptable.

·          Metal bucket to be provided for containment of spent electrode.

·          Only certified and experienced person shall do the welding job.

·          Appropriate PPE such as welding gloves , aprons and long sleeves, face shield shall be worn at all times during welding operation.

Electric Arc Welding

precautions for welding

1. Remove all combustion material from the place of welding
2. Clear the work area and cover wooden floor with fire proof mats. ( Welding mechanic should be kept with in the visibility of the welders.
3. Erect fire resistance screen around the work
4. All welding cables should be fully insulted
5. All welding mics shall be double earthed
6. Welding area should be dry and free from water
7. Keep the fire extinguisher / sand really
8. Use leather hand gloves, goggles and helmets
9. Switch off the power when welding is stopped
10. Do not allow the helper to do welding
11. Do not shift he welding cable unless the electric power is switched off.
12. Do not allow the helper to carry the welding. Terminal of the welding cables should be provided 3-cable with lugs and kept tight.
13. Oxygen hose in black and Acetylene hose in red in color as per standard
14. NRV of the blow torches should be maintained properly avoid back fire
15. Welders should be trained properly
16. Cylinders should be stored in a cold dry place away bottom heat and direct sunlight.
17. Proper house keeping, good ventilation in the working area
18. Smoking should be avoided from welding area
19. Hose connection should be proper made
20. Barricade the work area and put a sign board
21. Rolling of cylinders should be avoided
22. Flash back arrestor should be attached in each cylinders
23. Any leakage of cylinder should be kept separately

Radiography .

It is conducted to check the welding joints for any blow holes defects through x-ray.
Control measures of radiography.
Barricade the area
Remove all un-necessary persons away from site
Check radiation level with dosimeter
Use lead shields
Put a sign board
Risk tissue damaged
Use special filter glass
Use lead coated aprons

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