SAFETY IN GAS CUTTING AND WELDING

SAFETY IN GAS CUTTING AND WELDING

ACETYLENE CYLINDERS:

  • Maroon in colour.
  • Acetylene gas (C2H2) is dissolved in acetone (liquid) and stored at 250 psi, in a specially designed cylinder.
  • Acetylene cylinders has a volume of 8.5 m3.

OXYGEN CYLINDER:-

  • Oxygen is a colorless, tasteless, and odorless gas and is slightly heavier than air.
  • Oxygen cylinder is black in colour.
  • Oxygen stored at 2200 psi.
  • Oxygen cylinders has a volume of 6.9 m3.

CYLINDER STORAGE:-

  • Well ventilated room.
  •  No open flame in the store.
  • 10 m distance from oxygen and acetylene cylinders.
  • No materials that are prone spontaneous combustion.
  • Should not be stored in direct sunlight.

Regulators:-

UNLOADING FROM TRUCK:-

  • Never drop.
  • Use wooden Ramp and coir matters (50cm thick).
  • Keep the top of the cylinder up.
  •  Roll the cylinder keeping it upright.

Lifting cylinders by crane:-

  • Use of cradle.
  • 4-leg bridle sling.
  • D-shackle and lifting lug.

Use of Cylinder trolley:-

  • Shifting cylinders at site.
  • Avoid Rolling & Manual carrying.
  • Use trolley.

RIGHT OPERATION:-



  • Keep the cylinder upright and away from hot jobs.
  • Fix the DA and oxygen regulator to the respective cylinders    after ensuring free from dirt or grease.
  • Connect the cutting hoses to the regulators and cutogen with hose clamps.Blue or black hoses for oxygen and red for DA.
  • Open the cylinder and check for leakage by soap water test     at the joints.The same to be followed for the oxygen     cylinder.Close the  cylinders .
  • Purge the oxygen line and then the DA line one after the other and close the valves.
  • Open the DA regulator,the torch valve and light the gas. Then open the oxygen valves to the required pressure.
  • After cutting start closing from oxygen and then DA.

HAZARDS:-

FLASH BACK.

BACK FIRE.

GENERAL FIRE.

EXPLOSION.

FIRE ON CYLINDER:-

  • try to put out the fire.
  • close the valve if it gets put out.
  • otherwise inform fire dept. and keep on cooling the cylinder with water.
  • never pour water on hot .

EXPLOSION:-

Reasons:

  • Fire on cylinder (pouring water on hot cylinder).
  • Cylinder exposed to external heat.
  • Rough handling.

PPE FOR SAFETY IN GAS CUTTING AND WELDING

  • Helmets with face shields.
  • Black glass – din value 4 to 5.
  • Leather gloves.
  • Leather apron.
  • Safety shoes.

SAFETY IN WELDING:-

  • The body of the welding machine should  be earth.
  • The terminals of the welding cables should be provided with lugs and kept tight.
  • The joints in the cables should be made with terminals, kept tight and well insulated with heat resistant tape.
  • The cable should be free from joints at-least for a length of three meters from electrode holder to avoid shock hazard.
  • Other electrical cables should not be kept laid with welding cables, to avoid insulation damage.
  • For the return lead only proper cable should be used. Using rods, angles, channels etc. Should be avoided.
  • Never change electrode with bare hands or wet gloves, when standing on wet floors.

HAZARDS:-

  • Fire
  • Shock
  • Health hazards

HEALTH HAZARDS:-

  • Exposure to various toxic gases generated during welding may produce one or more of the following effects:
  • Inflammation of the lungs (chemical phenmonitis)
  • Pulmonary edema (swelling and accumulation of fluids)
  • Chronic bronchitis.
  • Asphyxiation.

Preventive Measures 



  • Elimination or substitution.
  • Modification of the process or  engineering.
  • Local exhaust ventilation.
  • General dilution ventilation.
  • Personal protective equipment,

Personal Protective  Equipment:-

  • FACE SHIELD WITH ATTACHED HELMET
  • GOGGLES, FACE-SHIELD.
  • DIN VALUE OF BLACK GLASS 12 to 14 .
  • LEATHER HAND GLOVES (FLAME RESISTANT)
  • LEATHER APRON & LEG GUARD.
  • SAFETY SHOE.

HAZARDS AT SITE:-

  • Working overhead.
  • Working in confined spaces.
  • Welding or cutting tanks or vessels.
  • Tripping hazards.

 

Saurabh Ranjan is Founder of rlshumancare.com. I have dedicated & committed to publishing some innovative content and useful topics regarding Health, Safety & Environment, which will help and awareness to people for daily life. Also trying to continually improve my content for better awareness and suit to dedicated people.

11 thoughts on “SAFETY IN GAS CUTTING AND WELDING”

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