Safety in Gas CuttingSafety in Gas Cutting..

To be Known………To be Known………Know the Gas cutting Sets.Know the Gas cutting Sets.Hazards & Precautions Hazards & Precautions Risk Assessment. Risk Assessment.

Safety in Gas CuttingSafety in Gas Cutting Know the Gas cutting set.Know the Gas cutting set.

Flash Back Arrestor

Cylinder contents & outlet pressure gauges.

Pressure Gauge.

Valve guard

Valve

Cylinder key.

Nozzle.Blow pipe.Flash back arrestors.

Flexible Hose, Acetylene-RED

Flexible Hose, Oxygen -Blue

Safety in Gas CuttingSafety in Gas Cutting..

Hazards.Hazards.Fire/explosion.Fire/explosion.Lighted Blow pipe (Torch)Lighted Blow pipe (Torch)Leakage of Gas.Leakage of Gas.Back Fire and Flash Back.Back Fire and Flash Back.

Safety in Gas CuttingSafety in Gas Cutting Fire/Explosion;Fire/Explosion;

This may cause by;This may cause by;Careless handling of a lighted blow pipe Careless handling of a lighted blow pipe

(torch) resulting burns to users or others.(torch) resulting burns to users or others.Using the torch close to the combustible Using the torch close to the combustible

materials.materials.Cutting of tanks or drums, which containing Cutting of tanks or drums, which containing

flammable materials.flammable materials.Gas leaking from hoses, valves and other Gas leaking from hoses, valves and other

equipments.equipments.Back fires and Flash backs.Back fires and Flash backs.

Safety in Gas CuttingSafety in Gas Cutting.. Prevention of FirePrevention of Fire.. Move the work pieces to a safe location for carrying out Move the work pieces to a safe location for carrying out

the hot work process.the hot work process. Remove all combustible materials such as; wood, paper, Remove all combustible materials such as; wood, paper,

plastic etc;plastic etc; Protect all combustible materials that cannot be moved Protect all combustible materials that cannot be moved

from close contact with flame, heat, spark or hot slag.from close contact with flame, heat, spark or hot slag. Use suitable guards or cover metal sheeting or fire Use suitable guards or cover metal sheeting or fire

retardant blanketretardant blanket

Safety in Gas CuttingSafety in Gas Cutting..

Maintain a continuous fire watch during the Maintain a continuous fire watch during the period of Hot work.period of Hot work.

Keep adequate fire preventive measures like Keep adequate fire preventive measures like as; Fire Extinguishers, Fire bucket with sand as; Fire Extinguishers, Fire bucket with sand & water.& water.

Safety in Gas CuttingSafety in Gas Cutting.. Lighted Blow pipes (Torch)Lighted Blow pipes (Torch)A A lighted torch is a very dangerous piece of lighted torch is a very dangerous piece of

these equipment. They may also injure these equipment. They may also injure other peoples and set flammable materials other peoples and set flammable materials on fire.on fire.

Preventive measures;Preventive measures; Work in a safe location away from other Work in a safe location away from other

people.people. Shut off the torches and cylinders when not Shut off the torches and cylinders when not

in use. Don’t leave a lighted torch on a in use. Don’t leave a lighted torch on a platforms or floors. platforms or floors.

Clamp the work piece do not hold it by Clamp the work piece do not hold it by hand.hand.

Keep hoses away from the working area to Keep hoses away from the working area to prevent contact with flames, heat, sparks or prevent contact with flames, heat, sparks or heat splatters.heat splatters.

Wear all PPE’S; specially protective Wear all PPE’S; specially protective clothing's and eye protection.clothing's and eye protection.

Safety in Gas CuttingSafety in Gas Cutting.. Leakage of Gases.Leakage of Gases.Gas leaks are often the result of damaged or poorly Gas leaks are often the result of damaged or poorly

maintained gas control equipments, hoses, torches maintained gas control equipments, hoses, torches and valves poor connections and not closing valves and valves poor connections and not closing valves after use.after use.

Prevention of gas leakages.Prevention of gas leakages.Keep hoses clear of sharp edges and abrasive Keep hoses clear of sharp edges and abrasive

surfaces or vehicle can run over them.surfaces or vehicle can run over them.Do not allow hot metals or spatters to fall on hosesDo not allow hot metals or spatters to fall on hosesHandle cylinders carefully. Keep them in an upright Handle cylinders carefully. Keep them in an upright

position and fasten them to prevent them from position and fasten them to prevent them from falling or being knocked over. E.g.: chain them in falling or being knocked over. E.g.: chain them in wheeled trolley or against a wall or rigid structure.wheeled trolley or against a wall or rigid structure.

Safety in Gas CuttingSafety in Gas Cutting..Always turn the gas supply off at the cylinder when Always turn the gas supply off at the cylinder when

the job is finished.the job is finished.Maintain all equipment and keep in good condition.Maintain all equipment and keep in good condition.Regularly check all connections and equipments for Regularly check all connections and equipments for

faults and leaks, with the help of soap solution..faults and leaks, with the help of soap solution..

Safety in Gas CuttingSafety in Gas Cutting.. Never placed the gas cutting sets near by the area of Never placed the gas cutting sets near by the area of

grinding, welding etc;grinding, welding etc; Never placed the gas cutting sets on the below area where Never placed the gas cutting sets on the below area where

ever the hot work is going on at height.ever the hot work is going on at height. keep wet gunny bags on the cylinder valves and ensure that keep wet gunny bags on the cylinder valves and ensure that

it is wet in all times.it is wet in all times. Keep Fire bucket containing water near the gas cutting Keep Fire bucket containing water near the gas cutting

cylinders, It will help for maintain the gunny bag wet.cylinders, It will help for maintain the gunny bag wet.

Safety in Gas CuttingSafety in Gas Cutting.. Back fire and Flash back.Back fire and Flash back.

What is back fire?What is back fire?A back fire is when the flame burns back in to the A back fire is when the flame burns back in to the

blow pipe (torch) often with a sharp bang.blow pipe (torch) often with a sharp bang. How it happens?How it happens?

When the torch is held too close to the work piece.When the torch is held too close to the work piece. If the nozzle is blocked or partially blocked.If the nozzle is blocked or partially blocked. To be know if the back fire does occurs….To be know if the back fire does occurs….Shut off the torch valves, oxygen first and then fuel Shut off the torch valves, oxygen first and then fuel

gas.gas.Shut off the oxygen and fuel gas cylinder valves.Shut off the oxygen and fuel gas cylinder valves.Cool the torch with water, if necessary.Cool the torch with water, if necessary.Check the equipment for damage or faults, Check the equipment for damage or faults,

particularly the nozzle.particularly the nozzle.

Safety in Gas CuttingSafety in Gas Cutting..

Flash backs.Flash backs.

Flash backs are commonly caused by a Flash backs are commonly caused by a reverse flow of oxygen in to the fuel gas reverse flow of oxygen in to the fuel gas hose (or fuel in to the oxygen hose) and hose (or fuel in to the oxygen hose) and producing a explosive mixture in the hose. producing a explosive mixture in the hose. The flame can then burn back through the The flame can then burn back through the torch, in to the hose and may even reach the torch, in to the hose and may even reach the pressure regulator and the cylinder.pressure regulator and the cylinder.

Safety in Gas CuttingSafety in Gas Cutting.. How to prevent the flash backs?How to prevent the flash backs? Use correct lightening up procedures. Purge the hoses before Use correct lightening up procedures. Purge the hoses before

lightening the torch to remove any potentially explosive gas lightening the torch to remove any potentially explosive gas mixtures . mixtures .

Use a spark igniter and ignite the gas quickly after turning it on.Use a spark igniter and ignite the gas quickly after turning it on. Ensure that the flash back arrestors is fitted with both ends Ensure that the flash back arrestors is fitted with both ends

(cylinder side and torch side).(cylinder side and torch side). Use the correct gas pressures and nozzles for the job.Use the correct gas pressures and nozzles for the job. Maintain the equipment in good condition.Maintain the equipment in good condition.

Safety in Gas CuttingSafety in Gas Cutting.. If a Flash back does our;If a Flash back does our;

Immediately close the cylinder valves, both the Immediately close the cylinder valves, both the fuel gas and oxygen , if it is safe to do so.fuel gas and oxygen , if it is safe to do so.

If the fie cannot be put out at once, evacuate the If the fie cannot be put out at once, evacuate the area and call the emergency fire services.area and call the emergency fire services.

The torches, hoses, regulators, flash back The torches, hoses, regulators, flash back arrestors may have been damaged, check it’s arrestors may have been damaged, check it’s carefully and replace if necessary before reuse.carefully and replace if necessary before reuse.

Safety in Gas CuttingSafety in Gas Cutting.. Risk Assessment.Risk Assessment.

Before using gas cutting equipment a careful Before using gas cutting equipment a careful assessment of risk should be carried out.assessment of risk should be carried out.

Permit to work and Job safety analysis.Permit to work and Job safety analysis.Companies operate a written permit system and job Companies operate a written permit system and job safety analysis for hot work. The permit and JSA details safety analysis for hot work. The permit and JSA details the work to be carried out, how and when it is to be the work to be carried out, how and when it is to be done, and precautions to be taken. It is likely to result in done, and precautions to be taken. It is likely to result in a higher standard of care and supervision.a higher standard of care and supervision.

Safety in Gas CuttingSafety in Gas Cutting..Training.Training.

No one should operate the gas cutting sets unless No one should operate the gas cutting sets unless they have received adequate training in;they have received adequate training in;

Safe use of the equipment.Safe use of the equipment.Precautions to be taken.Precautions to be taken.Use of fire extinguishers.Use of fire extinguishers.Means of escape when raising the fire alarm.Means of escape when raising the fire alarm.