Safety In Gas Cutting.

Safety in Gas CuttingSafety in Gas Cutting..
To be Known………To be Known………
Know the Gas cutting Sets.Know the Gas cutting Sets.
Hazards & PrecautionsHazards & 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

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 pipeCareless 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 combustibleUsing the torch close to the combustible
materials.materials.
Cutting of tanks or drums, which containingCutting of tanks or drums, which containing
flammable materials.flammable materials.
Gas leaking from hoses, valves and otherGas leaking from hoses, valves and other
equipments.equipments.
Back fires and Flash backs.Back fires and Flash backs.

 Prevention of FirePrevention of Fire..
 Move the work pieces to a safe location for carrying outMove 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 movedProtect 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 fireUse suitable guards or cover metal sheeting or fire
retardant blanketretardant blanket

Maintain a continuous fire watch during theMaintain a continuous fire watch during the
period of Hot work.period of Hot work.
Keep adequate fire preventive measures likeKeep adequate fire preventive measures like
as; Fire Extinguishers, Fire bucket with sandas; Fire Extinguishers, Fire bucket with sand
& water.& water.

 Lighted Blow pipes (Torch)Lighted Blow pipes (Torch)
AA lighted torch is a very dangerous piece oflighted torch is a very dangerous piece of
these equipment. They may also injurethese equipment. They may also injure
other peoples and set flammable materialsother peoples and set flammable materials
on fire.on fire.
Preventive measures;Preventive measures;
 Work in a safe location away from otherWork in a safe location away from other
people.people.
 Shut off the torches and cylinders when notShut off the torches and cylinders when not
in use. Don’t leave a lighted torch on ain use. Don’t leave a lighted torch on a
platforms or floors.platforms or floors.
 Clamp the work piece do not hold it byClamp the work piece do not hold it by
hand.hand.
 Keep hoses away from the working area toKeep hoses away from the working area to
prevent contact with flames, heat, sparks orprevent contact with flames, heat, sparks or
heat splatters.heat splatters.
 Wear all PPE’S; specially protectiveWear all PPE’S; specially protective
clothing's and eye protection.clothing's and eye protection.

 Leakage of Gases.Leakage of Gases.
Gas leaks are often the result of damaged or poorlyGas leaks are often the result of damaged or poorly
maintained gas control equipments, hoses, torchesmaintained gas control equipments, hoses, torches
and valves poor connections and not closing valvesand 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 abrasiveKeep 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 hoses
Handle cylinders carefully. Keep them in an uprightHandle cylinders carefully. Keep them in an upright
position and fasten them to prevent them fromposition and fasten them to prevent them from
falling or being knocked over. E.g.: chain them infalling 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.

Always turn the gas supply off at the cylinder whenAlways 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 forRegularly check all connections and equipments for
faults and leaks, with the help of soap solution..faults and leaks, with the help of soap solution..

 Never placed the gas cutting sets near by the area ofNever 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 whereNever 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 thatkeep 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 cuttingKeep 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.

 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 theA 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 fuelShut 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.

 Flash backs.Flash backs.
Flash backs are commonly caused by aFlash backs are commonly caused by a
reverse flow of oxygen in to the fuel gasreverse flow of oxygen in to the fuel gas
hose (or fuel in to the oxygen hose) andhose (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 theThe flame can then burn back through the
torch, in to the hose and may even reach thetorch, in to the hose and may even reach the
pressure regulator and the cylinder.pressure regulator and the cylinder.

 How to prevent the flash backs?How to prevent the flash backs?
 Use correct lightening up procedures. Purge the hoses beforeUse correct lightening up procedures. Purge the hoses before
lightening the torch to remove any potentially explosive gaslightening 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 endsEnsure 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.

 If a Flash back does our;If a Flash back does our;
Immediately close the cylinder valves, both theImmediately 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 theIf 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 backThe torches, hoses, regulators, flash back
arrestors may have been damaged, check it’sarrestors may have been damaged, check it’s
carefully and replace if necessary before reuse.carefully and replace if necessary before reuse.

 Risk Assessment.Risk Assessment.
Before using gas cutting equipment a carefulBefore 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 jobCompanies operate a written permit system and job
safety analysis for hot work. The permit and JSA detailssafety analysis for hot work. The permit and JSA details
the work to be carried out, how and when it is to bethe work to be carried out, how and when it is to be
done, and precautions to be taken. It is likely to result indone, 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.

Training.Training.
No one should operate the gas cutting sets unlessNo 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.

Safety In Gas Cutting.

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