Compress Gas Handling
Type of Compressed Gas
Stored in gas form inside the cylinder. e.g.
=>Oxygen, hydrogen, nitrogen, helium.
Store in liquid form inside the cylinder e.g.
=>Carbon dioxide, sulfur hexafloride.
Dissolve in other solvent. e.g.
Why Compressed Gas Is Hazardous ?
High pressure inside the cylinder.
The gas inside the cylinder may be:
=>Flammable / Explosive.
=>Toxic / Corrosive.
The cylinder is also hazardous itself
Handling of compressed gas:
A: Prevent the accident caused by the pressure inside the cylinder
l. Use suitable gas regulation.
You have to know:
Pressure. (Cylinder / Working)
Condition of the equipment.
2. Proper installation of gas regulator:
Check cylinder connection.
(Cylinder outlet / Regulator adaptor)
Clean the cylinder valve.
Tighten the fitting with suitable tools.
Test for Leakage Before Use.
B: Prevent the accident caused by the gas.
Understanding the gas inside the cylinder.
Make sure the gas is the one you want.
Check the label / Color of the cylinder.
Never use the gas without proper labeling on the cylinder.
Get information about the gas properties.
C: Prevent the accident caused by the cylinder.
Since the cylinder is very heavy so :
1. When you need to relocate the cylinder, you must
Use specially designed tools--- cylinder trolley.
Never roll the cylinder.
Always shut the valve before moving.
2. To prevent falling, use
specially designed tools to hold the cylinder on its place.
Safety operating procedure
1. Goods receiving:
Check the gas is the one you wanted.
Check the sealing on the cylinder outlet.
Check the cylinder valve.
Check the label / Cert. on the cylinder.
2. Moving- the cylinder to using point.
Use cylinder trolley to transport the cylinder.
Use cylinder belt / rack to hold the cylinder
3. Using Area
Arranged so as to minimize fire risk.
Provided with appropriate safety and emergency equipment. e.g.
4. Using the gas.
Use suitable tools to fit the regulator.
Clean the cylinder valve outlet and regulator inlet.
Close the regulator before opening the valve.
Use proper key to open the cylinder valve slowly.
If the valve was damaged, never attempt to take gas from that cylinder.
5. Storage of cylinder.
Keep the cylinder on a clean tidy area
Keep the cylinder away form fire.
Store gas by its type. Leave at least 3 meter for the flammable gas and oxygen.
Full cylinder and empty cylinder should be kept in different place.
Never smoke inside the compressed gas stores.
Cryogenic Liquid Handling
Types of cryogenic liquid
Why Cryogenic Liquid is Hazardous
Cryogenic liquid is extremely cold. (Cold burn)
Very small amounts of liquid can convert into very
large amount of gases. (Asphyxiation)
Precaution when using cryogenic liquid.
1. Preventing cold burn
Face shield or safety goggles.
Thermal insulated glove.
Handle with care
2. Preventing asphyxiation.
Transporting cryogenic liquid containers.
Use proper transportation means:
Roller base (For dewar)
Trolley (For LGC)
Always put your PPE on even if your won't contact the liquid.
Transferring cryogenic liquid nitrogen.
Use proper withdraw device or dewar tipper.
Use phase separator.
Use gaseous nitrogen as pressure source.
Transfer at low pressure, usually less than 5 psig.
Always put your PPE on even your won't contact the liquid.
Treatment on Cold Burn
The following are recommended:
Untight covering clothing.
Do not rub frozen parts.
Wash with warm water.
Cover frozen parts with dry sterile clothing.
No alcohol or cigarette for patient.
Warm drink and food may be helpful.
Medical assistance should be obtained as soon as possible.
Treatment on Asphyxiation
=>Slow down of physical and mental response.
=>Rapid and gasping breathing.
=>Collapse of incapacity to move.
=> Remove patient to open air.
=> Artificial respiration if necessary.