HSE Professionals _ Compressed Gas Safety

7/24/2019 HSE Professionals _ Compressed Gas Safety

1/15

Occupational Health & Safety Professionals

HSE Professionals

Home Contact Us Working at Height Hand and Power Tool Safety Abrasive Wheels Colour Coding System Heat Stress

Hot Work Work Permit Hazardous Substances Handling Fire Prevention & Protection Lifting Safety

Scaffolding Safe ty Ele ctrica l Safe ty Confine d Spa ce s Fall Prote ction

Compressed Gas Safety

Thousands of products are available which contain gases and mixtures of gases stored under

pressure in cylinders. Most of these gases are classified as "compressed gases" according to WHMIS

technical criteria. The Controlled Products Regulations contain details of these criteria.

There are three major groups of compressed gases stored in cylinders: liquefied, non-liquefied and

dissolved gases. In each case, the pressure of the gas in the cylinder is commonly given in units of

kilopascals (kPa) or pounds per square inch gauge (psig).

Gauge pressure = Total gas pressure inside cylinder - atmospheric pressure

Atmospheric pressure is normally about 101.4 kPa (14.7 psi). Note that compressed gas cylinder

with a pressure gauge reading of 0 kPa or 0 psig is not really empty. It still contains gas atatmospheric pressure.

Liquefied gases are gases which can become liquids at normal temperatures when they are inside

cylinders under pressure. They exist inside the cylinder in a liquid-vapour balance or equilibrium.

Initially the cylinder is almost full of liquid, and gas fills the space above the liquid. As gas is

removed from the cylinder, enough liquid evaporates to replace it, keeping the pressure in the

cylinder constant. Anhydrous ammonia, chlorine, propane, nitrous oxide and carbon dioxide are

examples of liquefied gases.

Non-liquefied gases are also known as compressed, pressurized or permanent gases. These gases do

not become liquid when they are compressed at normal temperatures, even at very high pressures.

Common examples of these are oxygen, nitrogen, helium and argon.

Acetylene is the only common dissolved gas. Acetylene is chemically very unstable. Even at

atmospheric pressure, acetylene gas can explode. Nevertheless, acetylene is routinely stored and

used safely in cylinders at high pressures (up to 250 psig at 21C).

This is possible because acetylene cylinders are fully packed with an inert, porous filler. The filler is

saturated with acetone or other suitable solvent. When acetylene gas is added to the cylinder, the

gas dissolves in the acetone. Acetylene in solution is stable.

What are compressed gases?

What are the three major groups of compressed gases?

Liquefied Gases

Non-Liquefied Gases

Dissolved Gases

HSE Professionals

Select Language

Powered by Translate

Translate

Topics

Emergency Planning

Home

Toolbox Talk

Fall Protection and

Prevention

Though it's obvious that

anyone who works high

above the ground runs

the risk of falling, a surprising number

of workers seem to think...

Self ContainedBreathing Apparatus

(SCBA )VideoTraining

SELF CONTAINED

BREATHING

APPARATUS (SCBA) Video Training

Poor Housekeeping

Can Cause Accident

Good housekeeping

can prevent a large

part of the yards

Popular Posts

Professionals : Compressed Gas Safety http://hseprofessionals.blogspot.in/p/compressed-gas-safet

5 8/11/2015


2/15

accidents. For this reason,

good housekeeping is and will always

continue to. ..

Noise (Hearing

Protection)

How Does the Ear

Work? The ear

consists of three basic

parts - the outer ear, the middle ear,

and the inner ear. Each part of the

ear ...

Excavation Safety

Procedure

Excavation Any

man-made cut, tr ench,

or depression in an

earth surface, formed by earth

removal. Benching: ...

Excavator use & Safety

Precaution.

Excavators are used:-

Digging of trenches,

holes, foundations

Material handling Brush cutting with

hydraulic attachmen...

H2S (Hydrogen Sulfide)

Training

H 2 S is a colorless,flammable gas that can

be naturally present in

most fossil fuels. It occurs as a

byproduct of t he production and

pro...

Confined Space

TeamworkConfined Space

Teamwork The epitome

of Confined Space

Entry The attached Pictures show a

crew accomplishing their Assigned

tasks on ...

Scaffolding Safety

Toolbox Talk

Scaffolds are intended

to provide safe working

positions at elevations.

But if we will not observe the basic

safety guidelines in the u...

Abrasive Cutting &

Grinding

The following basic

rules shall be observed

when using abrasive

wheel grinding machines: Operation

of a grinder is considered a hot...

Be the first of your friends to like this

Anemometer

Confined Space

CPR

Cutting & Grinding

Emergency Planning

Environmental Hygiene

Excavation

Excavator Safety

Fall Protection

Fire Stages & types

Gas Tester

H2S Training

List of Topics


5 8/11/2015


3/15

Hepatitis Prevention

Hierarchy of Control

Home

Housekeeping

Noise(Hearing Protection)

Safe Work Habits

SCBA Training

Slings

Toolbox Talk

2014 (29)

January (16)

JOB SAFETY

ANALYSIS (JSA)

How to Prepare

Fire Stages & Fire

Types?

Environmental Hygiene

Awareness..

EMERGENCY

MANAGEMENT

EMERGENCY

MEDICAL

EVACUATION

Emergency Planning

Cardiopulmonary

resuscitation (CPR)Training Video...

Hierarchy of control.

Short Circuit in

Electrical Panel

Incident:

Poor Housekeeping Can

Cause Accident

What is a Material

Safety Data Sheet

(MSDS)?

First Aid Complete

Training.

Abrasive Cutting &

Grinding

How do you Suffer in

Hepatitis A, B, C andprevent...

Your hands Safety

Wheelbarrows Safety

Precautions

February (10)

March (3)

Blog Archive

Currency Converter

From

To

SAR

3.7499

Rates Nov 8, 2015 GMT

Currency Converter

Share with Your Friends

169ShareShare

ShareShare


5 8/11/2015


4/15


5 8/11/2015


5/15


5 8/11/2015


6/15


5 8/11/2015


7/15


5 8/11/2015


8/15


5 8/11/2015


9/15


5 8/11/2015


10/15


15 8/11/2015


11/15


15 8/11/2015


12/15


15 8/11/2015


13/15


15 8/11/2015


14/15


15 8/11/2015


15/15

Home


Documents

HSE Professionals _ Compressed Gas Safety