FHM TRAINING TOOLS
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commitment to creating and keeping safe
►►►
workplaces.
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These materials have been developed based on applicable federal laws and regulations in place at the time the materials were created. The program
is being provided for educational and informational purposes only and does not constitute and is not intended to provide OSHA compliance certification,
regulatory compliance, a substitute for any "hands on“ training required by applicable laws and regulations, or other legal or professional advice or
services. By accessing the materials, you assume all responsibility and risk arising from the use of the content contained therein.
©2010 Grainger Safety Services, Inc.
Compressed Gases
►►►
These materials have been developed based on applicable federal laws and regulations in place at the time the materials were created. The program
is being provided for educational and informational purposes only and does not constitute and is not intended to provide OSHA compliance certification,
regulatory compliance, a substitute for any "hands on“ training required by applicable laws and regulations, or other legal or professional advice or
services. By accessing the materials, you assume all responsibility and risk arising from the use of the content contained therein.
©2010 Grainger Safety Services, Inc.
Learning Objectives
At the conclusion of this presentation, you will:
► Know
types of gases in compressed gas cylinders
► Recognize
► Know
hazards associated with these gases
safe use practices of compressed gases
Agenda
Presentation agenda:
► Information
► Chemical
► Your
on compressed gases and cylinders
and physical hazards
responsibilities
►Section 1
Compressed Gases
and Cylinders
Information
Compressed Gas Cylinders
Standard portable industrial gas cylinder:
► Stores
► 57in
gases at high pressures
tall, 9in diameter
► One-quarter
► About
► 330
inch thickness
155lbs in weight when filled
cubic ft of gas at 2640 lbs per square inch
Four Types of Compressed Gases
Substance types in gas cylinders:
► Gas
at standard temperature,
increased pressure
► Liquefies
at standard temperature,
increased pressure
► Dissolved
► Liquefies
in a solvent
at reduced temperature,
increased pressure
Gas at STP
Gases at standard temperature:
► Air
► Argon
► Helium
► Nitrogen
► Oxygen
Liquefied Gases
Liquefied gases at standard temperature:
► Butane
► Propane
► Carbon
dioxide
► Nitrous
oxide
Dissolved Gases
Gases dissolved in a solvent at
standard temperature:
► Acetylene
Cryogenic Gases
Liquefied gases at reduced temperature:
► Liquid
nitrogen
► Liquid
oxygen
► Carbon
dioxide
Hazards of Compressed Gas Systems
Hazards of use, storage, and handling of cylinders:
► Chemical
hazards:
–Associated with cylinder contents
► Physical
hazards:
–Due to presence of a high pressure vessel
►Section 2
Chemical Hazards
Chemical Hazards
Chemical hazards of compressed gases:
► Flammable
► Corrosive
► Explosive
► Poisonous
► Inert
► Acidic
► Reactive
Labeling and Material Safety Data Sheets
Labeling and MSDS practices:
► Cylinders
may be stenciled or stamped
► Three-part
tag systems
► Cylinder
color-coding is unreliable
► Periodic
inspections
► All
gases to be included in:
– Hazard communication
chemical inventory
– Material Safety Data Sheets
Segregation
Compressed gases should be segregated from:
►
High traffic areas
►
Oil and grease
►
Flames, sparks, heat, or ignition
►
Electrical circuits
Cylinders should be protected from:
►
Ground
►
Direct sunlight
►
Dampness
►
Salt and other corrosives
Fire Protection
Cylinders containing flammable gases should be:
► Separated
from cylinders containing oxidizing gas:
– 20 feet
– 5 foot fire-resistant barrier
► Stored
► Use
in a well-ventilated space
flow restrictors or surge protectors
Cylinder Leaks
Leak detection procedures:
► For
flammable gas – soapy water solution
► Temperatures
at or below freezing use 50%
glycerin-water
► For
toxic/corrosive gas – test with inert gas
► Establish
emergency procedures
Engineering Controls
Common engineering controls:
► Emergency
► Gas
► Flow
shutoff switch
cylinder cabinets
restrictors
► Emergency
eyewash
►Section 3
Physical Hazards
Physical Hazards
Container may rupture due to:
► Forklift
puncture
► Knocked
over
Ruptured tanks
► May
become projectiles
► Release
► Turn
toxic gas into the atmosphere
the environment flammable
Securing Cylinders
Gas cylinders must be secured at all times:
► In
a vertical position
► Secured
at 2/3 of it’s height with:
– Chain, plastic coated wire cable, or straps
► Secured
individually
Transporting Cylinders
Rules for transporting:
► Never
drag, slide, or roll a cylinder
► Always
► Never
have valve cap on
transport with regulator in place
► Ensure
it’s secured to cart
► Do
not drop or strike against objects
► Do
not lift by valve cover
► Do
not use ropes or slings
Cylinder Testing
Test information marked on cylinder:
► Hydrostatic
and burst testing are most common
► Hydrostatic
or ultrasonic testing is required every
5 - 10 years
1.
2.
3.
4.
5.
6.
7.
8.
DOT Specifications – Material or
Construction
Serial Number
Registered Owner
Date of Manufacture and original hydrostatic
test
Neck Ring – Current Owner
Retest Markings
Barcode
Cylinder Manufacturers Marking
TW = Tare Weight
Valve Connections
Cylinder attachments:
► Cap
over valve to protect it
► Some
cylinders have a protective frame
► Pressure
regulator:
– Pressure gauge
– Flow adjustment
Gas Lines and Piping
Guidelines:
► All
gas lines should be labeled
► Hoses
should be examined
► Avoid
unnecessarily long hoses
► Keep
hoses free of kinks
► Keep
hoses away from high
traffic areas
► Repair
► One
leaks promptly
hose per type of gas
The Regulator
Precautions:
► Make
sure correct regulator is equipped
► Inspect
regulator and cylinder
► Never
use grease or oil
► Valve
handle should be easily accessible
► Use
proper tools for valves
► Check
► Fire
MSDS
extinguishers
► Valve
outlet facing away
Cylinder Storage
Storage area should be:
► Away
from heat and ignition sources
► Designated
► Marked
“no smoking”
as gas storage
► Restricted
► Provided
access
with appropriate equipment
Cylinder Storage (continued)
Gas containers should be:
► Capped,
stood upright, and properly secured
► Segregated
according to categories
► Segregated
according to full or empty
► Manage
so oldest is used first
► Periodically
checked for condition
Empty Cylinders
Proper procedure:
► Considered
► Labeled
full until identified as empty by user
“M T” or tagged when empty
► Empty
cylinders are returned to supplier
► Leave
25 psig minimum pressure
► Do
not leave empty cylinders
attached to pressurized system
►Section 4
Your
Responsibilities
Your Responsibilities
Your responsibilities include:
► Knowing
content of cylinders used
► Regulator,
► Following
► Knowing
valve, and hose maintenance
rules for storage, transportation, and use
what to do in an emergency
Additional Information
Compressed Gas Safety: General Safety Guidelines,
Montana Department of Labor and Industry
Air Products Safety Grams
http://www.airproducts.com/index.asp
Compressed Gas Association (CGA)
www.cganet.com
Compressed Gases Self Inspection
Checklist, National Institute for
Occupational Safety and Health (NIOSH)
Safety Checklist Program for Schools