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.
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FHM TRAINING TOOLS
This training presentation is part of FHM’s commitment to creating and keeping safe workplaces.
Be sure to check out all the training programs that are specific to your industry.
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.
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Compressed Gases
Learning Objectives
At the conclusion of this presentation, you will:
►Know types of gases in compressed gas cylinders
►Recognize hazards associated with these gases
►Know safe use practices of compressed gases
Agenda
Presentation agenda:
►Information on compressed gases and cylinders
►Chemical and physical hazards
►Your responsibilities
Compressed Gases and Cylinders
Information
►Section 1
Compressed Gas Cylinders
Standard portable industrial gas cylinder:
►Stores gases at high pressures
►57in tall, 9in diameter
►One-quarter inch thickness
►About 155lbs in weight when filled
►330 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 in a solvent
►Liquefies 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
Chemical Hazards
►Section 2
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 in a well-ventilated space
►Use 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 shutoff switch
►Gas cylinder cabinets
►Flow restrictors
►Emergency eyewash
Physical Hazards
►Section 3
Physical Hazards
Container may rupture due to:
►Forklift puncture
►Knocked over
Ruptured tanks
►May become projectiles
►Release toxic gas into the atmosphere
►Turn 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 have valve cap on
►Never 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. DOT Specifications – Material or Construction Serial Number
2. Registered Owner3. Date of Manufacture and original hydrostatic
test4. Neck Ring – Current Owner5. Retest Markings6. Barcode7. Cylinder Manufacturers Marking8. 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 leaks promptly
►One 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 MSDS
►Fire extinguishers
►Valve outlet facing away
Cylinder Storage
Storage area should be:
►Away from heat and ignition sources
►Designated “no smoking”
►Marked as gas storage
►Restricted access
►Provided 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 full until identified as empty by user
►Labeled “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
Your Responsibilities
►Section 4
Your Responsibilities
Your responsibilities include:
►Knowing content of cylinders used
►Regulator, valve, and hose maintenance
►Following rules for storage, transportation, and use
►Knowing 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
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