1. Compressed Gases

2. Compressed gas description
Definition of a compressed gas – any gas, or mixture of gases, that is pressurized and contained in a cylinder or tank. 1a

3. Compressed gas description
Examples of compressed gases
acetylene
anhydrous ammonia
carbon dioxide
helium
Types of containers in which compressed gas is stored 1b

4. Cryogenic liquids
Definition of a cryogenic liquid - matter that exists at minus 200 degrees Celsius
Examples of cryogenic liquids
liquid nitrogen
liquid argon
liquid oxygen 2a

5. Handling and inspection procedures
Ensure gas containers are identified with a DOT or TC label
Cylinders must never be dropped, slid, or rolled 3a

6. Handling and inspection procedures
Use carts or other material handling equipment to move cylinders
Regulators, pressure relief devices, valves, and hoses must be designed for the specific container 3b

7. Handling and inspection procedures
Never interchange equipment between different types of gases
Pressure relief devices maintain pressure in cylinder at a desired level 3c

8. Handling and inspection procedures
Inspect cylinders and devices, and remove defective equipment from service
Inspect threads on valves and regulators for damage, dirt, grease, and oil 3d

9. Handling and inspection procedures
Threads on regulators and auxiliary equipment must match the container valve threads - adapters are not allowed
Connections must not be tampered with, or forced together 3e

10. Handling and inspection procedures
Valves should be opened slowly, with valve outlets pointed away from the user and other persons
Valves should be opened with the wrench supplied by the vendor 3f

11. Handling and inspection procedures
Valves should not be hammered open or closed 3g

12. Storage procedures Containers must be stored upright
Storage areas must be well-ventilated
Avoid storage temperatures above 125 degrees Fahrenheit 4a

13. Storage procedures Post the names of the gases in the storage area
Keep valve caps on containers when not connected to dispensing equipment 4b

14. Storage procedures
Keep compressed gases away from fires, flames, and welding torches 4c

15. Storage procedures When containers are in storage, remove: regulators
cylinder connections
hose lines
similar auxiliary devices 4d

16. Storage procedures
Store oxygen away from flammable gas containers and combustibles
20-foot rule
non-combustible 5-foot high barrier 4e

17. Storage procedures Ensure that the storage area is:
properly labeled
secure
away from ignition sources
separate from oxidizing gases
Types of containers in which cryogenics are stored 4f

18. Compressed gas hazards
Inert gases
Oxidizing gases
Fire hazards of flammable compressed gases 5a

19. Compressed gas hazards
Health hazards of poison gases
Corrosive gases
Other hazards 5b

20. Cryogenic liquid hazards
Extreme cold temperatures
Asphyxiation
Splashing and boiling during transfer 6a

21. Personal protective equipment
Eye and face protection
Gloves
Aprons
Foot protection 7a