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Compressed Gases

Learn about the safe storage and handling of compressed gases and cryogenic liquids. Understand proper inspection, storage, and handling procedures to prevent hazards and ensure workplace safety.

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Compressed Gases

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  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 • 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 • Hoselines • 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

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