2. Compressed Gases

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

4. Compressed gas description v Examples of compressed gases AcetyleneAcetylene Anhydrous ammoniaAnhydrous ammonia Carbon dioxideCarbon dioxide HeliumHelium v Types of containers in which compressed gas is stored 1b

5. Cryogenic liquids v Definition of a cryogenic liquid - matter that exists at minus 200 degrees Celsius v Examples of cryogenic liquids Liquid nitrogenLiquid nitrogen ArgonArgon Liquid oxygenLiquid oxygen 2a

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

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

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

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

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

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

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

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

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

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

16. Storage procedures v When containers are in storage, remove: RegulatorsRegulators Cylinder connectionsCylinder connections HoselinesHoselines Similar auxiliary devicesSimilar auxiliary devices 4d

17. Storage procedures v Store oxygen away from flammable gas containers and combustibles 20-foot rule20-foot rule Non-combustible 5-foot high barrierNon-combustible 5-foot high barrier 4e

18. Storage procedures v Ensure that the storage area is: properly labeledproperly labeled securesecure away from ignition sourcesaway from ignition sources separate from oxidizing gasesseparate from oxidizing gases v Types of containers in which cryogenics are stored 4f

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

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

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

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