Presentation on theme: "Liquid Nitrogen and Cryogenics Training Program"— Presentation transcript:
1Liquid Nitrogen and Cryogenics Training Program Prepared by: Kathryn Billings
2Potential Hazards Health: Vapors may cause dizziness or asphyxiation without warning.Vapors from liquefied gas are initially heavier than air and spread along ground.Contact with gas or liquefied gas may cause burns, severe injury, and/or frostbite.
3Public SafetyImmediately call emergency personnel in the event of a large spill or leak.9-1-1 from campus phone or for ISUPD dispatcherIsolate large spills or leaks for at least 100 meters in all directions.Keep unauthorized personnel away.Stay upwind.Keep out of low areas.Ventilate closed spaces before entering.
4Container Requirements Closed container with a loose fitting top that allows venting.Use only vessels designed for extreme cold (i.e. insulated).Vessel must have carrying handles or be on wheels.
5Potential Hazards Explosion: Liquid Nitrogen must be transported and stored in an appropriate container containing pressure relief devices.Otherwise, when the pressure builds up,the stopper could be "rocketed out"or worse, the container could explode
6Appropriate Containers Examples of acceptable cryogenic Dewar's:
7Inappropriate Containers DO NOT use open, un-insulated or glass containers!
8Liquid Nitrogen Tank Located off loading dock at Science Lab Building Key can be checked out at the Chemistry storeroom.Enter through South East gate.Valve Location
9Liquid Nitrogen TankDo NOT touch any of the valves on the North side of the tank.Do NOT enter through the North gate.DO NOT touch!
10Protective ClothingAlways wear thermal protective clothing when handling refrigerated/cryogenic liquids or solids.It is required you wear a full face shield over safety glasses, loose fitting gauntlet gloves, long sleeve shirts, full-length trousers without cuffs, and fully enclosed shoes.
11Fill HoseThe liquid Nitrogen is released through this hose.
12Procedures: Step 1: Fill Hose Insert and hold the fill hose into the appropriate container or into the funnel.
13Procedures: Step 2: Open/Close Valve Open valve slowly to begin filling.Close valve tightly after filling.Valve
14Safe Handling Wear Personal Protective Equipment: Face GuardGlovesAlways use liquid Nitrogen in a well ventilated area.Use a loose-fitting stopper or lid that allows venting of the boil off.If using a funnel, use caution not to overfill the container.
15Safe Handling Continued Only transport liquid nitrogen in the freight elevator with no other occupants present.Only use containers that have been designed specifically for cryogenic liquids.Do not store in a confined space.Do not store at temperatures above 125°F.
16References Emergency Response Guide 2004 Harvard University Praxair