Characteristics
Compressed gas cylinders are pressurized vessels designed to store gases at high pressure. Because of this internal pressure, damage to a cylinder, such as dropping or tipping it over, can result in sudden, uncontrolled release of contents and forceful movement of the cylinder. In addition to the physical hazards associated with pressurization, further risks may arise depending on the properties of the gas, including toxicity, flammability, corrosivity, or chemical reactivity.
Laboratory Chemicals
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argon
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butane
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carbon monoxide
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chlorine
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ethylene
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hydrogen
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methane
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nitrogen
Non-Laboratory Chemicals
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acetylene
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compressed air
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oxygen
Storage Precautions for Compressed Gases
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Segregate incompatible gases as you would other incompatible chemicals. Flammable and oxidizing gases should be separated by a minimum of 20 feet or a non-combustible barrier.
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Limit the quantity of compressed gas cylinders on site to what will be used within a reasonable period of time.
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Store cylinders upright.
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Secure cylinders so they will not fall during an earthquake.
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An acceptable means includes using two non-combustible restraints, such as chains, one restraint located approximately one-third of the cylinder length from the top, and the other restraint one-third from the bottom.
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Keep cylinders away from heat and open flames.
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Leave the valve protection cap on the cylinder unless it is in use.
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Never store cylinders in walk-in freezers. The confined space with no ventilation poses a potential hazard.
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If you suspect that a cylinder is leaking, do not attempt to sniff the leak out. Apply a soap solution to the cylinder and locate the leak by noting where the bubbles appear.
Toxic gases, highly toxic gases, and pyrophoric gases must be managed in accordance with the campus Toxic, Corrosive and Pyrophoric (TCP)Gas Program requirements. Contact toxicgas@berkeley.edu for details about ventilation and quantity limitations.