What are the safety precautions for using high-purity helium gas?

Helium, high-purity helium

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When using high-purity helium gas, the principle of first in, first out must be followed. Suitable handcarts must be used to move containers. Do not pull, roll or push the cylinder. Do not attempt to lift the cylinder head by grasping it; Ensure that the gas cylinder remains in a solid state throughout the entire usage process. To safely release gas from gas cylinders, pressure reducing valves or independent control valves should be used, and one-way valves should be used to prevent backflow; Do not heat the cylinder to increase pressure and emissions. If the user has difficulty operating the gas cylinder valve, it must be stopped from use; Use an adjustable wrench to open the valve cover that is covered or rusted. Do not place tools (such as wrenches, screwdrivers, pry bars, etc.) into the valve cover, otherwise it will damage the valve and cause leakage; High purity helium gas is compatible with all commonly used materials, and the design of pipelines and equipment must meet pressure requirements. Helium is non-toxic, but it can suffocate by replacing oxygen in the air. Long term inhalation of oxygenated air<10% can lead to brain tissue damage or death. The initial symptoms include nausea, vomiting, and asthma. People exposed to this air cannot help themselves or seek help. Inhaling pure helium can cause immediate loss of consciousness and almost immediate death. If a large amount of gaseous helium or liquid helium is used, it should be done in a well ventilated area to avoid the formation of oxygen deficient air.