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Pure oxygen storage tanks are not ordinary containers; they hold high-concentration oxygen, and the slightest carelessness can lead to serious consequences. Today, we will delve deeply into this device that may seem ordinary but actually hides many complexities. From material selection to daily maintenance, as well as fire safety requirements, we will give you a comprehensive understanding of the proper way to handle this \"dangerous\" device. Material selection for pure oxygen storage tanks: Stainless steel is the preferred material for such tanks, especially 316L stainless steel. This material boasts excellent corrosion resistance and mechanical strength, enabling it to withstand the erosion of high-concentration oxygen over long periods of time. Aluminum storage tanks are also a common choice; they are lightweight and do not generate sparks easily, but their pressure resistance is relatively low. Copper and copper alloys are also used in certain special applications, as they do not react violently with oxygen. It should be noted, however, that carbon steel must never be used, as it rusts very easily in a pure oxygen environment, and the rust particles produced can act as ignition sources. The inner walls of the tank must undergo special treatment; typically, electrolytic polishing or chemical passivation is used to ensure that the surface is smooth and free of burrs. Any minor surface defect can become a safety hazard, as irregularities on the metal surface are prone to generating hot spots in an environment of pure oxygen. Design considerations and routine maintenance: When designing pure oxygen storage tanks, the pressure rating is the primary factor to consider. The tank must be able to withstand more than 1.5 times the working pressure, and be equipped with a reliable pressure relief device. All connecting components should use metal seals, as rubber or plastic seals will age rapidly in pure oxygen. Valve selection is particularly crucial; specially designed oxygen valves must be used. Ordinary valves may ignite due to sufficient heat generated by friction when operated in a pure oxygen environment. A check valve should be installed at the tank outlet to prevent oxygen from flowing back and causing danger. In daily maintenance, regular inspections are essential. Conduct a visual inspection at least once per month to check for corrosion, deformation, or mechanical damage. Internal cleaning must be carried out at least once a year, using specialized solvents; any residual grease represents a potential hazard. Maintenance personnel must wear anti-static work clothes, and tools must also be made explosion-proof. Stress tests are conducted every three years to ensure the integrity of the storage tanks. It must be thoroughly dried after testing, as moisture accelerates metal corrosion. All maintenance records should be kept in detail, as they serve as an important basis for safety management. Fire safety cannot be ignored; the fire separation distances in the oxygen storage tank area must be strictly complied with according to the regulations. Storage tanks should be placed away from open flames, high-temperature equipment, and flammable materials, with a minimum safety distance of usually not less than 15 meters. The storage area should have clear no-fire signs and be equipped with specialized fire extinguishing equipment. Static electricity protection is a key aspect of fire prevention. All pipes and storage tanks must be reliably grounded, with a grounding resistance of no more than 10 ohms. Operators must wear conductive shoes or anti-static shoes to prevent the accumulation of static electricity. The flow rate during tank filling must be strictly controlled, as too fast airflow can generate static electricity sparks. A leak emergency response plan is essential. Once a leak is detected, the gas supply must be cut off first, and the valve should be closed using copper tools. The use of electronic devices such as mobile phones or walkie-talkies is strictly prohibited, as electrical sparks could ignite high-concentration oxygen. When evacuating, move against the wind to avoid being downwind of the oxygen cloud. Fire-fighting facilities must be specifically installed. Conventional water-based fire extinguishers are ineffective against fires involving pure oxygen; dry powder or carbon dioxide fire extinguishers should be used instead. However, it should be noted that these fire extinguishers can only put out fires in their early stages; large-scale oxygen fires require the intervention of professional firefighting forces. The safety management of pure oxygen storage tanks is a systems engineering task; every aspect, from material selection and design to daily operations, must be handled with care. Only by strictly adhering to the guidelines can we ensure that this \"dangerous element\" is used to our advantage without causing harm. Remember, in the presence of pure oxygen, any carelessness can have severe consequences.