Yes, belongs to the pressure vessel
Oxygen cylinders are used to assist in the treatment of respiratory diseases caused by lack of oxygen (asthma, bronchitis, pulmonary heart disease, etc.), cardiac and cerebrovascular system diseases (coronary heart disease, myocardial infarction, cerebral hemorrhage, cerebral infarction) of the oxygen supply equipment, mainly used in hospitals, first-aid stations, sanatoriums, home care, field rescue, personal health care and a variety of oxygen-deficient environment.
The standard for the storage capacity of oxygen cylinders is the pressure resistance. The upper pressure limit of conventional oxygen cylinders is 15Mp (megapascals) which translates to 147 atmospheres. The test value of pressure resistance is 22.5Mp. The pressure inside the regular filled cylinder should be around 12~15Mp. The gas in the cylinder can not be completely exhausted, should be retained not less than 0.05MP residual pressure.
Oxygen cylinders should be kept at a distance of not less than 10 meters from open flames, not close to heat sources, and not exposed to sunlight. It should be stored in a dry and cool place, and the cylinder should not be impacted.
Oxygen cylinder nozzle, inhaler, pressure gauge, and interface threads are strictly prohibited to be stained with grease. Oxygen cylinders in the transportation and loading and unloading, to close the valve, tighten the cap, gently move and put, no collision slippery roll, throw and fall.
Please pay attention to the protection of the cylinder and the valve during the moving, parking and using process of the oxygen supplier, and prevent the cylinder from tipping over, so as not to cause damage to the accessories. If leakage is found during use, please close the cylinder valve immediately. Please do not repair by yourself.
It is strictly prohibited to privately disassemble the oxygen cylinder valve, valve switch, pressure gauge and other parts on the valve. Users are strictly prohibited from filling oxygen privately. Oxygen cylinder filling pressure shall not exceed the prescribed pressure, overfilling is strictly prohibited; cylinder inspection every three years, qualified before continuing to use, inspection in the filling unit.
Oxygen in the liquid and solid state is blue, so the oxygen cylinder body painted blue paint, but the oxygen cylinder oxygen is in the form of high-pressure gas and not liquid oxygen.
References
Oxygen cylinders:/item/%E6%B0%A7%E6%B0%94%E7%93%B6/1125652?fr=aladdin