Low-temperature storage tanks pose potential hazards such as leaks, overpressure, and explosions when in operation. If hidden dangers prior to these incidents are not timely detected and addressed, severe accidents can ensue. Therefore, establishing and rigorously implementing a comprehensive inspection system is crucial for ensuring the safe operation of low-temperature storage tanks.
During operation, low-temperature storage tanks pose potential hazards such as leaks, overpressure, and explosions. If hidden dangers before these incidents are not discovered and addressed promptly, severe accidents may occur. Therefore, establishing and strictly implementing a comprehensive inspection system is crucial for ensuring the safe operation of low-temperature storage tanks. Daily inspections of low-temperature storage tanks primarily include the following:
1. Are there any leaks in the valves and piping, and is there any frosting or sweating on the casing?
2. Are all valves in normal open/close status?
3. Are the instruments (level gauges, pressure gauges) functioning properly, and do the DCS display parameters match the field primary gauges?
4. Is the storage tank pressure normal? When the pressure approaches or equals the maximum pressure, the vent valve should be opened to relieve pressure.
5. Is the liquid fill rate over 95%?
6. Is the seal gas normal for atmospheric pressure powder insulation tanks? (50mmH2O)
7. No flammable or explosive materials, as well as any debris, are permitted within proximity of the liquid oxygen storage tank, with clear signage in place.
8. No smoking or open flame near the liquid oxygen storage tank.
9. Test the acetylene and total hydrocarbon content in the liquid oxygen storage tank at least once a week. The acetylene content must not exceed the process specifications; if it does, liquid oxygen must be discharged and replaced promptly for treatment.
10. Is the liquid oxygen storage tank properly grounded?
11. Ensure there is a certain amount of liquid inside the tank if it will not be unused for an extended period, to avoid spending a lengthy time refilling and replacing the tank upon recooling.
12. Are the legs damaged, is the foundation sinking, tilting, or cracked, the condition of the fastening bolts, and any deformation of the tank.
13. Regularly check the vacuum level of the storage tank.
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