Methods of loading liquid nitrogen, liquid oxygen, and liquid argon from air separation plants
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Seeking advice: What method is used for loading liquid nitrogen, liquid oxygen, and liquid argon into air separation units? Domestic standards and specifications do not specify clearly what design approach should be used Is it necessary to install loading swivels?
It’s sufficient to use a metal hose specifically designed for liquid oxygen for the connection. There are quick connectors, as well as some filling facilities on the tank. No design is needed, right? It is recommended that you share your detailed requirements so that we can determine if there are any special needs for the filling process, for reference.
According to the petrochemical industry regulations, for Category B liquids that require loading via loading nozzles, there are no clear specifications regarding liquid nitrogen and liquid argon. I’m not sure whether other regulations provide any guidelines on the loading of these substances. Additionally, in addition to quick connectors, breakaway valves and control valves are also necessary. There might also be an automatic control system such as a gauge box; it’s probably not just a simple metal hose.
I’m not sure what your loading and unloading volume is; this is the usual procedure for transportation by road tankers. You might as well pay a visit to your local gas station to find out; this is for reference only.
GB50030 - 2013: Code for Design of Oxygen Stations, which sets out relevant requirements
Normal units that have their own vehicles are equipped with specialized oxygen, nitrogen, and argon gas hoses, along with corresponding connectors, to prevent accidental operation by personnel. During loading, interlocks based on the weight indicated by the scale, pipeline pressure, and tank pressure are in place to prevent overcharging. Third-party vehicles use swivel joints and metal hoses for connections. Generally, the upper valve is used for filling before loading to prevent overpressure in the tank.
I couldn’t find any requirements in the oxygen station specifications