What is a relay tank?
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According to Article 3.0.1 of the \"Code for Design of Oil Depots\" GB50074-2014, which deals with the classification of oil depot grades, the capacities of zero-level tanks, transfer tanks, and vent tanks are not included in the total capacity of the oil depot when calculating it. What exactly are transfer tanks, and is there a clear definition for them? For example, can a bilge cleaning or line cleaning tank be considered a relay tank? It would be great if you could provide an example!
Truly, they are very sparing with words – without even clarifying one noun, another new one is introduced. What am I supposed to do?
That is, when the material is unloaded from the tank truck into the storage area, it is first placed in a transfer tank, and then from there it is transferred to the main storage tanks. It is generally used when the volume of the storage tank is larger than that of the tank truck. This way, it is possible to determine whether the materials in the tank truck have been completely unloaded. That’s what I remember it to be.
The function you mentioned is the zero-position tank; it seems that the zero-position tank and the relay tank are the same thing? !
{:3_63:} After checking carefully, there are relay tanks, elevated tanks, and zero-level tanks for discharging the material from the tank trucks into the intermediate tanks in the tank farm. The process is similar in all cases: first, the material is unloaded from the tank truck into an intermediate tank, and then transferred from that intermediate tank to the storage tanks in the tank farm. However, the main function of the zero-position tank is to prevent the discharge pump from running dry, while the elevated tank (also known as a relay tank) is used to transfer materials to the storage tanks in the tank farm; the relay tank sometimes serves to settle out impurities. That’s what the information I’ve gathered plus my understanding is. It may not be complete or contain errors; please feel free to correct them!
I believe that the mixing tanks in long-distance pipelines should also not be included in the tank capacity; in my view, mixing tanks are considered to be relay tanks as well.
I understand that the long-distance pipelines located in the blending tanks of the oil depot are not included in the total storage capacity of the depot