What is the typical pressure control for the secondary tank of LNG mother and daughter tanks?
Thread Content
What is the typical pressure control for the secondary tank of LNG mother and daughter tanks?
The design pressure of LNG mother and daughter tanks is generally below 1.6 MPa
It depends on the way of storage; in all cases I’ve seen, it’s around 3 kilograms.
The sub-vats usually weigh 6 to 7 kilograms, though there are also those that weigh 3 to 4 kilograms
Generally, the liquid pressure coming from the liquefaction units is quite similar; the operating pressure is usually around 3 kg, while the design pressure range is relatively wide, typically falling between 4 kg and 6 kg.
When the pressure is high, the wall thickness increases and costs rise; when the pressure is low, the amount of BOG increases. The pressure in the liquefaction plant is determined through calculations. For the receiving station, it is generally necessary to achieve a pressure of 6 kilograms or more, at least on par with the pressure in the tank truck; otherwise, a BOG compressor needs to be added
Generally, the pressure for speaking is kept between 0.2–1.0 MPa