46，what's the difference between the definition of lng full tank and single tank? doer equipment-k8凯发

what is the difference between the definition of lng full tank and single tank

definition of lng full capacity tank: under normal operation conditions, it is the main evaporation gas container of the tank (this case is applicable to the main container with top opening) and supports the insulation layer of the main container;

in case of leakage of the main container, all the liquid products should be stored and the air tightness of the structure should be maintained. the exhaust can be carried out, but it should be controlled (through the pressure relief system).

the annular space between the main container and the secondary container should not be more than 2m.

difference between single tank and full tank:

1. different materials

material comparison

name	inner tank	insulation layer	outer tank	remarks
single tank	stainless steel	perlite	carbon steel	fully sealed with cofferdam
full tank	stainless steel	perlite	stainless steel	fully sealed

2. there are different ways to deal with the leakage of inner tank

ways to deal with leakage of inner tank

name	ways to deal with leakage of inner tank
single tank	when the inner tank leaks, the outer tank can't stop the leakage, and all the leakage liquid flows into the cofferdam, which will form a large number of steam clouds and form multiple dangerous points after being blown away by the wind, which is not safe enough.
full tank	when the inner tank leaks, the outer tank can reliably keep the leaking liquid, which is equivalent to two-layer closed container, and can orderly discharge and handle, with higher safety.

3. the floor area is different

cofferdams must be built for single tank, which covers a large area. cofferdams are not needed for full tank, and the demand for land is relatively small.

4. the cost is different

because the outer wall of single tank is carbon steel, the cost is relatively low; the outer wall of full tank is made of stainless steel, and the cost is about 1 to 1.5 times that of single tank

5. different application fields

single tank: it is widely used. at present, in the existing performance, most small and medium-sized low-temperature double wall tanks use single tank

full capacity tank: the 10000m3 lng full capacity tank of yuncheng compressed natural gas built by suzhou doer gas chemical equipment co., ltd

6. comprehensive comparison

project	single tank	full tank
area covered	many	less
cofferdam	need	unwanted
security	low	high
technical reliability	high	project
investment cost	0.7	1
operating costs	in	low
construction period	short	long
construction difficulty	easy	hard

lng单容罐_副本2.jpg

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