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How to Check for Problems with Cryogenic Tank?

Jun. 20, 2019

In the face of low temperature storage Cryogenic Tank problems, we do not know how to solve or do not know what problems exist. Today, follow the professional Cryogenic Storage Tank Manufacturer to find out how to check the problems of low temperature storage tanks.


Cryogenic Liquid Storage Tank


Cryogenic Liquid Storage Tank


The main contents of the cryogenic tank are the following points:

①abnormality of cracks, deformation, leakage, local overheating on the outer surface of the cryogenic storage tank; ②whether the safety accessories are complete, sensitive and reliable;

③whether the fastening bolts are intact and all tightened;

④no abnormalities such as sinking, tilting, and damage to the coating.

The external inspection is both the work of the inspector and the daily inspection of the operator. If founding that the safety phenomenon (such as cracks, deformation, severe leakage, etc. of the pressure component), we should be stopped and reported to the relevant personnel in time.


The methods to check Cryogenic Tank:

The main contents of the inspection, in addition to the entire contents of the external inspection, also check the corrosion of the inner and outer surfaces.


①use the naked eye and magnifying glass: check all welds, head transition zone and other stress concentration parts for cracks. If necessary, we need use ultrasonic or radio graphic inspection checks the internal quality of the weld;

②measures the wall thickness. If the measured wall thickness is less than the minimum wall’s thickness of the container, the strength check should be re-examined, and the step-down use or repair measures should be proposed;

③pressure test. Non-destructive testing of all major welds or full weld inspection. However, for containers with low pressure, non-flammable or non-toxic, non-corrosive media, if no defects are found, after obtaining certain experience, non-destructive testing may be performed. The full inspection cycle of the container is generally performed at least once every six years. For qualified containers filled with air and inert gas, the full inspection cycle may be extended after obtaining experience and one or two internal and external inspections to confirm that there is no corrosion.