Regarding whether daily inspection and testing are required for the vacuum jacket of LNG storage tanks
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As the title suggests, is it necessary to measure the vacuum level in the jacket of LNG storage tanks on a daily basis or periodically (through self-inspections)? In our company, we usually conduct routine visual inspections to check for any signs such as moisture formation on the outer walls of the storage tanks, as well as to ensure that there is no abnormal frosting or condensation in the pipelines If there are other criteria, could you please provide them? Thank you~
There is no absolute vacuum; only relative vacuum. If you’re worried, have the manufacturer check the vacuum level.
In my understanding, it should involve conducting vacuum level checks on a regular basis.
Measure the vacuum level regularly. Under normal circumstances, without any special issues, the vacuum level in the jacket can be maintained for several years.
According to the \"Regulations on Safety Technical Inspection of Fixed Pressure Vessels\" TSG21-2016, Chapter 8 on periodic inspections stipulates that the entities using pressure vessels shall conduct annual inspections on such vessels every year. During these annual inspections, the vacuum level can be measured, and whether the vessel can continue to be used can be determined by referring to the requirements for comprehensive inspection of pressure vessels.