The issue of installing pressure gauges in the insulation layer of LNG storage tanks
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I have a question: Clause 5.3.5 of standard GB51156 requires that when there is no connection between the inner tank and the gas space within the insulation layer, a differential pressure gauge should be installed or a pressure gauge should be placed in the insulation layer. What is the reason for this? If a differential pressure gauge or pressure gauge is installed, is it still necessary to set up high-pressure alarms and interlocks? What needs to be linked, and how should the alarm and linkage values be determined?
Why are differential pressure gauges and pressure gauges installed? What is the impact of the insulation layer pressure?
Our storage tanks do indeed have pressure difference gauges for the inner tank and the bottom insulation layer, equipped with an H alarm