The issue of no local level indication for the high-pressure tank
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The high-pressure tanks (both hot and cold high-pressure tanks) are not equipped with local level gauges; instead, there are only 4 sets of remote-operated double-flange level gauges, one of which is used for controlling the liquid level, while the other three are used for three-out-of-two interlock functions. Without an on-site level gauge, how can the actual true liquid level be determined in practical operation?
Can’t we choose a control gauge? One that is just for controlling this a bit
A level gauge without a design for on-site indication has no practical value; you can roughly determine the liquid level height by considering the upper and lower installation positions of the double-flange level gauge. Our cold high-pressure section is equipped with on-site level gauges, while the hot high-pressure section does not have them; however, the protective measures are in place, so there’s no need to worry about safety issues.
Some design institutes prioritize safety in their designs, and the on-site liquid level displays pose safety risks; we don’t have such issues with heat-high levels, but they do exist with cold-high levels
How about using a float level gauge? The float level gauge is installed in the middle of the cold high-pressure head
High-temperature and high-pressure thermal fractionators generally do not have on-site level gauges (the level gauges used in our fractionators are radioactive types), while cold fractionalators equipped with on-site level gauges use float-type gauges, which do not allow determination of the actual liquid level.
If the actual liquid level height cannot be seen, how can one determine the true liquid level? With only remote-transmission gauges, such as those with double flanges, is it possible to estimate it based on density alone?
Yes, it is the nuclear level gauge that is used to measure density; nowadays, many applications involving high pressure and high temperature do not have on-site level gauges.
It’s still better to do it; the original design density and the actual density may differ significantly, especially regarding the boundaries. There is also no safety risk associated with the magnetic flip switches being separated from the medium