What kind of liquid level gauge is best for floating roof tanks?
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My unit is currently using a light guide liquid level meter from Beijing Aerospace. It is not accurate enough for handover measurement and is not stable enough. Please give me some advice.
What are your delivery measurement accuracy requirements?
Our unit has an internal floating roof tank, and the imported guided wave radar level gauge was used with good results. :handshake
Consider a radar level gauge.
Guided wave radar level gauge:handshake
The use of radar can meet the measurement requirements. Now imported radars can be used for measurement in trade settlement.
The floating roof tanks of petroleum storage tanks mostly use radar level gauges.
Is it okay to use a single flange differential pressure transmitter?
Is it okay to install a radar level gauge on a floating roof tank? I seem to think it can only be used for vaulted tanks, because it requires measuring the empty height first and then calculating the actual liquid level.
We have also used light guide liquid level gauges. We have used them for more than a year. Problems often occurred and were abandoned for a period of time. Now they are replaced by radar level gauges.
Immersed liquid level transmitter. I have never tried floating roof tanks. I don’t know if it works. It is economical and affordable.
Floating roof tanks can be equipped with radar level gauges. Some add a waveguide to measure the lowest liquid level. However, when the liquid level in the waveguide rises, the gas in the pipe is compressed, which affects the actual liquid level. Can a hole be made in the top side wall of the waveguide? I don’t know how everyone did it?
Using guided wave radar level gauge or servo level gauge, the accuracy can reach 1mm, ENRAF or SAAB. This post was last edited by sunyork on 2009-2-6 08:50 ]
Many balancing holes must be opened on the waveguide. 1) The RTG40B 8” array antenna is required to be installed in an 8” SCH20-80 waveguide, with an inner diameter ranging from 206.3 to 193.7 mm. The vertical deviation of the waveguide installation is less than +/-0.5 degrees. 2) Drill a balance hole with an inner diameter of 25 mm every 300 to 400 mm on the waveguide, and the center lines of each adjacent balance hole differ by 180 degrees in the vertical direction. The welding of waveguide sections is sleeve welding, the gap is less than 1 mm, and the eccentricity is within 1 degree. The inner wall of the waveguide must be smooth. * * prick. 3) The top flange of the waveguide for installing the radar should match the ANSI 8” 150LB equipment flange, and the installation horizontal deviation of the flange should be less than +/-2 degrees. A reflective plate needs to be installed at the bottom of the waveguide to prevent the tank bottom from being uneven. This post was last edited by sunyork on 2009-2-6 08:56 ]
The opening on the top side wall of the waveguide will cause the volatilization of the medium, and the internal floating roof tank generally prevents the volatilization of the medium. Open-pore media will evaporate.
You can use the radar level gauge produced by Monsmont, which is very accurate.
Hemet's radar level gauge can be used, and its processing method is as follows: install a reflective plate on the top of the inner floating roof, and move as the liquid level changes, the microwave radar can measure the position of the reflective plate.