Selection of on-site level gauges for horizontal thermal oil storage tanks
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Some time ago, officials from the local special inspection agency came to inspect the heating furnace. They saw that the level gauge used for monitoring the liquid level in our horizontal heat transfer oil storage tank was a magnetic float level gauge, and they said it did not meet the requirements; they suggested replacing it with a level gauge made of quartz glass tubes. May I ask what type of level gauge is used for the heat transfer oil storage tanks?
According to TSG21-2016, 9.2.2.1, clause 6, it is required that the liquid level indication be stable; therefore, float-type level gauges are not permitted. I don’t know; the manager didn’t follow this requirement.
Thank you, it shouldn’t be this one； I just consulted the supervisor who was involved in the inspection at that time; the inspectors said that the magnetic float can easily absorb rust, and there is a risk that it might get stuck inside the float, resulting in an incorrect liquid level reading
I’ve learned it.* I always design them as magnetic flap level gauges; I haven’t considered that much.
On the drawings, the design institute indeed specified a magnetic flip-type level gauge; no relevant requirements could be found in any other specified clauses. Regarding the requirement, as stipulated in TSG21-2016, 9.2.2.1, clause 6, that the liquid level indication must be stable, the use of float-type level gauges is not permitted. Could experts please explain why this requirement exists?