Is inconsistent readings from two level gauges considered a potential hazard? Is there evidence?
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Expert inspections revealed that our company’s atmospheric pressure tank area is equipped with only one set of on-site magnetic flap level gauges and one set of remote transmission level gauges. According to (SHT 3007-2014 Standards for the Design of Storage Areas in Petrochemical Processing Systems – 6.3.4), pressure tanks should be fitted with an additional set of level measurement instruments or level switches dedicated to detecting high liquid levels and triggering the interlock to shut off the valves controlling the feed pipes to the tanks. The set level for the high liquid level alarm should not be higher than the level at which the liquid volume reaches 90% of the tank’s calculated capacity. ) Our company has added another set of double-flange remote level gauges, but the readings from these gauges do not match. It is required that the self-control settings be adjusted to match; if self-control cannot be adjusted, then no adjustment will be made. Is this considered a potential hazard? Can I request rectification on the grounds of potential hazards? Are there any standard specifications required?
If all the level gauges are functioning properly, for multiple level gauges, it is possible to use the average value or select two out of three
It’s a bit exaggerated to say that the level gauges have to be identical
How do you expect him to make adjustments? The structural format and working principle are different in the first place, not to mention that the choice of 0 point during installation may also vary. There’s also the factor of temperature outside, so this is just taking advantage of honest people.
A deviation within 10% can be considered acceptable without further adjustment, but deviations of over 10% or even 100% are definitely unacceptable