Purpose of instrument tag numbers
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In the flowchart, there is a tag number MI on the pump, as shown in the figure. Does this MI indicate operating status or speed?
In flowcharts, “MI” usually stands for “Mechanical Indicator”, which is used to display the operating status of devices such as pumps, including parameters like pressure, temperature, or speed. Regarding the MI on the pump you mentioned, in the absence of more detailed contextual information, it is generally assumed to indicate the operating status of the pump, such as the speed indication. However, specific details still need to be confirmed by referring to the relevant detailed design documents or standards. .