Coming from oil industry/EPC, I'm accustomed to NOT having individual tag numbers for simple manual valves. In my new job, they have tagged every valve in the entire plant... V001, V002 etc. (As you can see, a very small plant!) We're going to be designing another (much larger) plant in the next year or so. Does anyone else ever tag all manual valves? I've only ever seen the following valve tagging:- Valve tags indicating the valve spec in use. These would be common to all valves matching the same purchasing description so they would not be unique to the individual valve, or- individual valve codes where the valve was part of lock-out tag-out or part of a car seal valve program so that logs and checklists could be created and maintained.I have not seen situations where every routine valve has it's own individual tag.

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