As part of the refinery is still in use, I would keep it like that, but add disused:* disused:\* to the dismantled elements, or maybe abandoned:*. abandoned:\*. That depends on the state of the elements. The wiki says: disused: not currently available for use, but could be reinstated easily usage: ~37,000 in taginfo as of 08/2016 abandoned: still visible but fallen into serious disrepair and which could only be put back into operation with considerable effort

As part of the refinery is still in use, I would keep it like that, but add disused:* to the dismantled elements, or maybe abandoned:*. That depends on the state of the elements. The wiki says: disused: not currently available for use, but could be reinstated easily usage: ~37,000 in taginfo as of 08/2016 abandoned: still visible but fallen into serious disrepair and which could only be put back into operation with considerable effort