hi, I'm pretty sure that this was a mistake I made when I added this node a long time ago. "RR" is a "Riechrohr", "KH" is a "Kugelhahn", this is shown on the marker plate. so it most likely needs to be tagged as "name=RR 250" or "id=RR 250". unfortunately can't reach OSM wiki right know. Maybe I'll look it up later (pipeline tagging scheme) or please check other marker nodes in the vicinity, how they are tagged.

@SomeoneElse The proposal wiki page says nothing about consulting the MEP during the proposal process. and it explicitly mentions tagging@openstreetmap.org. quote: "Let people know of your new proposal by sending a mail to the tagging mailing list, not the talk list. "

a discussion on the MEP will be initiated and ITO has been notified osm.wiki/ITO_Map_ideas#Pipelines_without_a_type.3D.2A_tag

@mcld I personally surveyed ~1600 markers in the field in my area. therefore I should have some experience to change markers in other countries without causing havoc. actually, using both man_made=pipeline and pipeline=marker on a single node was just wrong and that was the main purpose of the change.
apart from that, if we remove all armchair edits from the database, it would be half empty.

what do you want? I followed the whole proposal process:
1) created a draft
2) open it for discussion on the proposal talk page AND the tagging maliling list. see section 4 of the proposal process wiki page) and read the whole thread, not just my post.
3) the proposal was voted for and approved by 18:4 votes.

the global "mechanical edit" process will be initiated after the holiday season is over. is there a law preventing manual edits of tags that have been approved?

https://lists.openstreetmap.org/pipermail/tagging/2014-November/020093.html

this was a manual update, removing obsolete "man_made=pipeline" tags from nodes that obviously are markers, in accordance to the pipeline wiki page.

each node was checked manually.