[Tagging] pressurized=* on pipelines

[Alan Mackie]

How verifiable is this tag in practice? Most infrastructure laying around
doesn't have visible gauges. Half the examples so far are hydrostatic which
arguably applies to anything holding any depth of fluid.

I think this runs the risk of tagging speculation except in rare cases.
Should this be limited to situations with warning signs about "contents
under pressure" etc.?

On Wed, 15 Sep 2021, 03:25 Kyle Hensel, <K.y.l.e at outlook.co.nz> wrote:

> Hi François,
>
>
>
> If the tag pressure=yes is acceptable we should definitely document this.
>
> There are currently only 3 instances of pressure=yes in OSM, perhaps
> because it is not mentioned on the wiki page for Key:pressure or
> Tag:man_made=pipeline.
>
>
>
> Additionally, is pressure=no acceptable?
>
>
>
>
>
> Kyle
>
>
>
> *From: *François Lacombe <fl.infosreseaux at gmail.com>
> *Sent: *Wednesday, 15 September 2021 18:07
> *To: *Tag discussion, strategy and related tools
> <tagging at openstreetmap.org>
> *Subject: *Re: [Tagging] pressurized=* on pipelines
>
>
>
> Hi Kyle
>
>
>
> Le mer. 15 sept. 2021 à 01:12, Kyle Hensel <K.y.l.e at outlook.co.nz> a
> écrit :
>
> Following on from
> https://lists.openstreetmap.org/pipermail/tagging/2021-September/062422.html
> regarding pressurized waterways:
>
>
>
> There is currently no way to indicate whether a man_made=pipeline is
> pressurized
> Some wastewater pipelines use gravity to flow to the bottom of the hill
> (unpressurized), whereas some pipelines are obviously pressurised like LPG
> and geothermal steam.
>
>
>
> You can use pressure=yes unless you know the actual value in bar.
>
> https://wiki.openstreetmap.org/wiki/Key:pressure
>
>
>
>
>
>  So, if we were to introduce pressurized=yes/no for pipelines, would it
> make sense to replace waterway=pressurized with
> waterway=canal/river/stream/ditch and pressurized=yes/no? To be consistent.
>
> pressurized=yes/no would only be allowed on waterway=* if tunnel=* is also
> present.
>
>
>
> As river, canal, stream or ditches are open flow waterways, it makes less
> sense to combine them with pressurised.
>
> If pressure>0, then waterway=pressurised is expected.
>
> https://wiki.openstreetmap.org/wiki/Key:waterway#Values
>
>
>
> Tunnels aren't the only infrastructure that can handle pressure.
>
> Depending on the construction (tubes or not), waterway can also be
> combined with man_made=pipeline (for penstocks for instance).
>
> There are some discussions about that in
> https://wiki.openstreetmap.org/wiki/Proposed_features/Hydropower_water_supplies
>
>
>
> Best regards
>
>
>
> François
>
>
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>
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