2015-10-06 10:42 GMT+02:00 Christoph Hormann <chris_horm...@gmx.de>: > > > > can you give an example for a pipeline without a pipe? > > Apart from the pressure tubes of hydropower plants the most common case > is probably sewer pipes. For general transport pipelines cutting them > into rock is rare due to the high costs. Hydropower penstocks are an > exception mostly due to the high volume high pressure combination and > sewage due to the space constraints in urban environments.
but are these called "pipelines"? Aren't those "pressure tunnels" / "hydraulic galleries"? The only pipeless pipelines I could find in a quick search are referring to a python library ;-) I'm not sure (not rethoric, I'm really not sure, maybe we should indeed?) whether we want to use man_made=pipeline for all kind of linear way for liquids and gas, regardless of size, length, construction, purpose. The wiki says the tag is only for "major" pipelines (typical wiki speech, not usable to make a decision, I'd rather remove this word to avoid splitting hair). Would the water tubes and sewage tubes in my house be regarded a "pipeline"? The one in the road in front of my house? What would be a sensible limit? Might depend on the substance as well, e.g. a beer pipeline might have only 20mm and would already be significant. Cheers, Martin
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