I've seen those red topped marker posts IRL before and then I realised you could add pipelines in OSM after noticing this one, which you can follow its route via gaps in trees: https://www.openstreetmap.org/way/762692759/ 
I've since added others also using colour changes you can see in grass/fields and markers from geograph pictures etc.

Recently found this Fife map which helped join the bits together in this changeset.
https://fifeonline-maps.maps.arcgis.com/apps/instant/interactivelegend/index.html?appid=196b631dc3d04a86a8a7388dd02b6ea3 (hide everything but hazard areas) 

There's also https://openinframap.org/#11.39/56.0663/-3.3856/A,B,I,L,O,P,S,T,W for showing the pipelines and power stuff in OSM. 