- no, the tag man_made=pipeline is not required. the description "Use this tag only in combination with man_made=pipeline" is unfortunately misleading. It means that substations are almost always facilities where pipelines start, end or pass through. therefore substations are used in combination with pipelines. hth. --Rfuegen (talk) 22:50, 15 June 2016 (UTC)
Comment from user "Pezhman"
Pipeline transmission is not industrial, since no goods are produced. In the long term I would like to accomplish rendering pipeline substation even without the landuse=industrial tag on openstreetmap-carto.--User:Pezhman