The insulated ones transport steam or hot water from one plant to the other, don't they?


Steam, iirc there's a CHP station (it hasn't been their that long, BM recycled part of one of their sites to build it. The fun thing was the palaver about 'industrial heritage', the place was collapsing from corrosion anyway!) to provide power for the Solvay process, most of the steam is used at the other plant. even with a couple of miles of pipework they reckon the system is 80% effecient plus they get security of supply.