"<a href=""https://www.youtube.com/watch?v=OgMXjAQ5q14&amp;t=1m42s"">1:42</a> "It doesn't actually feel warm", if it was, the pipe wouldn't do it job"<br><b>Cries in Russian, remembering those giant long uninsulated pipes from  our power plants</b>,(reply>), If pipes look uninsulated to an untrained eye it does not mean they all are. The outer galvanised metal shell IS on top of insulation.