Pipe internal insulation

摘要: The insulation (1), for insertion into a pipe, has conduit (3) through which fluid may flow and insulating means (5) is disposed to the outside of arranged such that, when (1) inserted serves restrict transfer thermal energy between pipe. be flexible, ribbed, hollow tube made from polypropylene plastics material length foamed, closed cell polyethylene substantially annular cross section that surrounds extends along conduit, or longitudinal series radial fins around conduit. pipe condensate drain external building having condensing boiler.