Pipeline renovative insulation - involves multilayer insulating cover with directly applied layer enclosed by vapour-braking foil

摘要

A pipe insulation is for the renovation of conduits carrying media with different temps., and which are supported by spaced pipe bearings. The insulating cover (2) enclosing the line (1) is multi-layered. The layer (8) applied directly to the pipe surface (7) comprises prefabricated insulating shell parts (9,10). The layer is enclosed by a vapour-braking foil (15) and the middle layer (17) is formed by isocyanurate half shells (18,19) the seams (20) of which are closed in a vapour-tight manner. A third layer (22) is of polyurethane, which is covered by a welded sealing foil (27) supported by distance holding rings (24,25). As cover (28) a refined steel plate is used, which is tensioned via straps from the outside on the sealing foil. Also claimed is a insulation process using the pipe insulation. USE/ADVANTAGE - For renovation of conduits transporting media with different temps. A conduit insulation which can be fitted whilst the conduit is in operation without risk to the operator.