Method and sealing system for sealing an annular space between a rigid conduit and a pipe, tube or duct extending through the conduit and made of a thermally weakenable material

摘要

Method for sealing an annular space in a rigid conduit (2) and a pipe, tube or duct (3) extending through the conduit (2) and made of a thermally weakenable material, wherein the method comprises applying in the conduit a layer (4) of a thermally expandable material concentrically around the pipe, tube or duct, and applying at each end of the conduit (2) between the conduit and the pipe, tube or duct (3) a sealant being made of a fire resistant polymer.