Hot gas flue pipe
OwnerHans Viessmanninventor
Life of this patent
Estimating the term…
Abstract
There is disclosed a hot gas flue pipe assembly designed for use inside a heating boiler. The assembly has an outer pipe and an inner pipe, and the outer pipe envelopes the inner pipe in such a way that circumferential contact deformations disposed at least in separate sub zones are capable of transferring heat between the two pipes. In order to prevent the occurrence of cracking noises during the flow of hot flue gases through the hot gas flue pipe, or at least to reduce such noises to an acceptable level, the inner pipe comprises one or more sections which, when inserted inside the outer pipe, define with their opposed ends, a circumferential gap that is filled with an elastic, heat-resistant and moisture-resistant cementitious material.
Claims8
A hot gas flue pipe assembly suitable for installation inside a heating boiler, said hot gas flue pipe assembly comprising an outer pipe and an inner pipe, said outer pipe having heat transfer contact points said outer pipe being in contact with said inner pipe over at least a portion of its length and further in contact in at least in sub-zones thereof by means of circumferential contact deformations so as to facilitate heat transfer, said inner pipe comprising at least one section, said inner pipe delimiting with the opposing ends of its sections a circumferential gap that is filled with an elastic, heat-resistant and moisture-resistant cement.
Dependencies are inferred from the claim text.