| 摘要 |
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, heatresistant and moisture-resistant cementitious material. |
