The product features excellent thermal conductivity, high temperature resistance, corrosion resistance, oxidation resistance, and a long service life. It is used in industrial kilns for sectors such as steel metallurgy. 1. The flame inner tube is made of silicon carbide material SiSiC, capable of withstanding high thermal stress. 2. Multi-section inner tubes can be combined to form the required length based on the radiation tube's dimensions. 3. The SiSiC flame inner tube allows for the bending of metal radiation tubes without damaging the flame inner tube or the radiation tube. 4. Compared to metal inner tubes, the SiSiC flame inner tube is lightweight, reducing the load on the metal radiation tube. 5. In comparison to metal inner tubes, the SiSiC flame inner tube offers higher thermal conductivity.