The product features good 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, which can withstand high thermal stress. 2. Multi-section inner tubes can be combined to form inner tubes of the required length based on the radiant tube's dimensions. 3. The SiSiC flame inner tube allows the metal radiant tube to bend without damaging the flame inner tube or the radiant tube. 4. Compared to metal inner tubes, the SiSiC flame inner tube is lightweight, reducing the load on the metal radiant tube. 5. In comparison to metal inner tubes, the SiSiC flame inner tube has higher thermal conductivity.