Beijing Great Pack high temperature fire resistant sleeve has better thermal stability and fire resistance, radiation resistance, high temperature resistance, flame retardant and other functions. And widely used in high temperature metallurgy industry, substation protection engineering, Railway catenary system, rail transit, and other high temperature or high voltage industries. Due to the special manufacturing process adopted in the production process and the addition of special materials in the production process, the fire resistant sleeve can adapt to the high temperature environment and low temperature environment without any damage and deformation.