According to different working conditions and environments, there are different types of high temperature resistant bushings. In addition to high temperature resistance, the materials used are generally required to have the characteristics of heat preservation, heat insulation, insulation, sealing, flame retardant, eye-catching, etc. The protection of the pipeline also requires dust-proof and beautiful appearance. It is required to have good weather resistance, oxidation resistance or ultraviolet radiation resistance for outdoor environment. In most high temperature areas, as a consumable, it is coated with alkali-free glass fiber. The fireproof casing covered with silicone is undoubtedly a product with high cost performance.The outer layer of silica gel has a long-term temperature resistance of 260 degrees. The entire sleeve is carbonized after about 15 minutes in an environment up to 1090 degrees, and can withstand about 30s in a 1650-degree destructive test, and its silicon-oxygen bond stability determines its good chemical stability resistance, acid and alkali resistance, ozone resistance, oil resistance.
