Hantai p-class fireproof sleeve new p-class fireproof sleeve is made of 9 micron alkali free glass fiber knitted coated with high temperature organic heat-resistant silica gel. After high temperature vulcanization, it has excellent high temperature fireproof performance and heat insulation effect. The product has flame retardant grade of VW-1, insulation grade of ≥ 7kv, tensile strength of ≥ 5.5mpa, tear strength of ≥ 10kN / m, elongation of ≥ 200%, and hardness of 40-45shore a. The thermal insulation performance of the new knitted structure p-class fireproof sleeve is superior. The patent number of Hantai patent product is 201620975739.9. It is widely used in robot, metallurgical casting, hydraulic fluid pipeline, medium frequency induction furnace, rail transit, harness, cable, metal hose and other harsh environment of high temperature protection.