The super high pressure steam (SS) pipelines of the 220 kt/a ethylene plant at PetroChina Dushanzi Petrochemical Company have been used for a long time, and the insulation effect is poor. The overtemperature of pipeline surface causes safety hazards to personnel in maintenance and inspection, and the great heat loss is not conducive to the normal operation of cracking gas compressor. It is necessary to replace the insulation material of some steam pipelines with aerogel to eliminate the potential safety hazards and achieve the goals of production increase and consumption reduction.