Metal packing is a tower packing made of carbon steel, stainless steel, aluminum alloy and other materials. It has the characteristics of thin wall, heat resistance, large void, large flux, small resistance, high separation efficiency, especially suitable for vacuum distillation column, processing heat sensitive, easy decomposition, easy polymerization, easy carbon formation materials. Metal packing is widely used in packing towers in petrochemical, fertilizer, environmental protection and other industries.