Core function: Heat preservation and cold preservation. For manholes of storage tanks and pipelines that transport high-temperature media (such as steam, hot oil), the insulation sleeve can reduce heat loss to the outside and maintain the stability of the temperature of the medium inside the equipment. For example, a chemical reaction kettle needs to continuously maintain a reaction temperature of 150°C. If the manhole is not insulated, the local temperature will drop due to heat loss, affecting the reaction efficiency. However, the insulation sleeve can reduce the heat loss rate by more than 30%, indirectly reducing the energy consumption of the heating system.

Auxiliary function: Protecting equipment and manhole components. Preventing aging of manhole components: It avoids direct exposure of manhole flanges, gaskets, bolts, etc. to high temperature, low temperature, humid or corrosive environments. For example, under high-temperature working conditions, bolts are prone to thermal expansion and contraction deformation due to long-term high-temperature baking, leading to seal failure. The insulation sleeve can isolate high temperatures, extend the service life of bolts and gaskets, and reduce the risk of leakage.

Reducing local loss of equipment: The area around the manhole of some equipment (such as boilers) is prone to thermal stress due to uneven temperature, which may cause cracking of the equipment shell in the long run. The insulation sleeve can make the temperature distribution on the equipment surface more uniform and alleviate the damage of thermal stress to the equipment body.