Kunshan PVC pipe When the duct gas transmission general, the black steel duct should be rust, brush anti-rust paint treatment, dust-laden gas can be sprayed anti-wear protective layer, when the ambient air humidity is high, the duct wall Need to do anti-corrosion, anti-rust treatment. On the transmission of high temperature, high humidity galvanized steel duct wall should be sprayed with phosphating primer or other corrosion-resistant coating. In the air duct high temperature gas or low temperature air, the outer wall of the duct should be done insulation (cold) treatment.

Conveyance of high-temperature gas duct insulation purposes, first, to prevent heat loss in the air pipe (in the winter air-conditioning system); the other is to prevent the transmission of waste heat steam or high-temperature gas to prevent heat dissipation into the room leaving room temperature , But also to prevent people from contact with the duct and scalded. And in the summer is often due to the temperature of the transmission gas is lower than the ambient air dew point temperature, the pipeline wall will produce condensation. This air conditioning system of centralized air duct will increase the cooling loss, while condensation of water droplets will pollute the ceiling and wall surface, it should also be cold insulation.