Transport pipelines play an important role and position in today's carrying objects. Therefore, the anti-corrosion and heat preservation treatment of pipelines is increasingly valued!
       When the air duct conveys general gas, derusting and anti-rust paint treatment shall be applied to the duct of the black steel plate, and a wear protection layer may be sprayed on the dust-laden gas. When the ambient air humidity is relatively high, the outer wall of the air duct must be prevented. Corrosion, anti-rust treatment. For the transport of high temperature, high humidity gas galvanized steel duct wall should be sprayed phosphate primer or other corrosion resistant coatings. When the air duct transports high-temperature gas or low-temperature air, the outer wall of the air duct should be insulated (cooled). The
       The purpose of heat transfer of high-temperature gas ducts is to prevent the heat loss of the air in the ducts (appearing in central air-conditioning systems in winter); and to prevent room temperature from increasing due to the dissipation of heat into the room during the transport of waste steam or high-temperature gases. It can also prevent people from getting burned by touching the air duct. In the summertime, condensation occurs on the outer wall of the pipe due to the fact that the temperature of the conveying gas is lower than the ambient dew point temperature. This will increase the loss of cooling capacity for the air ducts of the centralized air-conditioning system. At the same time, the condensed water droplets will contaminate the suspended ceiling and the wall surface. Therefore, insulation and cooling should also be performed.