Usually custom ventilation ducts are fabricated using galvanized ducts, and stainless steel ducts are used in corrosive and particularly humid locations. When the ambient air humidity is high, the outer wall of the air duct should be treated with anti-corrosion and anti-rust treatment. The inner wall of the air duct conveying high temperature and high humidity should be sprayed with phosphating primer or other anti-corrosion coatings. When the air duct transports high-temperature gas or low-temperature air, the outer wall of the air duct should be treated with heat preservation (cold preservation).
The purpose of thermal insulation of air ducts carrying high temperature gas is to prevent heat loss from the air in the ducts (which occurs in centralised air conditioning systems in winter). When conveying waste heat steam or high-temperature gas, in order to prevent heat from being transferred into the room and raising the room temperature, it can prevent people from touching the air duct again and getting burned.
In summer, when the temperature of the conveyed gas is lower than the dew point temperature of the surrounding air, condensation will occur on the outer wall of the duct of the spiral duct machine. Air ducts in central air-conditioning systems increase cooling losses, and condensation droplets can contaminate ceilings and walls and floors. Therefore, cooling and thermal insulation should also be carried out.
Good thermal insulation performance, the specifications of the next thermal insulation material should meet the requirements of the air duct system used, not only that, but also the design requirements of the air duct, and the thermal insulation material has a product quality certificate and other qualified documents.
Galvanized steel spiral air duct is basically the characteristic of stainless steel spiral air duct, but the price is relatively only two-thirds of the stainless steel air duct, or even lower. Air ducts are generally used in environments where the environment is relatively common, and the requirements for air ducts are not too high.
Insulation materials can effectively protect the spiral duct machine pipes from damage in winter. The most widely circulated spiral air duct in the market is the galvanized spiral air duct.
Composite spiral air ducts are generally used in environments where the environment is relatively common, and the requirements for air ducts are not too high. In terms of clean air ducts, fire-resistant closed-cell rubber foam insulation materials are generally used, and non-combustible aluminum foil glass wool boards are used for smoke exhaust air ducts. These two materials are more common and have better thermal insulation performance.
When using thermal insulation materials, it is necessary to make the thickness of the glue uniform before coating the spiral air ducts of industrial and construction packaging, and there should be no glue flowing. There will also be no more pipes exposed.
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