Non-metallic compensation rectangular duct smoke is mainly used for power plants to absorb heat displacement and (or) shock absorber for the media: air, flue gas and dust; basically there is not much pressure -20-30KPa; temperature in 450 degrees, if the temperature reaches 800 degrees to 1,000 degrees, can be produced according to customer requirements for high-temperature non-metallic compensation rectangular. Non-metallic compensation rectangular material: 1. metal structure material is generally recommended t≤400 ℃, using the Q235-hi and A; 400 ℃ (t≤450 ℃, the selection of material 10 or Q345 (16Mn) should use other materials. As a special design; 2. non-metallic circle with a pass stratosphere material, depending on the operating temperature, commonly glass fiber cloth, PTFE film, composite rubber fiberglass cloth, ceramic fiber cotton and other materials do not. It allows the use of asbestos products material non-metallic compensation rectangular 3 Connection: The default is interpolated welding, pipe is inserted into the compensation interface, insert the amount of 20mm flange connection can also be used, non-rectangular flange connection. length and amount of the metal compensator compensation and interpolation same form For welded pipe made according to customer's production requirements: You can provide us outside and rectangular duct size width (AXB); occasions; the use of media , temperature and pressure; connections and dimensions.