Fabric expansion joint, also named non-metallic compensator, the main function is to absorb the relative displacement of two parts with relative displacement and two with a relative displacement between the parts of the connection channel seal.
The fabric expansion joint consists of non-metallic cover, thermal insulation part, metal flange, rib plate, bolt and stainless steel mesh, ceramic fiber rope or pillow-shaped sealing material. The cover is made of heat-resistant rubber and glass cloth. Different parts of the fabric expansion joints, there are differences in the internal structure, such as the inside of the cover and a layer of PTFE insulation film, the insulation part of the aluminum silicate fire-resistant fiber felt or rock wool ceramic fiber cloth composition insulation, insulated by the aluminum silicate fire-resistant fiber mat, and covered with glass ceramic fiber cloth. The main design parameters of fabric expansion joint :
Design pressure: 0.1 MPa
Working pressure: ≤0.1MPa
Working temperature: 900 ℃ (Short time temperature resistance 1000 ℃)
Working medium: high temperature flue gas
The expansion direction of the fabric expansion joint in three-dimensional direction is different due to the working position of the non-metallic expansion joint. The design of fatigue life of the fabric expansion joint is about 3000 times. The service life of fabric expansion joint is not only concern the material, but also the sealing structure design of the furnace side of the flue gas, and this is proved on the operating boiler.
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