What are the parts of non-metallic expansion joints?

The basic principle of non-metallic expansion joints is to use the flexibility of non-metallic materials to compensate for the thermal expansion and contraction deformation of the pipeline system due to temperature changes. The structure mainly includes: skin, insulation cotton, thermal insulation filler layer, frame, baffle, drainage hole. 1 . Skin: is the main expansion body of non-metallic expansion joint, is made of excellent performance of silicone rubber or oxygen rubber cloth because these materials have high temperature and corrosion resistance, not steel wire mesh, insulation cotton and other multi-layer composite, is a kind of high strength sealing composite materials. Its role is to absorb the amount of expansion, to prevent leakage of air and rainwater leakage. Have good airtightness.
2 . Insulation cotton: insulation cotton is a dual role of both insulation and airtightness of non-metallic expansion joints, which is composed of glass fiber cloth, high silica oxygen cloth and various types of insulation cotton, whose length and width are consistent with the outer skin, with good extensibility and tensile strength. Insulation filler layer: non-metallic expansion joint insulation important guarantee, is composed of aluminum silicate cotton and other high-temperature resistant materials, its thickness can be determined by heat transfer calculation according to the temperature medium temperature and thermal conductivity of temperature-resistant materials.
3 . Frame: sufficient strength and rigidity, material and medium temperature to adapt to
4 . Baffle: with corrosion resistance, wear resistance with the role of the inflow and protection of the thermal insulation layer
It is these materials made, cast a strong non-all metal expansion joint, they are important for non-metallic expansion joints. It can compensate axial, angular, with no thrust, simplified support design, corrosion resistance, high temperature resistance, muffling vibration reduction, etc., the body is light, simple structure, easy installation and maintenance, and the price of non-metallic expansion joints is lower than that of metal expansion joints, especially suitable for hot air ducts and fume ducts, and in power plants, cement plants, boiler plants, chemical plants are particularly suitable.