The non-metallic Compensator skin has the names of non-metallic fabric skin, non-metallic expansion joint skin, fabric expansion joint skin, desulfurization skin, denitration skin and so on. It is mainly composed of multi-layer fire-resistant and high temperature resistant glass fiber fabric and insulation cotton. It has many advantages, such as wide temperature range, high pressure resistance, strong corrosion resistance, good flame retardant performance, sound absorption and noise reduction, vibration isolation, good flexibility and so on. It can effectively reduce the noise and vibration of boiler, fan and long distance pipeline system, and simplify the pipeline design of the whole system. Compared with metal compensator, it has the advantages of low price, light weight, fast production, simple and convenient replacement.