A non-metallic fabric compensator, also known as a non-metallic expansion joint or fabric expansion joint, is a device used to absorb axial, lateral, and angular displacements in a piping system due to thermal expansion and contraction, vibration, or structural displacement. It is mainly used in pipeline systems of high temperature, high pressure and corrosive media, such as flue, air duct, gas pipeline and powder conveying system in chemical industry, electric power, petroleum, metallurgy, cement and other industries.
Construction and Materials
The non-metallic fabric compensator is mainly composed of multiple layers of non-metallic materials with different functions, including but not limited to:
High temperature resistant material: Such as aluminum silicate, ceramic fiber, used to withstand high temperature environment.
Sealing material: Such as PTFE (polytetrafluoroethylene), silicone rubber, used to maintain good sealing.
Reinforcement material: such as glass fiber, Kevlar fiber, to enhance the structural strength of the compensator.
Protective material: such as PTFE-coated fiberglass cloth, providing additional protection against abrasion and environmental erosion.
Working Principle
The non-metallic fabric compensator can absorb the displacement in the pipeline system through its characteristic softness and elasticity, thus reducing the stress on the pipeline and equipment and avoiding the damage of the pipeline system due to displacement. Moreover, it also has good sound insulation and vibration damping effects, capable of reducing the noise level and vibration transmission of the plumbing system.
Features and Advantages
Strong compensation ability: Able to handle a wide range of axial, lateral and angular displacements.
Lightweight: Compared to metal compensators, non-metallic fabric compensators are lighter and easier to install and maintain.
Strong adaptability: Can cope with all kinds of complex working conditions, such as high temperature, high pressure, corrosive media, etc.
Good sealing: Multilayer composite material ensures good sealing performance and prevents media leakage.
Vibration and noise reduction: Effectively absorb pipeline vibration and reduce system noise.
Fields of application
Power industry: Flue and air duct systems for coal, oil and gas-fired power plants.
Chemical industry: High-temperature, corrosive media delivery pipelines used in chemical production processes.
Iron and steel metallurgy industry: High temperature gas delivery pipeline used in blast furnace, converter and coking workshop.
Cement industry: High temperature gas pipelines for kilns, dryers, mills.
Environmental protection industry: High temperature flue gas pipeline used in waste incineration, waste gas treatment and other systems.
When designing and selecting non-metallic fabric compensator, factors such as working conditions, medium characteristics, displacement type and size should be fully considered to ensure the safe and reliable operation of the compensator.